High Idle On Startup

[ClutchBurndout-:(]

when i start up the car the idle goes higher than normal and feels unbalanced in the engine, as i start up it will shoot to nearly 2k rpm idle, and to stop it i have to blip the throttle a couple of times to get it to calm down to normal, what causes this?

i cleaned the AAC yesterday, didnt change anything

any other ideas?

[Sunkist]

could be an issue with your cold start or even timing.

An AE86 sprinter that a mate and I used to work on had the timing advanced a little, but for some reason at idle the revs would climb to about 2.5k and then drop to 600rpm, then climb and drop. etc.

he ignored it, and nothing eff'd up yet?

maybe a similar issue.

[ClutchBurndout-:(]

ill have to check out my timing then, any easy way apart from taking the radiator out to see the notches on the crank?

the other thing is, its only just started doing it recently, and i havent touched the car since i bought it

Edited February 1, 2011 by Clutch

[Sunkist]

not to sure with the RB's bud. hopefully other guys can help.

or just take it to a mech, i'm sure alot of mech's in our area have dealt with RB's.

Theres one near hallam station that are pretty good with em, and reasonable to deal with aswell!

[ClutchBurndout-:(]

not to sure with the RB's bud. hopefully other guys can help.

or just take it to a mech, i'm sure alot of mech's in our area have dealt with RB's.

Theres one near hallam station that are pretty good with em, and reasonable to deal with aswell!

near hallam station? thats close by, have an address?

[Sunkist]

near hallam station? thats close by, have an address?

http://maps.google.com.au/maps?hl=en&safe=images&um=1&ie=UTF-8&q=hallam+repco&fb=1&gl=au&hq=repco&hnear=Hallam+VIC&cid=0,0,5927533211543775040&ei=_4lITfjIKoievgP6352VBQ&sa=X&oi=local_result&ct=image&resnum=1&ved=0CA0QnwIwAA

Hallam Service Centre

11 Keppel Dr, Hallam VIC 3803 (03) 9796 4387 ‎

they generally take a look for free. worth a shot?

[ClutchBurndout-:(]

whats the name of the place?

thanks for that, they open on the weekend?

Edited February 1, 2011 by Clutch

[Sunkist]

not sure, maybe sat mornings?

give em a call, they're usually there till late on weekdays workiing away anyway.

I used to get my supra fixed and got alot of good advice from em.

[Trozzle]

No chance of it being fuel pump related? Might be ECU being ghey with the pump and it leaning out = high idle?

[ClutchBurndout-:(]

No chance of it being fuel pump related? Might be ECU being ghey with the pump and it leaning out = high idle?

possible factor, would this also cause heavy fuel smell while driving sometimes? how do i check that my fuel pump is working properly?

Edited February 2, 2011 by Clutch

[Sunkist]

probably arent many ways.

you'd probably want to replace the pump anyway seeing as its been in there for more than 10 years.

[ClutchBurndout-:(]

good point, rough prices?

worth buying my own pump and getting a mechanic to install? or install myself?

[mad082]

highly doubt it will be the pump.

possibly the cold start valve, or could be your AAC valve dicking up (even though you just cleaned it).

[Plan-FAILURE]

Could be...

Cold start valve

TPS (throttle position sensor)

CPS (cam position sensor)

Engine Timing

[mosquitocoils]

Not sure if it's of any help, but I recently swapped my turbo.

Put it all back together including intake, disconnected the CAS and cranked a few times (to build some oil pressure - it's debateable whether this is needed or not, but nonetheless I did it), then reconnected the CAS and started it up.

Wouldn't idle properly at all due to loose intercooler hose, so I fixed that up and started her up again.

Idled smoothly but shot up to 2.5k and slowwwly dropped over about 5 minutes to normal cold start idle.

Like I said, not sure if there's anything in what I did, that's related to what you did, but hey there's my info - hope it helps.

[ClutchBurndout-:(]

Could be...

Cold start valve

TPS (throttle position sensor)

CPS (cam position sensor)

Engine Timing

so, it could be anything?

sigh

guess ill take it to a mechanic

[89CAL]

If it's stock ecu reset it, could help

Also if your running stock ecu and more boost then normal it will dump fuel in when it boosts. My car on stock ecu at around 9-10pso was getting an AFR of 10:1

Worth a try for the 5 mins it takes. If you don't know how just unplug your battery and hold the brakes down for a bit. Play with the switches and stuff. The idea is toget any residual electricity out of the system

[ClutchBurndout-:(]

high idle 89CAL

didnt say anything about it running rich on boost

[BOOZTJUNKEY]

Try adjusting your tps im pretty sure if you rotate the tps clockwise that will lower your idle and anti clockwise will increase idle speed so if your idle is high on startup rotate clockwise and see if that lowers it find a happy medium with it then you could probably fine tune with your aac valve Idle adjustment screw let me no how you go mate

[ClutchBurndout-:(]

Try adjusting your tps im pretty sure if you rotate the tps clockwise that will lower your idle and anti clockwise will increase idle speed so if your idle is high on startup rotate clockwise and see if that lowers it find a happy medium with it then you could probably fine tune with your aac valve Idle adjustment screw let me no how you go mate

i cant adjust the tps because my idle is fine at times