The 1947 - Present Chevrolet & GMC Truck Message Board Network

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)
-   LSx Swaps (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=206)
-   -   crank variation relearn (https://67-72chevytrucks.com/vboard/showthread.php?t=664311)

LeesTruk 03-21-2015 05:32 PM

crank variation relearn
 
After the LS engine is installed, harness reworked and PCM reflashed by whatever vendor is chosen, is it necessary to perform a crankshaft variation relearn, and if so, does a Tech2 need to be used, or is there another way to do it? Thanks

Lee

BR3W CITY 03-21-2015 06:42 PM

Re: crank variation relearn
 
Depends how far out of sync the cam and crank sensors end up, which will depend on the cam. Most of the time its not "needed". Forcing a crank relearn is something to consider if it wont't fire, or throws repeated crank and misfire MIL's, without ever running. Sometimes people who have tripped VATS reported having to do it after, but thats only speculation.


All times are GMT -4. The time now is 05:38 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright 1997-2025 67-72chevytrucks.com