Head gasket done now won't start from cold

[Jay_vr6 0]

Just had the head gasket replaced, water pump replaced and also the cam chain done while it was all apart.

Now when starting the engine from cold (over night) the rev counter hits 2K then plummets back down to 0 and the engine cuts out.

If i rev it at 2K for 30 odd seconds then it all settles down and idles at 800rpm.

After it's going I have no other problems at all and it runs like a dream.

 

Haven't had a chance to get my Vagcom back off a mate so can't run the diagnostics yet.

 

Any ideas while I'm sitting here worrying about it ?

[Jay_vr6 0]

just played with vag com, seems the isv is intermitent

 

so if anyone has any ideas let me know

[dr_mat 0]

Check all the manifold hoses around the ISV. It seems unlikely that the ISV has suddenly failed completely, but .. who knows?

Might be worth pulling the ISV off and testing it yourself.

[Jay_vr6 0]

right isv wasn't plugged in, just plugged it in and the engine revs pulsed from 1.5k to 2.5k untill i drove off. I then stopped and it promptly stalled, and again and again.

not sure if this is the isv tuning itself in or is something else the matter and the garage unplugged it ?

[Rob Heath 0]

Get your isv off and clean it with wd-40, might work