Ok my boost gauge is reading 20 inches at idle which is normal but my map is only seeing 9 inches and my o2 is seeing Max fuel it couldn't be any richer and my tps every couple of weeks sends a code and then automatically clears itself out in 2 or 3 start. Every time it starts to make boost it kinda falls on its face and only makes about 10 pounds,it used to make 15 at full throttle I'm not for sure what's wrong. Would like to hear some suggestions or ideas.
im lost!
- Thread starter adamLG
- Start date
MoarkatsINmuhtrailer
New member
first of all....inches?
secondly...wat have you done to the car.. your obviously new and we have no idea about your mods...
secondly...wat have you done to the car.. your obviously new and we have no idea about your mods...
Fivefingerdeathpunch
New member
15 lbs of boost is ALOT
even 10 lbs is a pretty good amount and no stock GTP can even make close that.
what are your mods?
even 10 lbs is a pretty good amount and no stock GTP can even make close that.
what are your mods?
MoarkatsINmuhtrailer
New member
and im guessing its a vac/boost gauge. where at idle its seeing 20hgs' of vacuum.
Mods are 1.9 rockers ls1 throttle body and mass 3.2 pulley 75 wet shot headers and three inch exhaust and believe me a stock gtp will hold 20 pounds cause I've done it, it went lean and and twisted rods I'm trying to get my car track ready for Friday hoping to hit mid to high 8s but I can't do it if its pig rich
Lol he's saying 20 Inches of mercury, (inHg). It's in a vacuum,
And OP check your fitting on the vacuum line where it connects to the MAP sensor. that elbow likes to split and for whatever reason won't show up on the gauge but will on a scan. And it sounds like your 02 sensor needs replaced as well. The car will default to being way rich as a life preservation method incase of 02 failure.
And you don't have near the mods for a 3.2 pulley. You're gonna destroy it.
And OP check your fitting on the vacuum line where it connects to the MAP sensor. that elbow likes to split and for whatever reason won't show up on the gauge but will on a scan. And it sounds like your 02 sensor needs replaced as well. The car will default to being way rich as a life preservation method incase of 02 failure.
And you don't have near the mods for a 3.2 pulley. You're gonna destroy it.
All vacuum lines are new the o2 is new like 2 months old it sweeps just fine. if it's 20 on the gauge it should be 20 on the map I was kinda of thinking the map is faulty or i need a guy that can tune the motor will be just fine believe me its been my daily for over a year now.
BillBoost37
New member
You have a TPS issue, you know about it. Fix it.
When you get a code, it's not the pcm tossing the light on to say hi to you. It's telling you there's an issue. What if at 100% throttle your tps is reading 5% and that's killing fuel while you have all that air? There are things going on that can hurt the motor and you should fix them.
When you get a code, it's not the pcm tossing the light on to say hi to you. It's telling you there's an issue. What if at 100% throttle your tps is reading 5% and that's killing fuel while you have all that air? There are things going on that can hurt the motor and you should fix them.