Damnit, I'm sick of this! Please help me out guys! Car stalling intermittently.
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From: centennial, CO
2003 c240
CPS is very likely but I wouldnt rule out the fuel pump. My car acted almost identical to yours. It would start up fine after the car sat for a little while, but would constantly die after driving for a bit. It then would not start up again until it sat for a while and then get on the gas and it would stall. My assumption is that when the pump cooled down it would supply fuel but would later on heat up and stop working. I changed my pump and everything works fine now.
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From: Sacramento/San Gabriel/Riverside
01' C32o
Okay, here's how it starts up.
Crank it, it doesn't catch on until 3-4 seconds later, then it fires up. With the MAF plugged in, it will continue to idle till it just dies out. Sometimes it would "catch" itself, and jump the revs. With the MAF off, it will idle till I step on the gas.
Each time, stepping on the gas will kill the car.
Crank it, it doesn't catch on until 3-4 seconds later, then it fires up. With the MAF plugged in, it will continue to idle till it just dies out. Sometimes it would "catch" itself, and jump the revs. With the MAF off, it will idle till I step on the gas.
Each time, stepping on the gas will kill the car.
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From: Cape town
not a merc
Okay, here's how it starts up.
Crank it, it doesn't catch on until 3-4 seconds later, then it fires up. With the MAF plugged in, it will continue to idle till it just dies out. Sometimes it would "catch" itself, and jump the revs. With the MAF off, it will idle till I step on the gas.
Each time, stepping on the gas will kill the car.
Crank it, it doesn't catch on until 3-4 seconds later, then it fires up. With the MAF plugged in, it will continue to idle till it just dies out. Sometimes it would "catch" itself, and jump the revs. With the MAF off, it will idle till I step on the gas.
Each time, stepping on the gas will kill the car.
there is breather hose that connects to the intake pipe near the throttle body make sure its on and not cracked. if thats Try another MAF.
Those 112 engines dont really like to run without a MAF signal.
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From: Sacramento/San Gabriel/Riverside
01' C32o
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From: Cape town
not a merc
i mean an airtight seal between your airmass and throttle body. Are you able to plug a diagnostic tool into your car and read fault codes? because that would really narrow it down.
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Joined: Jun 2011
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07 c230
Hi,
I'm new here but i would like to help.I will agree with some of the other guys by saying you need to scan it and pull any codes or pending codes,as this will help narrow your problem area.Other than that i wouldnt rule out any possible causes.I'm not saying its a maf problem but unplugging it and the car will run/idle is a direction to look into,also i have seen k&n fill maf's although i do have them in my 07 sport w/272 with no problems they can come over oiled so cleaning might help and is a cheap route to take first.
I have also seen clogged fuel filters cause cars to stall after a bit of running and driving and when the car stalls and sits for a while the dirt will settle and allow the car to start and run again for a while.So dont entirely rule that out either yet.
But you need to scan the car first,i had my infiniti have an intermittent starting issue which i thought was a fuel pump problem,with no cel the next time it happened i scanned it turns out immobilizer went bad.So believe me issue arent always what they seem the benz being a smart car it should point you in the direction to look.
How long does the car run with the maf unplugged,a little while and idle sorta fine?But it does sound like the maf direction to me.
I'm new here but i would like to help.I will agree with some of the other guys by saying you need to scan it and pull any codes or pending codes,as this will help narrow your problem area.Other than that i wouldnt rule out any possible causes.I'm not saying its a maf problem but unplugging it and the car will run/idle is a direction to look into,also i have seen k&n fill maf's although i do have them in my 07 sport w/272 with no problems they can come over oiled so cleaning might help and is a cheap route to take first.
I have also seen clogged fuel filters cause cars to stall after a bit of running and driving and when the car stalls and sits for a while the dirt will settle and allow the car to start and run again for a while.So dont entirely rule that out either yet.
But you need to scan the car first,i had my infiniti have an intermittent starting issue which i thought was a fuel pump problem,with no cel the next time it happened i scanned it turns out immobilizer went bad.So believe me issue arent always what they seem the benz being a smart car it should point you in the direction to look.
How long does the car run with the maf unplugged,a little while and idle sorta fine?But it does sound like the maf direction to me.
Last edited by phil240; Jun 25, 2011 at 07:18 PM.
Thread Starter
MBWorld Fanatic!
Joined: Aug 2007
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From: Sacramento/San Gabriel/Riverside
01' C32o
Hi,
I'm new here but i would like to help.I will agree with some of the other guys by saying you need to scan it and pull any codes or pending codes,as this will help narrow your problem area.Other than that i wouldnt rule out any possible causes.I'm not saying its a maf problem but unplugging it and the car will run/idle is a direction to look into,also i have seen k&n fill maf's although i do have them in my 07 sport w/272 with no problems they can come over oiled so cleaning might help and is a cheap route to take first.
I have also seen clogged fuel filters cause cars to stall after a bit of running and driving and when the car stalls and sits for a while the dirt will settle and allow the car to start and run again for a while.So dont entirely rule that out either yet.
But you need to scan the car first,i had my infiniti have an intermittent starting issue which i thought was a fuel pump problem,with no cel the next time it happened i scanned it turns out immobilizer went bad.So believe me issue arent always what they seem the benz being a smart car it should point you in the direction to look.
How long does the car run with the maf unplugged,a little while and idle sorta fine?But it does sound like the maf direction to me.
I'm new here but i would like to help.I will agree with some of the other guys by saying you need to scan it and pull any codes or pending codes,as this will help narrow your problem area.Other than that i wouldnt rule out any possible causes.I'm not saying its a maf problem but unplugging it and the car will run/idle is a direction to look into,also i have seen k&n fill maf's although i do have them in my 07 sport w/272 with no problems they can come over oiled so cleaning might help and is a cheap route to take first.
I have also seen clogged fuel filters cause cars to stall after a bit of running and driving and when the car stalls and sits for a while the dirt will settle and allow the car to start and run again for a while.So dont entirely rule that out either yet.
But you need to scan the car first,i had my infiniti have an intermittent starting issue which i thought was a fuel pump problem,with no cel the next time it happened i scanned it turns out immobilizer went bad.So believe me issue arent always what they seem the benz being a smart car it should point you in the direction to look.
How long does the car run with the maf unplugged,a little while and idle sorta fine?But it does sound like the maf direction to me.
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Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Mu $50 at Harbor Freight. This is the cheapest unit that tells you what the codes mean. It also behaves itself with Benz. Many on this board have this model. I use an Equus Innova 3130 but this baby is fine to keep in the glove box.
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Joined: May 2008
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W203
I picked this up for $30 on sale one week and keep it in my glove box. I don't know why so many people cry about not having a reader when this thing is cheap, reliable, and handy to keep around.
Thread Starter
MBWorld Fanatic!
Joined: Aug 2007
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From: Sacramento/San Gabriel/Riverside
01' C32o
Update
From messing around with it a bit more, I found out that the gas pedal is a bit picky. From messing around, I concluded that it stalls out when I push the pedal to the ground. If I only push it down 1-2cm of travel, it goes with no problem. It's when I step on it a bit more that it starts hesitating. So maybe it has to do something with the throttle/gas pedal too?
Senior Member
Joined: Apr 2008
Posts: 311
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From: SoCal/NorCal
08 E63
Tommy sounds like the throttle body is malfunctioning. Same thing was happening to my Tc (car acted same way as you discribed) took it to the dealer they swaped it worked fine after. only difference is the Tc has a sensor in the TB I dont know about our cars (looking at the pics I've seen online looks like it might). That can be your problem.
Thread Starter
MBWorld Fanatic!
Joined: Aug 2007
Posts: 3,560
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From: Sacramento/San Gabriel/Riverside
01' C32o
Tommy sounds like the throttle body is malfunctioning. Same thing was happening to my Tc (car acted same way as you discribed) took it to the dealer they swaped it worked fine after. only difference is the Tc has a sensor in the TB I dont know about our cars (looking at the pics I've seen online looks like it might). That can be your problem.
Thanks a lot bro, I'm hoping others can chime in, as I wanna get this running soon as possible. Thanks again! BTW, your daughter is beautiful! :]
Senior Member
Joined: Apr 2008
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From: SoCal/NorCal
08 E63
If you weren't so far i would go give you a hand and help you trouble shoot.
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Joined: Jan 2006
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From: Pasadena, CA
2002 C230K, 2013 BMW 328, 2015 BMW X5
Clear Cut, this seems like a fuel pump issue to me.
I just did two different fuel pumps this year. Too bad you don't still have the Brabus shift knob, I'd come over and swap in a pump to see if that cured your issues. Whatever you do, don't go with a used pump. More issues than the savings are worth. Ask me how I have done two pumps on the same car.
I also have the Innovo Scan Reader, but if it is a fuel pump issue, you won't get any codes.
Hmm, you do still have the AMG brakes? I have my stock Coupe brakes and rotors. Perhaps we could work something out.
I just did two different fuel pumps this year. Too bad you don't still have the Brabus shift knob, I'd come over and swap in a pump to see if that cured your issues. Whatever you do, don't go with a used pump. More issues than the savings are worth. Ask me how I have done two pumps on the same car.
I also have the Innovo Scan Reader, but if it is a fuel pump issue, you won't get any codes.
Hmm, you do still have the AMG brakes? I have my stock Coupe brakes and rotors. Perhaps we could work something out.
Last edited by SeaCoupe; Jun 28, 2011 at 07:28 PM.
Junior Member
Joined: Jun 2011
Posts: 23
Likes: 2
07 c230
Here's the thing we could all sit here and shout out what we think is wrong,but in all actualality is that you could buy that scanner which is very helpful at times for ppl. But the thing it wont do is lets say you TB is bad your gonna need a better one that can see live data and verify pedal depress percent/voltage to actual TB percent.Hence need to get it scanned.
One thing i will say you could try is,now im not 100% sure on this but if the ignition is on and you press the pedal the TB should react you should just be able to have a buddy look at the TB and see how far it opens depending on how far you press the pedal down.Correct me if im wrong this is a guess and a possible method you could try yourself but still doesnt give you any factual data on whats wrong with your car.
If this were indeed a maf problem some cars will stay running and still rev a little if you press the pedal a little bit before it would dye,full throttle most certainly will stall.
One thing i will say you could try is,now im not 100% sure on this but if the ignition is on and you press the pedal the TB should react you should just be able to have a buddy look at the TB and see how far it opens depending on how far you press the pedal down.Correct me if im wrong this is a guess and a possible method you could try yourself but still doesnt give you any factual data on whats wrong with your car.
From messing around with it a bit more, I found out that the gas pedal is a bit picky. From messing around, I concluded that it stalls out when I push the pedal to the ground. If I only push it down 1-2cm of travel, it goes with no problem. It's when I step on it a bit more that it starts hesitating. So maybe it has to do something with the throttle/gas pedal too?
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Joined: Jan 2006
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From: Pasadena, CA
2002 C230K, 2013 BMW 328, 2015 BMW X5
Phil,
a fuel pump problem won't throw any codes. A TB issue would create rough running, perhaps a stall if stuck, but in a few years on this board, I don't read about many TB issues.
a fuel pump problem won't throw any codes. A TB issue would create rough running, perhaps a stall if stuck, but in a few years on this board, I don't read about many TB issues.
Thread Starter
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Joined: Aug 2007
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From: Sacramento/San Gabriel/Riverside
01' C32o
Clear Cut, this seems like a fuel pump issue to me.
I just did two different fuel pumps this year. Too bad you don't still have the Brabus shift knob, I'd come over and swap in a pump to see if that cured your issues. Whatever you do, don't go with a used pump. More issues than the savings are worth. Ask me how I have done two pumps on the same car.
I also have the Innovo Scan Reader, but if it is a fuel pump issue, you won't get any codes.
Hmm, you do still have the AMG brakes? I have my stock Coupe brakes and rotors. Perhaps we could work something out.
I just did two different fuel pumps this year. Too bad you don't still have the Brabus shift knob, I'd come over and swap in a pump to see if that cured your issues. Whatever you do, don't go with a used pump. More issues than the savings are worth. Ask me how I have done two pumps on the same car.
I also have the Innovo Scan Reader, but if it is a fuel pump issue, you won't get any codes.
Hmm, you do still have the AMG brakes? I have my stock Coupe brakes and rotors. Perhaps we could work something out.
And great! I need brakes. Do you know if there's a difference between the C320 and C230 brakes? Maybe in terms of sizes and stuff? But I'd be more than happy to take the calipers and rotors off your hands. I need to put my 16'' stockies back on, but it ain't happening with the C32's.
Here's the thing we could all sit here and shout out what we think is wrong,but in all actualality is that you could buy that scanner which is very helpful at times for ppl. But the thing it wont do is lets say you TB is bad your gonna need a better one that can see live data and verify pedal depress percent/voltage to actual TB percent.Hence need to get it scanned.
One thing i will say you could try is,now im not 100% sure on this but if the ignition is on and you press the pedal the TB should react you should just be able to have a buddy look at the TB and see how far it opens depending on how far you press the pedal down.Correct me if im wrong this is a guess and a possible method you could try yourself but still doesnt give you any factual data on whats wrong with your car.
If this were indeed a maf problem some cars will stay running and still rev a little if you press the pedal a little bit before it would dye,full throttle most certainly will stall.
One thing i will say you could try is,now im not 100% sure on this but if the ignition is on and you press the pedal the TB should react you should just be able to have a buddy look at the TB and see how far it opens depending on how far you press the pedal down.Correct me if im wrong this is a guess and a possible method you could try yourself but still doesnt give you any factual data on whats wrong with your car.
If this were indeed a maf problem some cars will stay running and still rev a little if you press the pedal a little bit before it would dye,full throttle most certainly will stall.
Thanks.
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Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Check fuel pressure at rail point. Autozone will loan you a pressure tester.
The TB actuator can start fluttering/oscillating at high mileage causing rough running & stalling. It will not throw a code generally. Replacement is the only fix.
Mu - you are going to have to go through these things one by one & eliminate them. Check for codes as a guide. e.g. if you have a vacuum leak you will store a fuel trim code. Jumping around is never going to get you anywhere and reading codes will at least eliminate certain possibilities.
Good luck!
The TB actuator can start fluttering/oscillating at high mileage causing rough running & stalling. It will not throw a code generally. Replacement is the only fix.
Mu - you are going to have to go through these things one by one & eliminate them. Check for codes as a guide. e.g. if you have a vacuum leak you will store a fuel trim code. Jumping around is never going to get you anywhere and reading codes will at least eliminate certain possibilities.
Good luck!
Thread Starter
MBWorld Fanatic!
Joined: Aug 2007
Posts: 3,560
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From: Sacramento/San Gabriel/Riverside
01' C32o
Check fuel pressure at rail point. Autozone will loan you a pressure tester.
The TB actuator can start fluttering/oscillating at high mileage causing rough running & stalling. It will not throw a code generally. Replacement is the only fix.
Mu - you are going to have to go through these things one by one & eliminate them. Check for codes as a guide. e.g. if you have a vacuum leak you will store a fuel trim code. Jumping around is never going to get you anywhere and reading codes will at least eliminate certain possibilities.
Good luck!
The TB actuator can start fluttering/oscillating at high mileage causing rough running & stalling. It will not throw a code generally. Replacement is the only fix.
Mu - you are going to have to go through these things one by one & eliminate them. Check for codes as a guide. e.g. if you have a vacuum leak you will store a fuel trim code. Jumping around is never going to get you anywhere and reading codes will at least eliminate certain possibilities.
Good luck!
On a side note, I'll miss all you guys when I do get a different car. I've always loved this forum, and it's because of people like yall that makes me want to come back.
Thread Starter
MBWorld Fanatic!
Joined: Aug 2007
Posts: 3,560
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From: Sacramento/San Gabriel/Riverside
01' C32o
I'll be here, but I won't be as active like I was when I first got my car, lol. I'm planning to go JDM, or if I do stick with Euro, an e46 M3. Those things are very affordable nowadays lol
