High Idle On Startup

[Plan-FAILURE]

so, it could be anything?

sigh

guess ill take it to a mechanic

Idle and missfire problems are always the most fidly to diagnose as there are so many things that could be causing the problem.

I'd be going to a mechanic as well bro.

[ClutchBurndout-:(]

Idle and missfire problems are always the most fidly to diagnose as there are so many things that could be causing the problem.

I'd be going to a mechanic as well bro.

the only reason i havnt gone to a mechanic yet is because it wont be something simple that they can diagnose quickly, i will be up for a hefty check because they will have to spend a fair amount of time checking everything

Edited February 3, 2011 by Clutch

[ClutchBurndout-:(]

and aaron, i stopped by that mechanic yesterday, it seems they are under new management, the place is now called CK auto or something,

[ChEwDog]

my rb 25 s13 starts the same way sometimes up to 2.5 k rpm........ its always done that since i can remember.. it has nothing to do with fuel pump ..got new walbro 255.....

could it be bad timing?

cold start valve? what is that and where is it loated....?

[BOOZTJUNKEY]

Have you tried replacing the tps ? Or cold start valve? If you don't that run ecu for errors and chuck a timing light on it

[BOOZTJUNKEY]

Cold start valve is under throttle body its a pain to get to unless u have done it a few times lol what series 25 do u have I think only series 1 have the a cold start valve series 2 is different any one confirm this?

[89CAL]

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

You didnt specify at what times you were gettng the heavy fuel smells, so I assumed while boosting. Does it smell like there is a fuel leak somewhere? Is your fuel economy really bad?

I highly doubt it is a TPS issue. Try resetting the ECU (If it is a stock ECU) purely because this is a simple test to do.

But if you want to see if its a TPS issue, I think unplugging the TPS will put it into base idle mode anyway, so it will idle without the aid of the ECU (as far as I remember). This mode is usually used to adjust your idle to get it to sit right, so if you unplug the TPS and your idle stays high then it might be an issue with how your idle is adjusted (eg. it is adjusted to high and your computer slowly brings it back down to an acceptable level

Give that a go

[BOOZTJUNKEY]

When I unplug my tps car dies also with afm us that right ?

[89CAL]

I'm not as familiar with R32's as I am with R33's but I think this was discuss a while ago (when talking about adjusting idle) and on the 33's you have to unplug the TPS to get it into base idle mode, but I think the R32's you had to unplug the AAC valve instead to get it into this base idle mode?

I've seen R33's with there TPS not even plugged into anything that still run fine (This is going back a while) so I guess they are much more dependant on the Air flow then throttle position to run

Edited February 3, 2011 by 89CAL

[ChEwDog]

ill check it out and clean it , see if it makes a diffrence....and sometimes my car iddles freakin wierd ...honestly im pretty sure its throwing codes but my ecu light has been riped out ..or something ....when i bought the swapt to put in my s13 the ecu never had a light on it......so i dont know how to check for codes....but it runs good besides sometimes for a split sec when going steddy spedd it cutts off causing a tugging sensation....and when i fully gun it theres a flat spot 5 threw 6 k rpm....i have to let of the throttle half ways and it feels like it acutally goes better that way then fully gunning it.??? but thats another issue now back to the iddle problem....

any pics of how the cold start valve looks like?

o and sometimes my car smells like fuel ...not all the times just at certain times it tends to....lol and i get about 320 miles to the s13 tank..is that bad? sorry for going off topic......

[ClutchBurndout-:(]

fuel smell is at any random time

i dont know what sets it off, and i have no idea where its coming from lol

[89CAL]

Ok so that depends on if it's raw fuel leaking somewhere or if the mixture is becomming rich

Fuel leak is pretty straight forward. I know vs commodore urea get a blocked breather and certain times fume the cabin with fuel lol

Running rich will either be ECU or tune issue. Or air leaving the system after it has been through the afm. So this would occur only on boost if there was a leak or with an atom bov. At Least that's all I can think of ATM

Any more info you can give?

[BOOZTJUNKEY]

I'm pretty sure base idle mode for 25s can be done by disconnecting the tps and 20s can be done by disconnecting the aac valve not 100% tho

Edit wrong thread lol free bump

Edited February 4, 2011 by BOOZTJUNKEY

[ClutchBurndout-:(]

Found out were the smell is coming from, the fuel pumP

[ARTZ]

Found out were the smell is coming from, the fuel pumP

???

[BOOZTJUNKEY]

Was it the large o ring around your acces panel to your fuel pump that was gone and also I just changed my cas and my high idle on start up is fixed no high idle troubles any more hope it helps mate

[ClutchBurndout-:(]

No the big black ring is there.

Were did u get a cas from, hard to replace?

[ClutchBurndout-:(]

???

Wat part of this didnt u understand lol

[BOOZTJUNKEY]

Did you replace the o ring when you did the pump as soon as you remove the inspection panel that o ring swells and does not seal properly and I got a cas from the wreckers for 80 bucks there like 500 or some ridicouls price like that brand new it's only a 10 min job to replace hard part is making sure your timing is correct afterwards you need to put a light on if or hook up a consult

[ClutchBurndout-:(]

i think the o ring was a bit loose, so i tightened that up

when i started the car up without the plug at the bottom of the tps plugged in, it idled at 1500 or so, when i plugged in it went to normal, and then i unplugged while the car was running and the car stalled

does this all sound like normal behavior?