Vibration after Pre cat delete install
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Burning Brakes
Joined: Sep 2006
Posts: 846
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Vibration after Pre cat delete install
Just had the precats installed on friday(4+ hours
).. i did notice a power gain.. I also get that rattle on cols starts. So I'm driving on the freeway at about 65mph when I feel a strong vibration, then loud rasp like I have a subwoofer in my trunk.. The car sputters slightly when i slow down to the shoulder.. I pop my hood and don't notice anything strange. So I pull back on the freeway when it feels restrained. I'm gonna take the next exit but the problem goes away( I actually drove 100+ miles and no problem).. So has anyone with pre cats had this problem? What could it be? Could my ecu be learning this new mod? Could my stock exhaust set up be creating some sort of bottle necking(precats-j pipe-race pipe-stock exhaust & mufflers)?
).. i did notice a power gain.. I also get that rattle on cols starts. So I'm driving on the freeway at about 65mph when I feel a strong vibration, then loud rasp like I have a subwoofer in my trunk.. The car sputters slightly when i slow down to the shoulder.. I pop my hood and don't notice anything strange. So I pull back on the freeway when it feels restrained. I'm gonna take the next exit but the problem goes away( I actually drove 100+ miles and no problem).. So has anyone with pre cats had this problem? What could it be? Could my ecu be learning this new mod? Could my stock exhaust set up be creating some sort of bottle necking(precats-j pipe-race pipe-stock exhaust & mufflers)?
Former Sponsor
Joined: Nov 2005
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From: Chicagoland
For the rattle check the heat shield over the immediate shaft. Sometimes it rubs a few people reported odd noises at first but they all went away I think it has something to do with the flex section breaking in. As for the sputtering did you reset the ECU after the install?
Thread Starter
Burning Brakes
Joined: Sep 2006
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No I didn't.... I guess I won't worry about it unless it happens again. Should I reset the ecu? I've driven it for 200 miles. I'll have my installer check the heat shield but I don't think it would cause sputtering..
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Burning Brakes
Joined: Sep 2006
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94 DC4 RS LSV/Turbo
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From: New York City | Stuck in Traffic
any time you work under the hood and remove a sensor even the smallest sensor like an intake air temperature sensor you should reset the ecu
I did precat install on sunny201's car, I unplugged the battery, or so I thought, turned out he had 2 batteries, 1 for the car, 1 for music, the car ended up having power to it...
when I completed the install everything was great
few miles later he got a check engine light
he unplugged both batteries and he's been problem/trouble free for 5k+ miles
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