vtec69

When i go to start my car when its cold i need to give it gas and let it idle at 2000 rpms for a min or so
if i let go of the gas the car stalls
i thought it was the battery so i got a new one but it still didnt start right up
anyone have any ideas???
TIA
-Brian

Chris y0!

my car idles really high automatically (probably around 2K, i don't have a tach though) when i first start my car in the morning. maybe its an ECU problem?

pkek

my b16 swap does this too....I have a mugen program and my motor is an old auto so whats up?

euclid

i am idleing at nearly 4k in the morning, but it was like 4degrees today and yesterday up here in the north east. you might be higher than 2k, i dont know why that happens.

vtec69

u must not understand
it wount turn over unless i give it gas and make it idle at 2k

-Brian

tominos

the reason why it idles higher when the engine is cold is so that the engine can warm up quicker. once it reaches normal operating temp, the idle should return back down to normal. by the way, is your car carbureted? what car/year? maybe you're not getting enough gas, when it's cold, the engine runs richer.

vtec69

i have fuel injection and the motor is an ls/vtec and i have a walbro 190 fuel pump

Chris y0!

yeah, but what im saying is that you shouldn't have to make it idle that high, the car should idle that high by itself.

vtec69

but if i dont give it gas it just stalls out

Chris y0!

i don't know dude... i would just tune the cold idle speed. do i know how to do this? nope. good luck

90accord1

what tobody setup do you have? some of the older tbodys off the tegs did not have a air valve, not sure if thats what the exact name is but thats what its called on my ae86. anyways along side the aicv is the air valve, coolant runs through it and it has a spring in it with wax. whent he coolant get warms the spring releases or somehting and the idle goes down. either your missing this or it could be damaged. it should be located on the underside of the throttlebody. just a possibility.


[Modified by 90accord1, 11:46 PM 1/22/2003]

EpDarks

Perhaps you need to tighten your throttle cable?

Maybe worth a try to clean out your injectors/fuel system.

Good luck man.

tominos

whats your fuel pressure at? when your car is cold, it should idle at about 1500-2k.

94hondaLS

dude cars do this normally in the morning. it idles normally when the cars warm right? The computer knows the engine is cold because the signal from the ECT (engine coolant temp)sensor says so. In turn the computer tells the IAC (intake air control) to open the throttle plate open so the engine can warm faster. Just some knowledge for the one that didnt know why cars did this.

94hondaLS

not sure on that one let me get back to you tomorrow. I will go ask the all knowing one. if i were to guess though id say i has something to do with IAC


[Modified by 94hondaLS, 10:03 PM 1/22/2003]

Chris y0!

yeah i know, maybe i should have reworded my first post. i meant to say that my car idles at 2K+ when i cold start it, maybe YOU have an ECU problem.

poo flinger

Check your TPS sensor. Should be .4 volts at idle. .5 at half throttle. Also check the map sensor for any pinched vacuum lines. Check your IAC valve. Make sure the valve inside is all the way tighted.

vtec69

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