Today was MOT day for the MR2 after the engine rebuild and things did not go exactly to plan
Checked oil and water, and started the car - all was good. Locked up the house and headed out to the MOT station. Now I paid for a days insurance so I could get the MOT done ready for the car to be sold, so i was banking on a pass, or a few minor bits at most.
I stopped at BP to put £10 of the good stuff in and pump up the tyres. The car was just up to temp, and whist waiting to get fuel, she was idling really rough, and cut out. Car restarted no problem, and I continued to fuel up.
On the way to the MOT though, the car was really idling rough. I had to left foot break to keep some gas on at lights, so the engine did not die. When driving it still felt a little rough, but as soon as boost came in, it was pulling fine. I immediately thought that I must have a vacuum leak, but I stopped checked an it all looked connected (all new hoses, so they should not be broke).
Got car to MOT station and it would not tick over at all ! left it with them. They then called me about 20 minutes later to say that they cannot get in the car. i told them to hold the immobilizer button to open the door, and it will start as long as its within about 30 seconds of opening the door. So they guy gets off the phone and goes to try again. 20 minutes later, another call - nope, they cannot open the door.
so i walk back, and get the car started for them (the fob was playing up, looked like the battery had moved - maybe the keys have been droped 
)Anyway - now I get told ive missed the MOT slot, and would have to wait as they are packed out, and have no room now. Long story short I ended up walking home so i could get my car to go to work, and left the MR2 with them to MOT.
So. background done !
Any ideas why I would get rough idle, but only when up to temp ? I did see the ECU light flash up a couple of times, so I might have codes, but I dont have the car atm.
vacuum leak ?
over / under fuel due to some sensor fault ?
this is never ending ......
