For the past two weeks I have been redoing and fixing all wires running through the engine bay . The wiring loom was a mess . I found several cracks and cut wires

Since the inlet manifold was out ( in order to gain access to the wiring loom running under the coils ) I decided to clean and polish both manifold , inlet manifold where all 3 butter flies are attached and the GREEDY elbow

So after we put all back together the car fired straight away but I cannot drop the iddle.

On the first attempt the iddle was 3.8K rpm and after playing with a few screws I found positioned on the monifold I managed to drop it to 2800 rpm

The iddle is set in the ECU ( APEXI PFC) round 1200rmp and before taking the car apart it used to flactuate between 1000 and 1500rmp

Now I cannot get anything lower than 2.8K rmp.

What am I doing wrong? Silimar problems you may have encoutered and solved??

All help is welcome

Thanks

 

are you sure that idle is set to 1200?? btw, why so high??

If you have idle 0 in each cell and O2 and Idle-IG Control = off the idle is a result of the hardware setting in close connection to the timing.

recheck this.

If it won't work, try to do this:


DAMN!Nice idle settings

regards
Marc

 

are you sure that idle is set to 1200?? btw, why so high??

If you have idle 0 in each cell and O2 and Idle-IG Control = off the idle is a result of the hardware setting in close connection to the timing.

recheck this.


Yes I am sure its set at 1200 because I had a look into the commander settings. I dont have datalogin in order to investigate more but I could try what you said about
idle=0 and 02-idle-ig = off

Your settings could be fine but my car is running on 550s primaries and has aggressive porting. Would this make a difference in settings?

The problem is not electical because all I did was remove the manifold , repair the harness , polish the manifold and fire up the car

If there was an PFC setting problem it should have happened before removing the manifold

What about the possition of the TCS. I saw you can play around with it. Does the position affect how the car behaves?

 

You have a large vacuum leak. Air is getting into the engine, either the throttle plates aren't fully closed or some other spot past the throttle plates is open to atmosphere pulling in air.

I guarantee you that's the problem.

Dale

 

^ was just going to say that,,, when i put on my uim i put a bracket that holes the throttle cable on the inside of the manifold instead of outside (was first time i took it off and put back on).. the bracket was very thin but still just that small vacuum leak caused it to idle at like 3k or so

 

Dale you where right. The throttle butterflies where not closing properly , especially the single smaller one. We also calibrated the TPS using the PFC Commander volt readings and now I have a healthy 1000 rpm iddle

Thank god...