Toyota MR2 Running Problem

[msmith0592]

Hello,

I have a MK2 MR2 and have had some problems with the car.

It cut out and failed to start a week ago. It was diagnosed as a fuel blockage so I replaced the filter which then made it run.

The car worked fine lower down the rev range but it wouldn't rev above 4k. I replaced the spark plugs which looked like they had seen better days.

This still hasn't fixed the problem. About 12k miles ago it had a new rotor arm, distributor cap and HT leads.

10k miles ago the cambelt, waterpump and tensioners were changed.

Any suggestions?

[Liamsaid]

Have you checked to see if there are any error codes stored? All you need to do it is a paper clip to link two pins in the diagnostic connector in the engine bay.

Might also be worth looking for vacuum leaks, especially around the aics, as that operates a butterfly valve in the inlet track at around 4k rpm.

Otherwise it could be the fuel pump getting weak, might be worth getting a pressure tester on it.

Edited by Liamsaid on Saturday 13th January 19:15

[msmith0592]

Nothing stored on the diagnostic.

I've checked the variable inlet. The butterflies operate fine when revving it

[Liamsaid]

Can it get above 4k rpm if you rev it in neutral?

If we ignore the fuel delivery problem, the next thing to check would be the igniter for cracks and the quality of its earth, as it earth's through its metal mounting bracket, and corrosion to that can cause problems.

It would still be a good idea to get a fuel pressure gauge plumbed in so you can see it while driving. Have you seen the bgb for fuel pressure test instructions?

[MikeyMike]

Did anything appear to precipitate this issue? Driving it hard etc? Could it be that the car is in limp mode? May be worth just disconnecting the battery for 1/2 an hour to reset the ECU then go for a spin.