engine cut out after booting it

[s2_southwest]

Drive the car normally is fine, after i boot it in pretty much any gear and then let the engine revs drop to idle (i.e roll upto a set of lights) the engine cuts out, but will start again.

Is this something to do with the ISV?

[Rusty]

Just some ramblings:-

Give the ISV a good clean, I use carb cleaner and spray it through until everything is clear.
Clean the MAF
Check the TB plug and switch
Try and pull codes to check everything else is fine.
Check for boost leaks, loose pipes etc.

If it re-starts then you'd think that the speed, crank and cam sensors were ok

[Rusty]

I also had a problem when the ECU wasn't earthed to the mianifold correctly, check the bolts there are tight and corrosion free.

[s2_southwest]

Andy, ive just fitted a new intercooler, all boost pipes are good, no leaks, recently replaced all the vacuum hoses, all good, recently removed the PCV system for a catch tank, i have had the inlet manifold off and TB so i will check all those connectors again and the two or 3 earths that go to the manifold. I havn't cleaned the ISV yet, but will do that tomorrow along with the MAF.

Thanks for the pointers

[s2_southwest]

i will also run up vag com tomorrow see if there are any faults, will run it in the car while i try and get it to cut out

[Rusty]

Leak on th inlet maifold? How's the idle?

[s2_southwest]

idle is spot on, i put on a new IM gasket when i replaced it so it "should" be fine. Think it might pay to go round and re tighten everything!

[terrybullwon]

I had this same problem when i was running a 3B, Happens more when the inlet temperatures are higher? and only after a hard sprint?

Sorry to say that i never got to the bottom of it, Ross had the same problem with his iirc

[terrybullwon]

Also to add, all three of us were using cone filters.

[denniselbows]

i had the same problems on my 3b you could rev the engine and it would stall. cleaned the isv still did it what sorted my was after i cleaned the tb itself. un did the screews and removed the butterfly valve cleaned all the gunk off it and the body never had a problem since

[Rusty]

The wedge on my TB got removed when I asked a mate to 'clean it'

[denniselbows]

ah yes i remember you saying that have you seen any difference with it gone? or is it to small a thing to notice

[s2_southwest]

TB is clean on mine as ive had it all apart recently. Grr damn 3bs, pain in the ***

[s2_bo]

Hows the boost with the new IC?

[quattro20v]

How's your bypass, could it have a leak.