Unhappy Idling from cold

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17-10-09, 18:45
wrinx

Unhappy Idling from cold
Still having problem with the idle and would welcome your suggestions...

I need to check the MAP sensor pipe but not convinced that's at fault because it idles fine when warmer, after about five minutes.

Works done so far...
1. water temp sensor replaced
2. valve clearance set
3. ICV cleaned...twice!
4. found the source of the hissing (not inlet related)
5. system appears to be without leaks
6. new air filter
7. new NGK BPR7EIX iridium plugs
I'm wondering about wear in the ICV and the measurement of the little nut on the end :roll:

Could it be my C&B inlet cam is causing the problem, idle when warm is still lumpy but I can't recall what it was like before?

Might look at replacing the plug leads...any other ideas?

wrinx
17-10-09, 19:04
wrinx

Forgot...car is running a Squadra chip and 97ron fuel..

wrinx
17-10-09, 21:00
arjunior45

Squadra chip as far as I recall is just for an oem engine/car cams included.

Which C&B cam you have? Is it possible you have fueling problems due to the chip or timing problems with the cam setup you use?
17-10-09, 21:12
wrinx

Yes...it is very possible :roll:

From memory it's the "medium street".

Think I need to hurry up and buy a new turbo and get it remapped :eek::doh:

wrinx
17-10-09, 22:16
AlfaJack

I think it's the map too.
17-10-09, 23:21
wrinx

Yeah, seems the most likely culprit :roll:

Probably not getting enough fuel on cold starts...it has become a little harder to start too (crank sensor on my list to do!).

wrinx
18-10-09, 12:56
arjunior45

Quote:

Originally Posted by wrinx

Yeah, seems the most likely culprit :roll:

Probably not getting enough fuel on cold starts...it has become a little harder to start too (crank sensor on my list to do!).

wrinx

don't you have an AFR meter?
18-10-09, 18:24
wrinx

I do, not fitted yet...although it's only a basic one, not wideband.

wrinx
19-10-09, 12:01
arjunior45

even a narrow band AFR should be able to indicate bad fueling at idle or constant speed.
I think at least.
19-10-09, 15:12
wrinx

Yes, it will just say good or bad, which is all I wanted.

Getting p155ed off with my Q4 at the moment...coolant out of the expansion bottle at 95degrees, need to check head gasket :(

Think the second hand turbo has blown too :roll:

Seem like I fix one thing and two more go wrong!

wrinx