Lumpy idle v6

kaiser · 28th February 2020, 07:08

I have got a lumpy idle caused by the front right cylinder not coming to the party on my V6 (Cylinder 5) mainly during idle.
The spark plug fires, the injector injects, and compression is fine. (11.5 Bar on cylinder 5 and cylinder 3 for comparison)
I have replaced the spark plug and also swapped the injector just for safety, but the problem sort of remains.
The engine runs well at higher speeds, which is evident when the spark plug lead is removed.
I will put some injector cleaner in the tank and drive a bit with the new injector (which came off my spare engine and has been sitting for a couple of years. I have triggered it and sprayed brake cleaner through it. It gives a fine mist under pressure)
The engine light comes at times and is currently on. No code reader, yet.

Anyone seen anything similar?

28th February 2020, 07:08	#1
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	Lumpy idle v6 I have got a lumpy idle caused by the front right cylinder not coming to the party on my V6 (Cylinder 5) mainly during idle. The spark plug fires, the injector injects, and compression is fine. (11.5 Bar on cylinder 5 and cylinder 3 for comparison) I have replaced the spark plug and also swapped the injector just for safety, but the problem sort of remains. The engine runs well at higher speeds, which is evident when the spark plug lead is removed. I will put some injector cleaner in the tank and drive a bit with the new injector (which came off my spare engine and has been sitting for a couple of years. I have triggered it and sprayed brake cleaner through it. It gives a fine mist under pressure) The engine light comes at times and is currently on. No code reader, yet. Anyone seen anything similar? __________________ Worth his V8 in gold