lq4 trouble codes
Teching In
Joined: Jul 2012
Posts: 18
Likes: 0
you need a good tune. from a tuner shop. that should take care of about all of those. dont clear the codes before you go. having those codes in there will help him keep them off. the MAF that you are running, did it come with the computer off of the same vehicle? cause the rich codes and missfire codes are usually set together even without a MAF code when the numbers of the MAF is not the one programmed into the ecm. there are a host of other things that can set those codes though. im not speaking from swap experience, but from diagnosing this stuff at work.
Thread Starter
Staging Lane
Joined: May 2010
Posts: 52
Likes: 0
I think the rich codes were caused by the COT, turned them off in the Diablo tune, codes never came back up....still having trouble with the tranny codes tho...engine is 04 gmc savana van 6.0l/4l80e..with TCI shift kit.....pcm is red/blue connector, with 02 silverado tune from PSI...running a whalbro 255 inline pump....
Moose, did you ever get the items hooked up that we discussed? Can you give me a call when you get a chance and we can go through some troubleshooting. Thanks.
Jon
PSI
Jon
PSI
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Thread Starter
Staging Lane
Joined: May 2010
Posts: 52
Likes: 0
I hooked up a mil light, not sure if its working, still getting the (po650), checked brake switch wiring (po719), checked tranny connections all solid, still need to check for voltage, and continuity (po717).....and the (po638)?...canlink ecm/instm circuit/network?....wtf is that?...it runs 100x better with the Diablo tune, but still throwing the codes.....
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