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lq4 trouble codes

Old 07-30-2012, 05:59 PM
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Default lq4 trouble codes

I'm a noob to this ls swap thing....scanning codes in my 6.0/4l80 '86 c10....heres what I found...
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Old 08-04-2012, 10:09 PM
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Has your truck been fine or is this a recent swap and you are tring to work out the bugs.
Is the PCM stock.?
What are you running for a fuel pump?? Just curious
Old 08-05-2012, 06:26 AM
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Looks to me as tho unused sensors haven't been turned off...
Old 08-05-2012, 09:47 AM
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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.
Old 08-05-2012, 03:39 PM
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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....
Old 08-06-2012, 06:53 AM
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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
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Old 08-06-2012, 07:00 AM
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po 650 is probably because you dont have a check engine light wired in.
Old 08-08-2012, 08:29 PM
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Originally Posted by psiconversion
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
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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.....
Old 08-23-2012, 08:06 PM
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so just for fun I unhooked the purple brake switch wire, and that got rid of the hard shifts and the trouble code?
Old 07-06-2013, 05:11 PM
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