hi folks since fitting my new 500cooler and alloy rad my cossie has been idling at roughly 1.2 instead of the normal 800ish mark. Will the above mods result in lower temps so the ecu thinks its a really cold start and keeps revs higher or are they not related?cheers luke

 

Your car is knackerd

Hope this helps

Steve

 

And it's a real one....

 

Cheers mate... Have u had a few to many beers with u lunch today!?

 

Cheers mate... Have u had a few to many beers with your lunch today!?

 

Sounds like there could be an air leak, after fitting the intercooler to me.

 

What hose would that be do u think?

 

1 of 2 or maybe both

Steve

 

just check both are on right and tight
there is only 2
both that come off the cooler
1 to turbo
1 to throttle body

 

also is the coler second hand or new
if second had check it had no leaks its self

 

brand new radtec mate. Would there maybe be a little split in the hose as their original or would it come from where there jubilie clipped on?

 

how would air leaks on the intercooler increase idle speed?

the intercooler is before the throttle body, so not under depression.

 

im no expert mate but i though as the engine would be cooler, the ecu might keep revs up to compensate for temp, doesnt it have different settings for cold starts and adjusts the fuel air etc accordingly??

 

You havent suggested that its a boost hose leak mate, but some others have! you can take the boost hoses off a YB and the idle speed will not change!

your thermostat should not open till over 80degs, depending on type, and the car should be out of cold start by that time. thats the whole point of the stat.

i would suggest you have an air leak somewhere, becuae a petrol engine will not rev without air, so i would pressure test the inlet system (behind the throttle body) and investigated for air leaks, before having the fuelling evalutaed and the base idle adjusted to suit.

the intercooler or rad fitment shouldnt have caused the issue.

does the idle drop to its normal speed if you unplug the ISCV?

 

i havent tried to take the idle controll valve out yet. If i take it out and it idles correctly does that assume the icv is it at fault and how can u pressure test the inlet system. Do u need special tools? Cheers luke

 

dont take the iscv out, just pull the plug off it, if the idle drops, then the iscv is being told to open by the ecu, there are a few various reasons this can happen.

to blow the inlet up with air we have a special fitting, which im sure you could make up, take it up to 3 bar.

otherwise if all is well, just get the fuelling/boost checked and set up, and reclaibrate the idle speed via the throttle body screw.

 

ok james cheers. Where's the icv located on a saph cossie? (I.ve never had any issues with idle before so never needed to know) many thanks luke

 

R/h side of engine mate,cylindrical tube with a plug on top.

 

cheers mate. Is it coloured? Right side as in opposite side to turbo

 

On top the throttle body mate with a grey top and usually a grey plug

 

Grey thing on top of throttle body fella

 

cheers lads. Nice pic by the way, spotless