Transmission issue?

[Corey Sig]

Under heavy acceleration around 5-6 rpms for a spilt second doesn't go. I believe it's from 2 to 3rd. I want to say it's a transmission problem because it only does it from 2 to 3rd. And only every now and then and like I said a spilt second Its like it just doesn't want to go. Anyone else have this problem? 2011 Pp. 93 octane tune 3 bar map 170 stat. Cai. Corsa exhaust. VTA.

 

[SHOdded]

Are you logging by any chance? Any idea what boost level/load/fuel pressure at the rail etc at those rpms? Possible PCM is pulling timing to save itself.

 

[Corey Sig]

No. I haven't tried that. I checked for possible boost leaks and nothin. But I will try that and see what I come up with. My usual boost levels average are 16-18 under heavy acceleration. Why would it be saving it's selfrom though?

 

[SHOdded]

Usually it's torque management or reaction to knock sensor readings that makes the PCM pull power. If it sees an overboost condition (possibly set a code), it can do the same. The boost levels you quoted should be no problem for the stock turbos, sustained 20+ might be. Do you use Torque Pro or SCT to monitor your SHO?

 

[Corey Sig]

SCT. Sometimes I do hit the 20s+ so maybe that is happening. I'll have to run some tests on it and keep my eye open. Thanks SHOdded. Your number one!

 

[SHOdded]

If you do datalog, be sure to send them to Torrie for a onceover. He can spot anomalies pretty quickly.

 

[StealBlueSho]

When looking at the logs check the throttle position to see if PCM is closing it up... Mine used to do that because I was leaning out.

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