This just started yesterday. I only have a narrow band gauge, but when I go into boost the gauge reads in the 100's. It usually goes into the 900's. During normal driving it seems to be in the normal range. My fuel pressure goes up into the 60's, so I don't think it's one of my fuel pumps.
Other things a happening, like when I back up my driveway the truck want's to stall. Everything seems to be in order under the hood so I have no idea what could be the problem.
So what do you guys think could be the problem??
Thanks,
Mike

 

Sounds like something in the tune needs to be adjusted.

 

Is it hard to start after the stall?

 

Really? Are you sure its not one jet in the carb sticking?

OP, you REALLY need a wideband sensor. Tuning for FI without one is risky and inaccurate.

 

I agree, but I've been running the same tune for over a year. This just started yesterday.

It started right up.

I think this will be my next purchase.

Thanks guys. What else do you think?

 

You have an air leak somwhere check piping,clamps,hoses.

 

Are you still running a maf?

 

I'll have to check all of my connections. If I had a loose connection, wouldn't that make me run rich?

I'm still running a MAF. I hear speed density tuning is a real pain in the *** if you don't tune yourself.

Thanks

 

I bet your maf is cracked letting unmetered air in.It happens around 10 psi or so if the set up is blow through.

 

Sounds like a possible MAF problem. Check to see if the sensor has power. Its either messed up or the ground has come loose off the drivers side head in back. Could be cracked also as stated above.

also check and make sure you havent blown the map sensor off the intake, its only held in by the little grommet so thats a possibility