EFI fast idle

Post by **Robbo** » Wed Oct 15, 2003 12:42 am

Have GU 4500 efi petrol that idles back to its idle setting very slowly, its causing me to stuff up very slow movments in low over rocks & the like. Starting to realy shit me. Have checked cables etc all move freely. Thanks in advance.

Post by **bogged** » Wed Oct 15, 2003 1:39 pm

Robbo wrote::? Have GU 4500 efi petrol that idles back to its idle setting very slowly, its causing me to stuff up very slow movments in low over rocks & the like. Starting to realy shit me. Have checked cables etc all move freely. Thanks in advance.

Mate of mines is exactly the same... shaitting him to tears too.

Could it be a vacuum leak of some form?

Post by **bazzle** » Wed Oct 15, 2003 2:42 pm

If everything external to computer OK then its in the programme to reduce emms on trailing throttle.

Safari chip will fix.

Bazzle

Post by **Robbo** » Wed Oct 15, 2003 11:11 pm

Thanks but it has a uni chip & have checked for vaccume leaks also sprayed liberal amounts of carby cleaner in butterfly housing while reving but no change. Something else i have noticed is cold fast idle is taking longer to fall to 700 wich is warm idle setting. SNAFU :cool:

Post by **mav** » Thu Oct 16, 2003 5:32 pm

Robbo wrote:Thanks but it has a uni chip & have checked for vaccume leaks also sprayed liberal amounts of carby cleaner in butterfly housing while reving but no change. Something else i have noticed is cold fast idle is taking longer to fall to 700 wich is warm idle setting. SNAFU

does it have the air bypass on the throttle body ?? be carful spraying carbon cleaner in these as it can stuff the air bypass .

Post by **Robbo** » Fri Oct 17, 2003 12:02 am

Will take photo of throttle body drop it on here & you can tell me if its got air bypass.

Post by **DAZZ** » Fri Oct 17, 2003 3:22 pm

It will have a Idle by-pass (IAC valve) Be careful spraying carb clean in these cause it can stuff them. Some throttle bodys have a coating that dosn't like carb clean also.

Post by **Robbo** » Tue Oct 21, 2003 2:05 pm

Can you tell me what the part at the tip of scissors is also the part under the box of matches.

Post by **Robbo** » Tue Oct 21, 2003 2:08 pm

oops here are others

Post by **Robbo** » Tue Oct 21, 2003 2:10 pm

1 more

Post by **Robbo** » Sat Oct 25, 2003 2:26 pm

Anyone know someone with any clues, cos i got a comp coming up & i want to sort it out before i hit it with a knockometer :bad-words:

Post by **mav** » Wed Oct 29, 2003 9:23 pm

the one with the match box on it is the idle air control (iac) which would be the first one to look at, don't know obout the other one.

Post by **Robbo** » Wed Oct 29, 2003 11:27 pm

Thanks mav i think i might pull it off & see if its got carbon & shit in it. Can't hurt to look.

Post by **Robbo** » Tue Nov 25, 2003 1:47 am

Now its hunting and realy starting to shit me.
May have to bite the bullet & take it to Nissan. :bad-words:

Post by **mav** » Wed Nov 26, 2003 8:42 am

how did it go after you cleaned the idle air control and the throttle body, hunting idle usally means one of them is dirty.

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EFI fast idle

EFI fast idle

Re: EFI fast idle

iac

carbon buildup

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