Bouncy Idle, Now won't start

[Jamil]

Hello,

Went to the gym this morning and after getting there and parking the idle speed started bouncing past 2000RPM and back down constantly. It did this for about 1 minute before I turned the car off. I tried restarting it and it wouldn't start. I left it for an hour and came back; same thing.

I had to leave it there. What could cause a bouncy idle and then prevent the car from starting? I've searched the forums and have some idea on what can cause a bouncy idle but I don't know why the car won't start. Appreciate any help!

[Jamil]

I'm getting the picture the Idle Control Valve is the most like culprit, but would it also prevent the car from starting?

[euroshark]

It shouldn't prevent the car from starting...

Unplug it and try.

Have you checked all of your fuses? Check them and double check them, I had the fuse that powers my ICV and the fuse that powers my fuel pump go out in the same week once... What a pain in the ass!

[porsche gt1]

Could be a vaccum leak.

[Mr Deagle]

check the plug on the afm

[euroshark]

Take all of your intake and vacuum hoses off and inspect them too, you'd be suprised where the intake hoses sometimes decide to split open.

[Jamil]

Was the ECU

Hey guys,

Thanks for the replies. It was the ECU, I had it replaced with a used one. Had the ICV cleaned to be sure also. Car runs well now (I'm sure something will come up in a couple of weeks ;) ).

I'm wondering if it's worth changing all the vacuum hoses in the spring as preventitive maintenance. Shouldn't be expensive. Waste of money? Any thoughts?

[Jean]

I got a couple more vacuum hoses to replace myself, they aren't expensive it's just a pita job to do them all that's all and if anything it will only improve your idle , my 2 cents.