Zl1 won't accelerate on freeway

[ZMEnow]

Originally Posted by Mrgwrnch

The tires are stock size. I have HP tuner software that I can datalog with but I'm a beginner at best.

Data log PIDS accel pedal position 1 sensor, ect, engine rpm, fuel pressure, ignition timing cylinder #1,Knock retard, maf frequency,long term fuel trim bank 1 and #2, and engine speed. That should show how much timing is being pulled and what else is happening when it gets pulled for starters..

[HDRDTD]

Originally Posted by ZMEnow

Data log PIDS accel pedal position 1 sensor, ect, engine rpm, fuel pressure, ignition timing cylinder #1,Knock retard, maf frequency,long term fuel trim bank 1 and #2, and engine speed. That should show how much timing is being pulled and what else is happening when it gets pulled for starters..

you're assuming the OP HAS a datalogger capability.

[Sven59]

Originally Posted by HDRDTD

you're assuming the OP HAS a datalogger capability.

See post 14

Sent from my SM-G955U using Tapatalk

[HDRDTD]

Originally Posted by Sven59

See post 14

Sent from my SM-G955U using Tapatalk

Oooops, missed that one. I stand corrected. Thanks.

[Mrgwrnch]

I'll make a custom list and see what I can see. Thanks again.

[Mrgwrnch]

Well I've finally had time to check back on my acceleration issue. I hooked up HP Tuners and started logging data. I got on the freeway and went full throttle. What I noticed this time (for some reason) the traction control system light comes on. I didn't see it at first because my steering wheel hides it. Post #12 was on to it. I did change to BFG's in the stock sizes. It may have been around the time I switched. The funny thing is, it doesn't fall on its face at lower speeds when you need traction control the most. Do I need a GM scanner to check a traction control module to see what is causing this?

[Mrgwrnch]

Oh and when I turn the traction off, it pulls hard without tire spin.

[STUNNAH]

I would not think the tires are the issue since you said it has been doing this all the while... Sounds more like a fuel issue...As others have suggested clean up the MAF sensor and let's hope that does the trick.

[Mrgwrnch]

The fuel pressure was steady at approximately 60 psi. Cleaning the MAF is something I plan on looking at because of the cold air induction. It seems to be traction control issue to me since when turned off it runs well.

[Aliveguy5]

My CAI dirtied up my MAF even though it looked spotless on removal. I sprayed some CRC maf cleaner on it, installed it and my car went right back to normal. Seriously go buy some MAF spray cleaner and do it. It will take 5 minutes and your problems will likely be gone.

[Mrgwrnch]

I have some cleaner, I'll do it.

[STUNNAH]

Does the car have a low and high pressure fuel lines??? My daughter has a Hyundai sonata that was doing the same as your car... When I drove it accelerator to the floor it took 3 miles to get to 80mph, the high pressure line was bad not supplying enough fuel...Had it replaced and has not had an acceleration problem since...

[fluxzl1]

check your grounds (under hood) a bad ground can cause all kinds or crap...

[Mrgwrnch]

Thanks for the replies. I'll look into this.