Hi there
OK the little French car is doing what French cars do, being temperamental.
It has not being used much over last couple of months, anyway I took it out last week and it was fine.
Drove it yesterday and morning and I could swear there was a minor hesitation at steady state throttle or partial loads but dismissed it and in afternoon it was none existent. Then driving home it was certainly hesitating, felt like a coil pack / HT lead down but very intermittent.
Drove to work this morning, all fine, then at lunch hesitating, so decided to swap the HT leads out, if anything marginally worse, then fine again. Drove home and it was really bad, when it does it you have to let off and then sometimes its fine or you have to floor it at which point it pulls like normal.
As car was fully serviced (major) less than a thousand miles ago, spark plugs are also new.
The only items left that I did not replace are the:
- Coil Pack at back of engine that the HT leads plug into.
- Map sensor
- Injectors
My guess is its one of the above three, if it helps narrow it down the problem only seems to be apparent on a fully warm engine, car has vpower99 so unlikely to be bad fuel.
To further explain it feels like a missfire (no bangs) or incorrect fuelling, it is intermittent, full throttle seems fine though maybe down on power but that could be placebo. When it is doing it the exhaust is burbling, sometimes happens at idle which makes me think coil pack.
As I've done HT leads, next stop is coil pack as £40 from Renault and very easy to swap out, if still present then I am thinking injectors as doubt map sensor would do this but I suppose I can just disconnect that to try and rule it out, but the way it feels when it happens is as if the engine is not sparking or fuelling right, I'd suggest lean rather than rich as no smell of fuel hence me thinking coil pack or an injector going down. If its an injector I will just buy 4 new and change them all, is Renault best bet or is there an alternative of same quality without the £250 price tag?