Renault scenic misfire!!?

Question:
Had the AA change two coil packs and all plugs then they have given up (but they did a good job spending hour and half helping me - highly recommended you join them) - towed me home, Their is still a misfire on cylinders 1 and 4, will have to take to renault garage. Is this electrical fault or E.C.U problem?? Any advice would be grateful so renault garage doesn't rip me off

Answers:

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Hi

Is it bad mixing oil such as 10W-30 with 5W-30 or mixing brand name?


Sometimes, when coil packs burn out, they spike the ECU, which in turn causes that to either burn out or develope a permanent fault.

my truck belt is squeaking and the belt is pretty brand new whats wrong?


I would swap 2 and 3 injectors with 1 and 4 injectors and see if the misfires follow the 1 and 4 injectors. If not and the misfires remain in 1 and 4 then you could have a spiked ECU.

its not a medalflake paint job,black factory paint on new truck and?


You could also have a faulty crank sensor, as 1 and 4 are at TDC at the same time, the crank sensor could be missing the firing point for 1 and 4.

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Cheers

Whats wrong with my car/transmission?


Geordie

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Have you tried changing the H.T leads, worth trying to change this first as it's very cheap.

alloy wheels?

No. 1 & 4 wires didn't get exchanged did they?

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Coil packs are a problem on these vech did they recode the ecu if they did not that could be your problem.

I just bought a used saturn with 50K miles and there is something wrong with ignition lock, can't move key for

hi,just replace number 1 and 4 cylinder coil packs then your fault will be cured,its easy to do yourself and cheaper,this is a very common problem,or any local garage can do this it is not a main dealer only repair.
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