Car shakes and goes crazy when hitting boost?
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Car shakes and goes crazy when hitting boost?
I was driving around a few days ago and went WOT, as I hit peak boost the car began to shake and go crazy. I pulled off to the side of the road and I saw that there was a vacuum line that came off of the intake manifold. I hooked it back up and everything seemed fine again.
Now last night when I was driving again it did the same thing, but when I checked the same vac line it was still on. I've looked everywhere for another vacuum line to be off and I can't find anything.
I checked to see if my car threw any codes and it didn't, the feeling is very hard to describe. The revs keep going up but power is gone and the car is stuttering like crazy untill I lift off the gas. The strangest part though is sometimes the car runs perfectly and then other times it does this.
Could I maybe have a bad tank of methanol? Boost leak? Fuel cut? I honestly have no idea. Any help would be greatly appreciated.
Now last night when I was driving again it did the same thing, but when I checked the same vac line it was still on. I've looked everywhere for another vacuum line to be off and I can't find anything.
I checked to see if my car threw any codes and it didn't, the feeling is very hard to describe. The revs keep going up but power is gone and the car is stuttering like crazy untill I lift off the gas. The strangest part though is sometimes the car runs perfectly and then other times it does this.
Could I maybe have a bad tank of methanol? Boost leak? Fuel cut? I honestly have no idea. Any help would be greatly appreciated.
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I've checked all the piping and I see none of them disconnected or moved even the slightest bit.
I'm going to remove the intake and look at the turbo in a few mins.
Edit: Removed the intake pipe and checked the turbo, everything looked fine.
Last edited by sleet; Dec 20, 2007 at 08:54 AM.
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http://vfaq.com/mods/ICtester.html
But what doesn't make sense is that sometimes the car will run strong the entire way to red line and then I make a u-turn and do the same thing and it goes crazy.
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could be the maf sensor or the map sensor. but that would surely throw a code on the check engine light.
have you readjusted your boost for the colder weather??? maybe your boosting higher since it's colder and hitting fuel cut
have you readjusted your boost for the colder weather??? maybe your boosting higher since it's colder and hitting fuel cut
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miles? check your plugs if your sayin its hesistating in boost... if not go back to jestr and tell them what your goin through and see if they can help you (i only say go there because thats where the car was tuned)