Hi all, finally got my car running after re-building and I have a couple of issues I need advice over, most importatly it hunts very badly on idle, from 650 ish up to 2600 ish, now the engine has been streetported, the turbos have been converted to non sequential, fitted front mount, got 550 primaries and 1600 secondaries, 260 ltr an hour fuel pump, hks 80mm downpipe, removed secondary butterflies, airpump etc and done full blank off procedure, apexi power fc has been mapped by Pip to rev max 5100 and just 0.5 bar of boost for running in, have checked everything for airleaks and cant find any if I adjust the idle screw it either idles solid at 2800 or goes back to hunting so I am stumped any advise would be gratefully recieved as need to MOT it and Tax it so I can run it in ASAP thanks in advance, Ade :Thumbs-up
One cause for hunting is when there is not enough fuel in the idle and low rpm cells, needs more fuel adding in the map
Sounds like a major air leak from somewhere.
Regards
Carl
Your only in wolverhampton, Take it back to pip and get him to sort it.
My bet is you have your car back sorted in an hour
5100 rpm run in? thats way to high, only go to 3000 bud else ul be buying another engine lol
Thanks for the replies guys, the ecu was mapped off the car just sent it to Pip and he sent it back with the run in map on it, I havnt reved it passed 3k either but it is a pain having this hunting problem, will search harder and see if it is an air leak, thanks again :Thumbs-up
The other thing that can affect the idle is the air bypass valve,try disconnecting the electric connector to it,then manually adjust the idle.
Regards
Carl
Quote from: interloper393;5495435100 rpm run in? thats way to high, only go to 3000 bud else ul be buying another engine lol
thats too low 3K , 5k is about right , a lot people run in after only 100 miles anyways lol
Quote from: R1Dude;549548Thanks for the replies guys, the ecu was mapped off the car just sent it to Pip and he sent it back with the run in map on it, :Thumbs-up
ahh so it was mapped off the car, if you find no leaks then my money is on the cells needed the fuel adjusted, I take the whole car back to Pip to check the AFR
Quote from: BlitzBoy;549551thats too low 3K , 5k is about right , a lot people run in after only 100 miles anyways lol
running in? whats that. just belt it. never failed me yet :Thumbsup!
My best running in period was 20 metres straight on the dyno 450rwhp job done, a couple of years ago lol
Id say it was an air leak , check the lower inlet gasket for something as big in change of revs, does it change once warm? did you adjust the idle with the diganostics jumped?? and what idle is on the pfc?
Hi all, found the problem, slightly embarrasing, forgot I had given my PCV valve to my brother and had replaced it with a straight piece of pipe so it was basically a huge air leak!! silly me, ahh well lesson learned, thanks again for all advice :Thumbs-up