Help please! wont rev past 2000rpm no accelaration
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 29
Likes: 0
From: melbourne australia
w203 c200k, r33 GTR,
Help please! wont rev past 2000rpm no accelaration
hey guys,
i have a 88 300ce, and my car has started to give problems, thought is was the fuel pump, so have replaced that recently, but once warm my car doesn't seem to rev over 2000rpm, as soon as it gets there or when i put any sort of load on the throttle its seems to misfire pretty bad and wont accelerate!
have changed the plugs also as i thought that was causing the misfire. but no help.
i don't want to keep throwing parts and money at the problem.
any one have any input? could it be the MAF or anything like that?
thanks in advance
i have a 88 300ce, and my car has started to give problems, thought is was the fuel pump, so have replaced that recently, but once warm my car doesn't seem to rev over 2000rpm, as soon as it gets there or when i put any sort of load on the throttle its seems to misfire pretty bad and wont accelerate!
have changed the plugs also as i thought that was causing the misfire. but no help.
i don't want to keep throwing parts and money at the problem.
any one have any input? could it be the MAF or anything like that?
thanks in advance
MBWorld Fanatic!
Joined: May 2005
Posts: 2,494
Likes: 17
From: REHOBOTH BEACH DE
88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
hey guys,
i have a 88 300ce, and my car has started to give problems, thought is was the fuel pump, so have replaced that recently, but once warm my car doesn't seem to rev over 2000rpm, as soon as it gets there or when i put any sort of load on the throttle its seems to misfire pretty bad and wont accelerate!
have changed the plugs also as i thought that was causing the misfire. but no help.
i don't want to keep throwing parts and money at the problem.
any one have any input? could it be the MAF or anything like that?
thanks in advance
i have a 88 300ce, and my car has started to give problems, thought is was the fuel pump, so have replaced that recently, but once warm my car doesn't seem to rev over 2000rpm, as soon as it gets there or when i put any sort of load on the throttle its seems to misfire pretty bad and wont accelerate!
have changed the plugs also as i thought that was causing the misfire. but no help.
i don't want to keep throwing parts and money at the problem.
any one have any input? could it be the MAF or anything like that?
thanks in advance
Rule out the MAF only because you don't have one
What was the condition of the plugs that you removed ?
Very important in order to read what cylinders may not be firing.
Have you also replaced the cap, rotor, wires and checked the coil ?
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 29
Likes: 0
From: melbourne australia
w203 c200k, r33 GTR,
check the wires doesnt seem to be that, i have a feeling its got something to do with the fuel not the ignition, kinda sounds like it running out of petrol.
Senior Member
Joined: Jun 2006
Posts: 303
Likes: 1
From: Northern California
It changes all the time
Rotors, caps and even coils are starting to become a problem with the 103s. Also check manifold vacuum at idle and about 2000 UPMs. At 2000 vacuum should be higher than idle. If it's much less, you could have a restricted exhaust or plugged cat if you have a cat.
Junior Member
Joined: Sep 2010
Posts: 35
Likes: 1
From: Philippines
1992 500E, 2000 E55, 1993 964 RSR, 1973 911 RSR Replica, 1959 Lotus Cortina Ogle
hey guys,
i have a 88 300ce, and my car has started to give problems, thought is was the fuel pump, so have replaced that recently, but once warm my car doesn't seem to rev over 2000rpm, as soon as it gets there or when i put any sort of load on the throttle its seems to misfire pretty bad and wont accelerate!
have changed the plugs also as i thought that was causing the misfire. but no help.
i don't want to keep throwing parts and money at the problem.
any one have any input? could it be the MAF or anything like that?
thanks in advance
i have a 88 300ce, and my car has started to give problems, thought is was the fuel pump, so have replaced that recently, but once warm my car doesn't seem to rev over 2000rpm, as soon as it gets there or when i put any sort of load on the throttle its seems to misfire pretty bad and wont accelerate!
have changed the plugs also as i thought that was causing the misfire. but no help.
i don't want to keep throwing parts and money at the problem.
any one have any input? could it be the MAF or anything like that?
thanks in advance
It could be the fuel distributor. Had the same kind of problem with my 300SL I changed the fuel pump, plugs, distributor cap and rotor but to no avail. When I brought it to a certified mechanic, that was when he told me of the problem with the fuel distributor. I found a good used one on Ebay and after I installed it, the car ran well again.
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 29
Likes: 0
From: melbourne australia
w203 c200k, r33 GTR,
It could be the fuel distributor. Had the same kind of problem with my 300SL I changed the fuel pump, plugs, distributor cap and rotor but to no avail. When I brought it to a certified mechanic, that was when he told me of the problem with the fuel distributor. I found a good used one on Ebay and after I installed it, the car ran well again.
changed the fuel distributor but no change. actually went through 3 different ones
will maybe try the rotor
Thread Starter
Junior Member
Joined: Mar 2009
Posts: 29
Likes: 0
From: melbourne australia
w203 c200k, r33 GTR,
hey guys, the ignition system is fine, had it all tested by an auto elec,
this car has me stumped, can anyone help, or im considering changing the motor
this car has me stumped, can anyone help, or im considering changing the motor
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MBWorld Fanatic!
Joined: May 2005
Posts: 2,494
Likes: 17
From: REHOBOTH BEACH DE
88-300CE TWIN TURBO, 99-C43, 05-G55K, 71-280SL, 94-E320 CAB, 08 CLK63 BLACK SERIES
Appears that you have checked spark and a bit of the fuel supply.
Did you measure the amount of fuel that is being delivered to the fuel distributor?
Replaced the fuel filter?
Leaks around injectors?
Take the air cleaner housing off and inspect the air valve and throttle body assembly.
Make sure everything is moving freely as it should.
Put your hand around the rubber boot that connects the two and see if you feel a vacuum leak.
The boot tends to crack with age and can cause a major vacuum leak.
Also inspect all the vacuum lines and do a smoke test if you can.
Troubleshoot everything as it's much less expensive then changing your motor !!!
Did you measure the amount of fuel that is being delivered to the fuel distributor?
Replaced the fuel filter?
Leaks around injectors?
Take the air cleaner housing off and inspect the air valve and throttle body assembly.
Make sure everything is moving freely as it should.
Put your hand around the rubber boot that connects the two and see if you feel a vacuum leak.
The boot tends to crack with age and can cause a major vacuum leak.
Also inspect all the vacuum lines and do a smoke test if you can.
Troubleshoot everything as it's much less expensive then changing your motor !!!
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