Hi I have a missfire from my car at Idle. When in motion all seems okay but when at idle the car shakes around (like the wind is hitting it) and the exhaust garbles along with the missfire.
It is stage one tuned with a Milltek Cat Back system, remap and carbonio. I've had the throttle body cleaned and reset and recently changed the diverter valve at the top of the engine due to the old one leaking/hissing.
The car has been in today and been serviced along with new plugs. The fault codes have been read and are as follows:
18062 – Please check DTC Memory of Instrument Cluster
P1654 – 004 – No signal / communication – Intermittent
(If it helps I recently took the ECU Fuse out by mistake!)
17544 Fuel Trim BANK 1 (Add) System too lean
P1136 – 001 – UPPER LIMIT EXCEEDED – MIL ON
16891 – IDLE CONTROL SYSTEM RPM – HIGHER THAN EXPECTED
P0507 – 001 – UPPER LIMIT EXCEEDED – INTERMITTENT
17705 – PRESSURE DROP BETWEEN TURBO AND THROTTLE VALVE (CHECK D.V.!)
P1297 – 001 – UPPER LIMIT EXCEEDED
16684 – RANDOM/MULTIPLE CYLINDER MISSFIRE DETECTED
P03000 – 008 – IMPLAUSABLE SIGNAL
16685 – CYLINDER 1 – MISSFIRE DETECTED
P0301 – 008 – IMPLAUSABLE SIGNAL
16686 – CYLINDER 2 – MISSFIRE DETECTED
P0302 – 008 – IMPLAISABLE SIGNAL
Also, the CAT does appear to glow quite a bit!
I only use 99ron super unleaded fuel.
Any advice or suggestions would be most welcome!
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Hello my friend,
You have the classic
crankcase breather valve problem.
Its a
valve that is inside a T piece pipe near your oil filter/under manifold
Basically your car is running lean at idle when you stop, a
valve doesnt close and your engine is flooded with air, and not enough fuel, hence jerking, also because of this problem it will have broken your Pressure regulating
valve (PRV) black disc at the back of the engine (£25) that is causing the pressure drop between the turbo and throttle
valve, I went through 3 or 4 of these whilst I had the problem
http://www.ecstuning.com/Search/Cran..._Valve/ES5957/
http://www.ecstuning.com/Search/Cran...alve/ES258895/
Do a search on
crankcase breather valve and you will find a thread I made a while back
Took me over 6 months and £600 to fix it, if I had known the fault straight away looking at £50 all in, aslong as you dont break any of the brittle rubber pipes attached to the
breather valve, might be an idea to change them aswell
Audi charged me £280 robbing feckers
PRV £25
Breather valve £20
New clips etc etc £5
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Update - SORTED!!!
Big shout to Balckpool1974 - without you I would not have solved this, nor would my garage and nor would my wallet!
I located the
valve (hidden inside the t-junction pipe beneath the intake manifold) and after some effort getting between al the other hoses and pipes (thank god I have skinny wrist's!) I manage to remove the old one and fit the new one. The car now runs as though it is brand new and is certainly a lot quicker!
The old one had broken. The flap inside had collapsed and basically remained open at all times from when I can see. I took a photo of the old and new next to each other to help anyone else in the future as below.
If you decide to do this repair yourself the Part Number is 035 103 245 G and is currently £6.70 + VAT. If you are off a big build I will say that there is not much room to do this job - you really have to get between a lot of pipes and hoses all very close together in a small space without much sight of the object - you can remove the other hoses but this will all take a long time. Make sure you allow your engine a few hours to cool down as well.
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LET ME KNOW IF YOU NEED ANY HELP IDENTIFYING THE LOCATION OF THE VALVE!!
