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Old 08-13-2014, 04:07 PM   #3
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Ishmot has a spectacular aura aboutIshmot has a spectacular aura about
Join Date: Jul 2014
Posts: 2
Default Re: Stuttering performance at high speeds

Just an update on what the problem ended up being on this van. Turns out it was the Transmission. I had just had a new transmission put in it 6 months ago and it went bad already. Luckily it was still under warranty.

It took quite a while to eventually figure it out but it got so bad that it became obvious that it was the transmission.

My mechanic suspected the cat at one point and then the fuel pump. Luckily none of that got replaced before the transmission got so bad that it was obviously the problem.

Also, The catalytic converter has an O2 sensor above and below it, so if it was bad, the engine light would probably have come on.
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