Hey guys,

I hooked up my boost fooler this weekend, using a 10K pot I grabbed on my way home from work Friday. The install went fairly easily as I had run my wires and sexed all my connections a few days before. I figured sexing the connections would allow me to put it all back stock if I ever wanted/needed to.

Anyway, I hooked it up, and took it for a test drive. Everything ran fine...no codes...10psi at WOT...and about 6 - 7psi while cruising. I was impressed. That was on Saturday.

The truck didn't move yesterday, but this morning on my way to work, the Check Engine light came on. The truck was sluggish, and I had no boost...even when I turned the pot all the way down. So...I pulled over, popped the hood, and hooked everything back up stock. Sure enough...the check engine light went out, and she ran fine all the way to work.

My question is...short of it being as simple as a loose connection, or is the baro seeing a value this morning in the rain/cool weather, that's causing too much of a disparity between it and the MAP?? Is this one of the reasons why the '95 S engines may/may not need a resistor inline with the baro?

Any suggestions would be greatly appreciated.

Jamie

No ideas?

The pot has three terminals, with #2 being the center terminal - it should tie to the SIGNAL wire from the PCM.

#1 terminal should connect to the SIGNAL wire from the MAP sensor.

#3 terminal should connect to common, or ground

PCM has some trouble at start when the SIGNAL wire reads closer to ground - 0v - than normal.

Baro or MAp may be faulty, but '94-'95 S PCM was more limiting with turbo because of the EGR system - increased power\Boost levels could 'blow' the EGR valve open, causing odd symptoms.

Re-connect the pot, start with no offset, try rotating the pot a little, shut it down and restart, and again until you hit the DTC point - mark it and don't adj beyond that point unless you're driving the truck, and don't kill the engine if adj beyond that point..

Thanks for the info. I know I have the terminals connected to the correct wires cause I double and triple checked when I was doing it. I will check them again though.

I'll hook the pot back up and start with it turned all the way down. I just don't understand why it would work fine on Saturday, while I was out for my 30 minute test drive...and then blow chunks this morning within 2 minutes of leaving home.

Aaah...what fun...