Idle Problems

[UCD15R33]

hey

I need help with this badly as this is giving me a headache.At idle when the car is warm and it stops for bout 30 sec at the lights the cars fine but then bout to seconds later the idle bounces from 900 to 400 rpm over and over agian then trys to stall. okay i have cleaned one of my idle valve control units on the top of the car and it didnt work, and we presurised the engine for leak and still nothing. it only happened since we put the new turbo on. So i am asking foe help pls

thankx

[33drifter]

hey

I need help with this badly as this is giving me a headache.At idle when the car is warm and it stops for bout 30 sec at the lights the cars fine but then bout to seconds later the idle bounces from 900 to 400 rpm over and over agian then trys to stall. okay i have cleaned one of my idle valve control units on the top of the car and it didnt work, and we presurised the engine for leak and still nothing. it only happened since we put the new turbo on. So i am asking foe help pls

thankx

hey mate i had exactly the same problem as you untill yesterday, i had it preasure tested aswell but it turned out to be a rubber seal that had deteriorated, it wasnt noticable untill i went for a long and relatively high speed drive up the coast yesterday and completely blew it, im no mechanic so i dont know exactly what its called, but it has something to do with the intake manifold, the rubber seal almost looks like a small head gasket, when i speak to my mechanic on monday ill ask exactly what it was called, but it only costs about $70 to replace on a r33

[MBS206]

Running a pod filter that uses oil?

Clean your AFM with electrical contact cleaner.

Post mods too.

[UCD15R33]

clean air flow and still havn the same trouble with it. it getting annoying i can drive it and give it a boot fullnand its still okay until idle. Mods are a gt30/76 turbo, 3 inch exhaust, standard coil packs, emange ecu, 040 fuel pump,new oragnic clutch.

[33drifter]

clean air flow and still havn the same trouble with it. it getting annoying i can drive it and give it a boot fullnand its still okay until idle. Mods are a gt30/76 turbo, 3 inch exhaust, standard coil packs, emange ecu, 040 fuel pump,new oragnic clutch.

definantly sounds like an air leak

Edited July 15, 2007 by 33drifter

[UCD15R33]

any ideas where but we have ckecked everywhere

[drf76]

any ideas where but we have ckecked everywhere

if its vacumn leak you can spray water along all intake manifold hoses, its a primitive way of finding a leak but always works as it will draw in water and the car will stall or idle really rough, u can use carby cleaner along intake manifold gasket see if thats leaking, however in saying that it sounds like afm meter but u said u have cleaned it, it may be the reversion of air coming back into the afm due to the bigger turbo, have u still got the mesh in the afm ive heard that helps.

[mad082]

we found the problem. we reset the emanage and it went away. i don't know what setting it was in the emanage that was causing the fault because the tuning below about 4000rpm hadn't been touched.