C43 low on power, poor cold start, off-idle hessitation
MBWorld Fanatic!
Joined: Aug 2006
Posts: 7,053
Likes: 398
From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
I used "M156" knock sensors, cause new "M112/M113" not available around me,
and i hate to use any second hand Elec. items, kinda my weird habit..
,,
you can simply, not close the hood completely, and let someone to drive the car, and you can diagnose the car easily..!!
and i hate to use any second hand Elec. items, kinda my weird habit..
,,you can simply, not close the hood completely, and let someone to drive the car, and you can diagnose the car easily..!!
MBWorld Fanatic!
Joined: Aug 2006
Posts: 7,053
Likes: 398
From: A.D., U.A.E
2000 (W202 C200) & 2000 (W202 C55)
No bro., if they're less sensitive, will NOT put them,
as you know; knock sensors are the heart of Engine, can't joke with them, isn't..?!?,
they are better price than "M112/M113" sensors, and i like how bend of the EV1 connectors, more carving for connector plug..
you can go with "M112/M113" sensors, no problem with that, but in my case; they're NOT available around me,,
and IMO; they're not deserve the price, compared to "M156" sensors..!!
-;ZAYED;-
as you know; knock sensors are the heart of Engine, can't joke with them, isn't..?!?,
they are better price than "M112/M113" sensors, and i like how bend of the EV1 connectors, more carving for connector plug..
you can go with "M112/M113" sensors, no problem with that, but in my case; they're NOT available around me,,
and IMO; they're not deserve the price, compared to "M156" sensors..!!
-;ZAYED;-
Thread Starter
Senior Member
Joined: Feb 2017
Posts: 392
Likes: 9
From: Australia
W202 C43 1999
Yeah in some ways that is a plus, but on later model LT1 Corvettes, it was a common thing to add the LT4 knock sensor module, as it was less sensitive. The knock sensors themselves were the same, the ECM has interchangable modules to control sensitivity.
The idea behind this was due to different rocker arms being used, and those made more noise, which had an impact on knock sensor registers.
The idea behind this was due to different rocker arms being used, and those made more noise, which had an impact on knock sensor registers.
Thread Starter
Senior Member
Joined: Feb 2017
Posts: 392
Likes: 9
From: Australia
W202 C43 1999
Did you try to diagnose the car while driving it..?,,
it may helps to narrow the issues,
last month, i did swap for my friend, we forced losing power at high idle,
diagnose the car so many times, no codes founded..!,,
after that, we decided to diagnose the car while driving, after around "10" minutes, ECU deducts wrong signal back from knock sensor bank [2/R]..?!?!,,
replaced the two knock sensors, bingoooooooo, everything comes sooo great..
-;ZAYED;-
it may helps to narrow the issues,
last month, i did swap for my friend, we forced losing power at high idle,
diagnose the car so many times, no codes founded..!,,
after that, we decided to diagnose the car while driving, after around "10" minutes, ECU deducts wrong signal back from knock sensor bank [2/R]..?!?!,,
replaced the two knock sensors, bingoooooooo, everything comes sooo great..
-;ZAYED;-
Thread Starter
Senior Member
Joined: Feb 2017
Posts: 392
Likes: 9
From: Australia
W202 C43 1999
No bro., if they're less sensitive, will NOT put them,
as you know; knock sensors are the heart of Engine, can't joke with them, isn't..?!?,
they are better price than "M112/M113" sensors, and i like how bend of the EV1 connectors, more carving for connector plug..
you can go with "M112/M113" sensors, no problem with that, but in my case; they're NOT available around me,,
and IMO; they're not deserve the price, compared to "M156" sensors..!!
-;ZAYED;-
as you know; knock sensors are the heart of Engine, can't joke with them, isn't..?!?,
they are better price than "M112/M113" sensors, and i like how bend of the EV1 connectors, more carving for connector plug..
you can go with "M112/M113" sensors, no problem with that, but in my case; they're NOT available around me,,
and IMO; they're not deserve the price, compared to "M156" sensors..!!
-;ZAYED;-
also purchased brand new intake manifold, PIERBURG 7.22671.06.0 / 113 140 07 01
Thread Starter
Senior Member
Joined: Feb 2017
Posts: 392
Likes: 9
From: Australia
W202 C43 1999
Something really strange lately though...
i have had some health issues and spent a week in hospital, the car was not started for over 3 weeks, i expected it would run like a total dog, but it actually ran better than it has in a very long time.
I cant explain that at all.
i have had some health issues and spent a week in hospital, the car was not started for over 3 weeks, i expected it would run like a total dog, but it actually ran better than it has in a very long time.
I cant explain that at all.
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MBWorld Fanatic!
Joined: Feb 2010
Posts: 1,506
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From: Bolingbrook Illinois
1999 C43 Amg
"Something really strange lately though...
i have had some health issues and spent a week in hospital, the car was not started for over 3 weeks, i expected it would run like a total dog, but it actually ran better than it has in a very long time.
I cant explain that at all."
I believe this, I had my car parked for a week. Didn't get started not once. When I did go start it and drove it I couldn't believe how good and how fast it drove. I didn't disconnect the battery either so wasn't that the ecu reset. And it continues to drive very well..
i have had some health issues and spent a week in hospital, the car was not started for over 3 weeks, i expected it would run like a total dog, but it actually ran better than it has in a very long time.
I cant explain that at all."
I believe this, I had my car parked for a week. Didn't get started not once. When I did go start it and drove it I couldn't believe how good and how fast it drove. I didn't disconnect the battery either so wasn't that the ecu reset. And it continues to drive very well..
Thread Starter
Senior Member
Joined: Feb 2017
Posts: 392
Likes: 9
From: Australia
W202 C43 1999
Thread Starter
Senior Member
Joined: Feb 2017
Posts: 392
Likes: 9
From: Australia
W202 C43 1999
Well it wasnt all in my head, drove the car today and it ran like usual, there is no question it was considerably more powerful last time, for just that one off day.
The way it revs up you would think the timing is retarded abit.
The way it revs up you would think the timing is retarded abit.
Thread Starter
Senior Member
Joined: Feb 2017
Posts: 392
Likes: 9
From: Australia
W202 C43 1999
But having said that, weather was fine both times i have taken the car out.
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Likes: 36
maybe car gets reset by it self not driven for long time?
or you maybe forgot how it drove last time you drove the car and now it behaves differently with a new sense of feeling from you?
or you maybe forgot how it drove last time you drove the car and now it behaves differently with a new sense of feeling from you?
Last edited by KJI3jflarryfe93; Mar 20, 2018 at 02:57 PM.
Thread Starter
Senior Member
Joined: Feb 2017
Posts: 392
Likes: 9
From: Australia
W202 C43 1999
I've put more than 100,000klms on this car in the last 3 years, so i know exactly how it starts and runs.
Last edited by W202AMG; Mar 21, 2018 at 08:19 PM.
Thread Starter
Senior Member
Joined: Feb 2017
Posts: 392
Likes: 9
From: Australia
W202 C43 1999
Starting my E55 cold used to result in a nice big growl, the C43 was the same when i first got it, but cold starts on it now are like there is not enough fuel pumped in at start, fuel rail is up to pressure and holds fine.
MAF is new, 02 sensors are 12 months old, coolant temp sensor is 12 months old, cam and crank sensors are fine. Disconnecting battery over night does not change this either.
The ESL is new, but still have all 3 original keys and key reader, id be suprised if that had anything much to do with it though.
MAF is new, 02 sensors are 12 months old, coolant temp sensor is 12 months old, cam and crank sensors are fine. Disconnecting battery over night does not change this either.
The ESL is new, but still have all 3 original keys and key reader, id be suprised if that had anything much to do with it though.
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Joined: Oct 2013
Posts: 1,649
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From: New Jersey
1999 AMG C43
Just to throw out some ideas.
fuel pump relay might be old and not sending enough or consistent voltage. Can try flushing the fuel system as well for the rough start.
Poor response could be related to above or maybe worn throttle line.
Looks like you've really replaced just about everything, absent something replaced that may not be working 100%
Scratching my head on this one. Hopefully it's not ecu related.
fuel pump relay might be old and not sending enough or consistent voltage. Can try flushing the fuel system as well for the rough start.
Poor response could be related to above or maybe worn throttle line.
Looks like you've really replaced just about everything, absent something replaced that may not be working 100%
Scratching my head on this one. Hopefully it's not ecu related.
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From: Land of mountains, cheese, chocolate and watches
12' W204 C63 AMG coupe "T-Rex", 12' W451 Smart Fortwo Pulse (99' W202 C43 AMG + Ultima Can-Am sold)
Also throwing an idea, have you changed your fuel filter?
Thread Starter
Senior Member
Joined: Feb 2017
Posts: 392
Likes: 9
From: Australia
W202 C43 1999
Just to throw out some ideas.
fuel pump relay might be old and not sending enough or consistent voltage. Can try flushing the fuel system as well for the rough start.
Poor response could be related to above or maybe worn throttle line.
Looks like you've really replaced just about everything, absent something replaced that may not be working 100%
Scratching my head on this one. Hopefully it's not ecu related.
fuel pump relay might be old and not sending enough or consistent voltage. Can try flushing the fuel system as well for the rough start.
Poor response could be related to above or maybe worn throttle line.
Looks like you've really replaced just about everything, absent something replaced that may not be working 100%
Scratching my head on this one. Hopefully it's not ecu related.
Throttle cable and throttle position sensor are new,
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Joined: Feb 2006
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if your car drives slow like grandpa using a walker?
it could be clogged injectors not giving enuff fuel?
have you tried with a bottle of wich brew Motul cleaner poured in your tank when you're low on fuel below 30 litres?
low on fuel gives you a higher cleaning concentrate.
maybe you have a vacuum leak somewhere giving you issues?
it could be clogged injectors not giving enuff fuel?
have you tried with a bottle of wich brew Motul cleaner poured in your tank when you're low on fuel below 30 litres?
low on fuel gives you a higher cleaning concentrate.
maybe you have a vacuum leak somewhere giving you issues?
Last edited by KJI3jflarryfe93; Mar 22, 2018 at 07:45 AM.
