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Jan 26, 2012 | 08:26 PM

LaredoZ28

Thread Starter

Instructor

Joined: Nov 2007

Posts: 202

Likes: 0

From: San Antonio Texas

Help needed

I'm having problems with my C5 LS3 Swap. I got everything together and the car started up and ran fine last saturday. Sunday morining I go to start the car so I can add Trans fluid and she wouldn't stay running. Everything was fine from one minuet to the next.

I just checked the codes and I'm only gettin P0336 which is Crankshaft Position Performance. I've got the Lingenfelter box and its powering up like its supposed to. I've also noticed the fuel pressure drops off then comes back up and repeats.

Any help is appreciated. I'll be tuning the car Febuary 3rd so I need it running before then.

Thanks
Steven

Last edited by LaredoZ28; Jan 26, 2012 at 08:47 PM.

Jan 26, 2012 | 10:43 PM

Jewjenk

Pro

Joined: Dec 2009

Posts: 719

Likes: 2

From: Columbia South Carolina

Re check the connector to the sensor, check grounds make sure they are tight. If the sensor is not new, may need to replace...............

Jan 27, 2012 | 08:15 PM

corvette77

Pro

Joined: Sep 2008

Posts: 537

Likes: 2

From: Whitesboro Texas

A guy I work with has an LS3 in his C5. I saw your post and asked him about it today. He said it sounds like it is most likely your tune. It needs to be set to LS3 parameters instead of the LS1.

Jan 27, 2012 | 08:40 PM

LaredoZ28

Thread Starter

Instructor

Joined: Nov 2007

Posts: 202

Likes: 0

From: San Antonio Texas

Quote:

Originally Posted by Jewjenk

Re check the connector to the sensor, check grounds make sure they are tight. If the sensor is not new, may need to replace...............

I will be checking grounds again tomorrow and i'm going to buy a new sensor just to be safe.

Quote:

Originally Posted by corvette77

A guy I work with has an LS3 in his C5. I saw your post and asked him about it today. He said it sounds like it is most likely your tune. It needs to be set to LS3 parameters instead of the LS1.

I'll be getting the LS3 parameters flashed to my pcm tomorrow to see if that fixes it.

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