Low RPM bucking in a mostly stock CTS-V?
08-11-2008, 06:42 AM
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Low RPM bucking in a mostly stock CTS-V? My friend just bought an '05 CTS-V, and it's bucking at low RPMs. All it has is a K&N CAI, and Borla exhaust, 53k miles.
It's been bucking under load at <2K RPMs. It's fine at high RPMs / WOT.
Any ideas what could cause it? Maybe the K&N is screwing with the MAF readings? CEL also came on last night, will scan today.
Thanks
Matt
It's been bucking under load at <2K RPMs. It's fine at high RPMs / WOT.
Any ideas what could cause it? Maybe the K&N is screwing with the MAF readings? CEL also came on last night, will scan today.
Thanks
Matt
08-11-2008, 07:12 AM
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Most likely the K&N - check for leaks. I had some issues after I installed the K&N and before I got tuned. I never got a CEL, but I do rememeber intermittent bucking issues.
08-11-2008, 07:54 AM
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you pull DTCs via the OBDII port. Autozone will do it for free.
If you suspect the K&N, I'd recommend buying some CRC Mass Airflow Sensor cleaner and clean that dude. Often, people over oil the filter (even seen them new that way). The excess oil blows through under high flow rates and deposits on the MAS wires. This alters the readings the PCM gets. It won't hurt to clean, that's for sure.
If you suspect the K&N, I'd recommend buying some CRC Mass Airflow Sensor cleaner and clean that dude. Often, people over oil the filter (even seen them new that way). The excess oil blows through under high flow rates and deposits on the MAS wires. This alters the readings the PCM gets. It won't hurt to clean, that's for sure.
08-11-2008, 10:56 AM
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Kerryt1 took the words out of my mouth. Also, look for air leaks on the TB side of the MAF. If you're letting in air and the MAF isn't reading it, it can really throw the car off.
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08-12-2008, 11:07 AM
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Try cleaning the filter and not putting any/or very little oil on it and cleaning the MAF again. Or, put the stock filter back on and have the k&n tube run into it.
09-03-2008, 10:46 AM
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Took the car to NC and back and the problem was very intermittent. Resetting the ECU (pulling fuse) made the problem go away sometimes, other times no luck. A WOT blast here and there seemed to help and driving it part throttle for extended periods seemed to make it worse.
Will try the MAF from my Z06 and take it from there.
Will try the MAF from my Z06 and take it from there.
