2.9 Pulley, 60# Injectors, Trifecta Tune

1. P0069
2. P2229
3. When shifting to neutral, RPMs rise usually to 2k, but seen as high as 4k. Car will also keep a speed on its own without being on the gas pedal

Any ideas?

 

vacuum leak?

 

The funny thing is it doesn't start doing number 3 until running for a bit. It idles fine, no bouncing or anything. It's just when throwing it into neutral until you get down to like 5mph or less it drops back to 850 and stays there.

Kinda like how on stock cars throwing it into neutral will coast on like 1000rpm until settling back down to 750 or whatever.

I double checked all the vacuum lines disconnected from the blower. I believe the only thing that could be leaking would be the supercharger gasket, if it was. 168k on the gasket.

Tune related?

 

Did you look up what those codes mean?

What's on the custom tune?

 

Likely a bad baro sensor, unplugged baro sensor or the map sensor is scaled incorrectly

 

Update:

Pretty sure I was getting those codes, because I had the SCIP and BARO harnesses switched. :face palm:

I didn't take it out for a drive yet to check for the thing about revs in neutral, but here's a clearer statement about that..

when you push the clutch in after cruising, instead of the rpm's dropping, the raise to about 3-4k, and hold there untill the car comes to a complete stop, at which time it drops to normal idle. I can downshift and engine break to keep the rpms down, and then it doesnt do it, but if i just push the clutch in and stop with the breaks, the rpm's go up to about 3-4k(but never over 4) untill the car comes to a complete stop, and everytime like clockwork they instantly fall to normal idle(about 900rpms).

Pretty much runs perfect other than that.

 

Yeah, the switched harnesses were also my problem for the drivability issue.
Found out the right colors of the wires on RLFs.

 

Good to hear you got it figured out. It's great what can happen when you plug in the correct sensors to the correct connector.

 

Maybe GM shouldn't have put the same size connector on the same power rail for sensors right next to each other.

Also surprised that information isn't posted here, but on the RLF.