What could cause this?

[Dan97gst]

What could cause the car to cut out while driving, it is not that car dies just while you are driving the car seems to cut out for no reason then the power will jump back all of a sudden. Alot of the time it will cut out while accelerating and shifting gears if the rpms get higher than 2k. I have replaced the ISC, TPS, and MAFS. What else could cause this. Thanks

 

[stomp]

did you check for any boost leaks,how old are your plugs and wires and is your car grounded good

 

[stomp]

Is it a mild sputtering kind of cut out or a heavy cut out like you hit a brick wall, if its a hard one you might have a boost leak and your hitting fuel cut

 

[Dan97gst]

It is like hitting fuel cut or hitting a brick wall, so a boost leak leak could cause the engine to fuel cut even while not under boost at cruising speed.

 

[GarbageMcGee]

I'm not the most savvy guy out there but I would guess it could be something as simple as a loose negative connection or bad ground like the what was said above. It happened to me in the past. If you have a loose connection, it could be getting worse from normal engine vibrations. Hopefully it is something this simple...

 

[DJYoshaBYD]

http://vfaq.com/mods/ICtester.html

boost leak test.... as soon as you are hitting boost, its doing this... just try it... this is, in my opinion, one of the most common mishaps that screw up drivability... after that, start checking spark...

 

[stomp]

Have you washed under your hood lately or cleaned your maf sensor? Something could still be wet also.Might want to check if your maf is fully plugged in also?

 

[DJYoshaBYD]

yup.. these things are very sensitive to water.. check that as well.. check the MAF and CAS

 

[Dan97gst]

What is a CAS? No I have not washed under my hood. If there was to be a bad grounding where would be the first place to check for this problem? I have already changed the MAFS, TPS, and ISC Valve if that helps. I also did a boost leak test and I found a couple of leaks but I fixed them and I still have this problem.

 

[stomp]

Cam angle sensor (CAS),I would start at the neg battery cable how does it look,is it loose?

 

[khartley]

Completely different car, but...my supercharged Cobalt did the same thing. It would kind of 'hiccup' and 'studder' under acceleration, whether I punched it or just gradually got into it. Turns out my tune was incredibly rich, I was fouling out my plugs after only 3k miles.

 

[Defiant]

Make sure you battery isn't shorting against the hood or a strut bar.

 

[Dan97gst]

ok, I lifted the hood the other night and I reved the motor and I saw a spark jump off of the plug wire, but it only did this one time. I am planing on buying new wires within the week. But as a quick fix for a day or so would wraping the wires in electrical tape be a quick fix or would the spark just go through the tape and not help anything. Thanks