MB C320 203.264 rough idle problem
2142 Views 2 Replies Latest reply: 2015-04-15 15:50:55
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Level 1
(5) points
I have a nightmare of a car. It came in with misfires on cylinders 2+5. I replaced coils and wires. Upsold a rear main, valve covers, and plugs. Finished the car it ran fine. Sent it home. 3 days later it came back she complained we did not fix anything because its still running rough. No codes what so ever. I went through pulled all the plugs again, ohmed coils and wires, fuel pressure is good , tried throwing a MAF at it, cleaned throttle body, smoke tested intake, cleaned EGR. I can't find a single thing wrong! It runs perfect during warm up but almost stalls once hot. Any suggestions? Wish I had an oscillascope to check injectors but I dont. -
Level 1
(3) points
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Level 7
(1143) points
this is the kind of question for a tech forum but not a 'diagnostic tool' forum like this one, even though we are car techs. Better adjusted for help are the likes of iat.net or maxifix on the maxisys
For this once I have a few suggestions for you to check; O2 sensor working fine (if any) and ECT, IAT, Oil temp, scoped crank and cam signals. I will NEVER just say 'change this' or 'change that' , on a forum you will never get more then good directions (we don't see, hear and feel the car)
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