Start, stall. STUCK....frustrated C230 M111
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Joined: Jul 2018
Posts: 2
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1972 280sel, 2001 C230
Start, stall. STUCK....frustrated C230 M111
Hey everyone.
I am at an impasse here that has become very frustrating.
Bought a used C230 Kompressor (W202, M111) that was told had "just ran out of gas" and ran fine, previously.
Got it to start and idle on sight before purchase, although there was no throttle response.
Initially there was a P1580.
Replaced fuel filter right off the bat and no positive results.
Replaced throttle body and still was getting the same results, although without the code because the battery has also been replaced and it won't run long enough to throw a code.
Went through throttle body "relearn" procedure and heard TB clicking as I feel it should, during the process.
Throttle body seems to be responding to the throttle position sensor near the firewall, as I have manually moved it and heard the TB "click" (although not during the relearn process).
No joy.
Checked fuel pressure and it was weak.
Replaced fuel pump (Bosch OEM), relay and fuse, as a matter of course.
Same thing.
Getting power at the relay.
I've done a lot of searching and a lot of reading and can't seem to find a definitive answer.
I apologize if I am missing something in the "search" feature but I am so frustrated at this point, something that seems like it should be a simple fix, turning out not to be.
Thanks so much in advance for any input.
I am at an impasse here that has become very frustrating.
Bought a used C230 Kompressor (W202, M111) that was told had "just ran out of gas" and ran fine, previously.
Got it to start and idle on sight before purchase, although there was no throttle response.
Initially there was a P1580.
Replaced fuel filter right off the bat and no positive results.
Replaced throttle body and still was getting the same results, although without the code because the battery has also been replaced and it won't run long enough to throw a code.
Went through throttle body "relearn" procedure and heard TB clicking as I feel it should, during the process.
Throttle body seems to be responding to the throttle position sensor near the firewall, as I have manually moved it and heard the TB "click" (although not during the relearn process).
No joy.
Checked fuel pressure and it was weak.
Replaced fuel pump (Bosch OEM), relay and fuse, as a matter of course.
Same thing.
Getting power at the relay.
I've done a lot of searching and a lot of reading and can't seem to find a definitive answer.
I apologize if I am missing something in the "search" feature but I am so frustrated at this point, something that seems like it should be a simple fix, turning out not to be.
Thanks so much in advance for any input.
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Joined: Nov 2015
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From: Westcoast/Interior
02w163ML500 / 97w210E50AMG / 99w202C230k / 95w124500e-wip
Many of the members that owned w202s have either moved on or possibly on other forums, hence the possible lack of timely response. Do you have any fuel pressure readings from your scanner?, as you said the pressure was low.
Did you check your MAF? Dead? Oil in the MAF or intake side?
Get some CRC MAF cleaner and cleanout the MAF and pipe assembly.
https://www.mbslk.de/files/artikel/r170_fehlercodes.pdf
Junior Member
Joined: Dec 2017
Posts: 46
Likes: 9
1999 C230K
Are you saying the car idled before but now won't start?
Check your fuel pressure with the ignition on/ engine off and ignition on/ engine on. What are the values? If both low, based upon what you've done so far, if could be the fuel pressure regulator. The fuel pump can make a lot more pressure than is needed. The regulator maintains the correct fuel pressure by bleeding off the excess and returning it to the fuel tank. A bad regulator, although pretty rare, can bleed off too much pressure. A pressure drop while running usually points toward either a clogged fuel filter or a kinked line. Since you've already replaced the filter I suggest you look at the metal fuel lines. A kink or crushed line can be easy to spot if you're looking for it.
If you get the engine running use an OBDII reader to get your throttle body values. It should change when stepping on the accelerator. What is it showing?
Even with the engine not running some OBDII codes should be stored. Do you have any of these?
A noted by khomer2, cleaning the MAF is always a good idea. It's cheap, easy, and can solve a lot of problems that show up elsewhere.
Check your fuel pressure with the ignition on/ engine off and ignition on/ engine on. What are the values? If both low, based upon what you've done so far, if could be the fuel pressure regulator. The fuel pump can make a lot more pressure than is needed. The regulator maintains the correct fuel pressure by bleeding off the excess and returning it to the fuel tank. A bad regulator, although pretty rare, can bleed off too much pressure. A pressure drop while running usually points toward either a clogged fuel filter or a kinked line. Since you've already replaced the filter I suggest you look at the metal fuel lines. A kink or crushed line can be easy to spot if you're looking for it.
If you get the engine running use an OBDII reader to get your throttle body values. It should change when stepping on the accelerator. What is it showing?
Even with the engine not running some OBDII codes should be stored. Do you have any of these?
A noted by khomer2, cleaning the MAF is always a good idea. It's cheap, easy, and can solve a lot of problems that show up elsewhere.
