GTRS25T idling issues .

[discopotato03]

S2 GTS25T map sensed has chuggy weak idle and from time to time fixes itself up .

20 yrs old and not sure what to look for ie if there is something obscure these cars do at this age , 162K btw .

All cooling hoses rad pump and belts etc just replaced . Had a sticky around the IAC solenoid and hoses all seems ok .

Going in Tuesday for compression and if necessary leak down tests . Had EV14 conversion in recent past but problem didn't change .

Had Splitfires and new OE coil loom a while back .

Been running 33 GTR fuel pump for some time but not sure if it could be the issue .

Doesn't falter otherwise drives fine though can be prone to revs dropping far enough to stall occasionally .

Any suggestions , cheers A .

      

[Dose Pipe Sutututu]

does it idle richer?

Are you on 98RON? if so.. increase the injector PW see how you go.

What is your fuel pressure at? is the stupid fuel pump relief valve inside the tank still? if so delete that junk.

[discopotato03]

50/50 E70/P98 so ~ E35 .

Will get the fuel pressure checked tomorrow .

Moving fuel and timing settings around doesn't seem to help .

A . 

 

[Dose Pipe Sutututu]

PW should be high enough with that ethanol content.. what's the wideband telling you?

I sense dodgy fuel pressure!

[discopotato03]

Tech Edge WB3A2 .

Problem found today , leak down test shows 80 on no 2 and the rest 160 .

On no 2 most out exhaust but some via crank case .

Bugger .

A .

 

[Dose Pipe Sutututu]

idle it rich, don't worry drive it till the motor goes bang completely....add more boost