Megane has been driving me nuts today... I had a quick inlet manifold gasket repair to do and a couple of last assembly items and then it was going to be parked and I’d spend the day assembling the orange. No...
Stumbling idle, cycles up and down. Typing vacuum leak I thought, hence new manifold o rings. Nope. Fuck... Swap electric throttle body over, no joy. Fuel filter had to be done anyway, nope. Shit. Plug in computer, it’s got a misfire when it stumbles. Coils swapped, nope. Plugs - no. Shit. Fuel pump sounds like it’s changing tone with idle fluctuations - that’s a shit of a job with a full tank... Oh well, the spare pump from the old car is new and this one is unknown so that’s get swapped. I smell like petrol now... No joy. Double fuck.
Still on the misfire thing, so pull rail and injectors and squirt them out with carb cleaner. Nope. Now im getting annoyed. Cam dephaser can muck with idle, even though it was fine last time the engine ran in the other car. Swap for spare. No. Hotwire it with engine “idling”. Nope, runs worse when activate, so it’s as it’s supposed to be - inactive at idle.
Back to basics. Run throttle body initialisation again. Pull Pcv valve and check, plug hole to see if it was leaking. Do same for brake booster line, canister purge line, MAP sensor. Nope.
I think I can hear an intermittent hiss somewhere when it stumbles and tries to stall. Last thing to try tomorrow is run glue along the seams of the plastic inlet manifold in case maybe it got dropped while it was off the car and split a seam...
After that, dunno... I swapped the crank angle sensor just in case, and then it’s a computer problem. It ran fine when it was last turned off... And it starts well and idles well when cold for about 30 seconds - if the flywheel signal teeth or the computer was bad it wouldn’t run well at all I’d have thought.
So no progress on the orange....