I've seen several pop on a car with a stock tune. Something in the no-lift shift process was causing it.

 

Man, they should've Lemon'd that thing by now. It would've been in the best interest of both him and GM it sounds like.

Several people, including me, have witnessed what is best described as an "NLS Spike". In my case, for instance I can go from 22 to 25.5 or something and back again during an NLS. Something the engine/ECU is doing is causing some sort of artificial load somehow or perhaps letting up on the wastegate a bit during the shift to keep everything prime for after the shift.

This sudden high spike may be at least part of what's taking out these MAP sensors.

 

I'm on my third one as well. Hopefully the rumor is true, that its just a bad run of them...

 

will the dejon MAP-Regulator help with this problem??????

 

No.

There was a defective run of MAP sensors that got installed on apparently only Cobalts. People running stock boost levels have this problem, too.

You must get the sensor replaced under warranty.

 

Well I got mine back from the dealer after they put a new computer and map in it. I haven't had a chance to get your tune put back on the new computer.

Chad

 

Weird they replaced the computer, too - that's the first time I've heard of that.

In all the cases I've seen of this problem - and one customer did manage to catch the actual failure it in a datalog - the MAP sensor is just going along reporting its pressure and all, and then all of the sudden it just goes to 0 kPa.

 

Ive been running 28-30psi over 10K miles now, same OEM sensors, its not the boost level. 2 people I know have constant MAP sensor issues, different tunes/psi levels etc..

 

I believe that was me.

 

Anyone had problems with the upgraded sensors with GMS1?

 

mabey we have to get the stage 1 sensor???

 

The stage 1 sensor just shows extended range...

 

Just popped another, this makes 3 in 6k miles...piece of ****,!!! however I do suspect NLS is involved in some fashion with a flawed MAP.

 

Last time I was tuned for about a month and right before I got the code P0107. I WOT on a steep hill, I wanted to fly by and slow slow driver, when I got home I turned off the car, waited a couple of hours and turn the car back on and bump the code popped on.

 

that's cause the repair printout the dealers have says to replace the computer if the map sensor voltage readings read anything or nothing lol it's a typo on GM's part and your dealer couldn't put 2 and 2 together to call them up and ask what was up. all they needed to do was replace the map sensor.

 

I told them there was nothing wrong with the computer and to replace the map and they just blew it off like I didn't know what I was talking about.

 

So if the map sensor goes out it'll throw a code p0107? Or are there other symptoms of it going out?

 

The repair states it and its more money for the dealership and techs

 

Yep. That's the only symptom. The car otherwise seems to run fine (from what I've been told - I've never run into it on my car)

 

Normally the car will run really rich once it goes out. It no longer has the ability to properly calculate cylinder airmass and thus the amount of gasoline to be injected. The car will normally smoke and will feel "lazy".

 

is it worth it to get the 3bar MAP?

 

Well knock on wood mine hasn't gone out in awhile, this on has lasted 5000 miles, would definately consider the 3 bar if you are tired of the CELs and rough starts. I still think that NLS has something to do with wrecking the corrupt MAPs

 

Found this thread and it answers a lot of my questions.

THE SEARCH BUTTON DOES WORK! OMGGTFOTMITGFT!!!!!

I threw this code yesterday. All was fine until I NLS making a video. Code came on after I shut the car off and went back out later.

 

Hate to revive an old thread, But I'm about to diagnose a map sensor for a friend tomorrow.

Anyways on to my point, has anyone found the cause for this? other then just blaming a humongously bad batch. IE boost spike, or spike in combination with engine bay heat wearing down on the sensor till it calls it quits.

 

So I'm having the Po107 and misfires on all cylinders and I was just wondering, when you guys are talking about replacing map sensors, are you talking about the upper one or the lower one?