Hey guys, I'm not FI but a buddy suggested I should post in here because you guys have some good ideas. Weird thing happened today while driving on the freeway I was in 6th and I was coasting and I went to accelerate and the car studdered for a second before it began to accelerate. When I say studdered, it sounded like how the car sounds when you hit the rev limiter in neutral, except I was at about 3K. So it didnt' do it for about 5 minutes so I just let it go. I get to about 3 stop lights before my place and I come to a stop. I go from first and start to slip the clutch and it reved to about 1500rpm and started studdering for a second, accelerated another couple hundred RPM and did it again until I got around 3-4K and it would drive fine as long as i didn't depress the pedal any more than I had it. It did it at every light I came to without fail, however when I reved it in neutral or tried to hold an RPM with no load it wouldnt do it. No CEL and it's not in limp mode. Any ideas? I'd like to hear some of your ideas before I give you my theories just to get an unbiased opinion. Thanks.

 

Mods(if you can call them that) are, K&N cone filter, Motordyne 5/16 plenum spacer and a flowmaster muffler. All mods have thousands of miles and years on them so I know its not the mods. 67K on the car

 

Sounds Like limp mode try searching that.
Did it through any codes I'm guessing the check engine light is one. If so figure out what codes are being thrown. Then check back with us.



Edit: re read your post,, Try resetting the ECU turn on your headlights and unplug the battery. Let sit for about 30 min. If no codes it's hard to say.

 

Forgot to mention that was the first thing I tried. I reset it both with the Gas pedal sequence and disconnecting the battery. It drove fine for about 15 minutes tonight and right as i pulled into my work parking lot it started doing it again.

 

Check your MAF sensor/coil/plugs. You are from austin, stop by uprev.