I am hoping someone can shed some light on this problem.
RB20DET in S13.
Cold start, it is shocking. I have to use the throttle to get the car to start like it is some crappy old carby fed car from the 70's. Even with throttle it takes a few goes to get it to run.
When warm the car sometimes stalls out when returning to idle as I pull up at lights/stop sign/etc.
The engine is stock with the only mods being a FMIC, 3" exhaust with high flow CAT and a pod filter. ECU is a Blitz remapped factory item. Cold start has always been an issue but is now worse then ever. Stalling out when returning to idle was initially a problem but was solved by running a better earth to the GTR in-tank fuel pump. Over the last 12 months it has got worse.
The engine was recently treated to some fresh oil, new plugs, new pod filter and the AFM was cleaned. Fuel filter is only 12 months old.
As a side note, I do believe the alternator to be suspect, when turning headlights on at idle the car almost stalls initially and is more prone to stalling out when returning to idle.
Coilpacks were tested 2 weeks ago and were performing well. Injectors and fuel reg are both 22 year old factory items.
Suggestions welcomed.
Cheers,
Ben.