Thread: bad map sensor?

yea that seems like the ones i found,im lost as to what can cause my light to not work.Im getting boost and as i said before it lights all the way up on a start up.Ive had sevral problems in the past few months as you have seen in my threads.Im starting to think its my PCM causing all of this.I havent been able to find a stock one locally.I want to go to GA and get a custom tune from TDC but not sure if it would be worth the drive if these problems arent PCM related.I sent him a PM with my symptoms for his input.Ill go ahead and post them up here to get feedback from you and other members

The past month my GTP has started acting really funny.It has thrown numerous throttle pos. sensor codes.After replacing the sensor twice it still keeps popping codes,one day i had the idea to reset PCM and see what happens.It obviously cleared the code but it killed all the other symptoms of a bad TPS also for example transmission slippage,rough idle etc etc.At speeds from around 30 mph to 60 mph the trans has some intermittent off the wall shift points.For instance it feels like it upshifts wayyyy too early.Seems like it is in 4th gear from the speeds of 30mph and up and erratically downshifts and upshifts until i get over 60 mph.Sometimes when i go WOT to pass someone it will stumble hard for a few seconds then downshift to proper gear.My boost indicator light on DIC has stopped working since all these other problems have come to light.Boost light will come on at a start,but fails to work any other time.I know everything on these cars is all pretty much electronic and a minor problem in one area can cause other problems in other areas such as TPS causing trans problems ETC.Doubt its of any significance but i got the ABS light on and trac light off also.My question is can a bad PCM cause these problems?Im not getting any SES lights except when TPS starts acting screwy.I also had EPC solenoid in trans replaced a few months ago.

Originally Posted by gtpinsc

yea that seems like the ones i found, im lost as to what can cause my light to not work. Im getting boost and as i said before it lights all the way up on a start up.
Boost light will come on at a start,but fails to work any other time.

Hello, I'm having a similar boost meter problem and can't seem to find any info. It worka fine for awhile, but if I cruise on the highway or sit too long, the meter starts to jump all over, full boost to none, like a little lightning storm on my dash. The idle usually gets rough about the same time, and if I'm on the highway it starts lurching and has died on me a half-dozen times. I recently bought and installed a Racetronix fuel pump, since everyone I asked seemed to think mine was going bad. It ran fine a couple days, but as soon as I sat at the taco bell drive-thru on a hot Saturday, it acted out again like before. I've recently replaced the fuel filter, so I'd like to rule that out. I've been advised to change to MAP next, but no one seems to know why my boost meter is acting up. Did you ever find a solution for yours?