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check engine light on after motor/trans mods

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Old 11-02-2010, 12:18 PM
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Default check engine light on after motor/trans mods

I have these codes on after dropping a 5.3L in my truck with a 224/224 cam, 3600 stall, longtubes, transgo hd-2, and vette servo

P0740-TCC circuit malfunction
P1810-TFP valve switch malfunction
P2761-TCC controler 1 circuit open.


Before I tow it to Don@slowhawkperformance to tune it, i would like to resolve these issues so i dont waste his time, nor my money.

Did anyone else run into these? solutions? right now my truck stalls out. the video of that is here:

http://www.youtube.com/watch?v=pHOrjo4j5II


oh and it should also be known that the wiring harness for the truck is from a 4wd, not 2wd. everything is unplugged and no "service 4wd" is on

Last edited by Cook; 11-04-2010 at 08:50 AM.
Old 11-04-2010, 08:55 AM
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bump

still have these codes, I checked to make sure I have voltage at the transmission plug and verified the 250K impedance through the wiring.

next step is dropping the pan to check out the wiring inside, unless Im suppose to just tune this out
Old 11-04-2010, 09:44 AM
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I don't think your tranny codes are tune related.
Old 11-04-2010, 10:24 AM
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any suggestions on where to start? im thinking about dropping the pan and checking the connections on the valve body. Its the only thing i touched. the trans has 55k miles on it and was 100% fine before i put the converter/servo/hd-2 kit in
Old 11-05-2010, 09:09 PM
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First post here, but i thought i would chime in. According to my chiltons your codes are....

P0740 - Torque converter clutch enable solenoid circuit

P1810 - Trans pressure switch assembly malfunction

P2761 - (was not listed)

Im not sure if that really helps or not you listed pretty similar causes. good luck.
Old 11-06-2010, 09:23 AM
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while i was at my other job thursday night i printed out a novel worth of information from alldata. today im going to wire up the efans and a few other odds and ends. when the truck is back up on the lift during the week i'll have to drop the pan and check out the connections

thanks for the help guys
Old 11-06-2010, 03:08 PM
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ur truck sounds sweet even though i dies. lol
Old 11-06-2010, 03:26 PM
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Curious. Why did you change the harness?
Old 11-06-2010, 03:42 PM
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Originally Posted by viciousknid
Curious. Why did you change the harness?
Originally a V6 truck I believe.
Old 11-07-2010, 07:36 AM
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yeap. my truck was a bottom of the line V6 with crank windows. now its got a v8 with power everything. every harness was changed. even the chassis harness because the fuel pump was different (returnless now)

for an update, i went out to the garage yesterday in preperation of removing the pan, i checked the codes and none of the transcodes were there. i drove it around the block, everything is fine. i just need to figure out the fan harness and have the other codes shut off. the only problem it has is when the torque converter locks up the truck shakes. not sure if this is because its a 3600 stall with 3.42s or if the line pressure is wrong. i checked the codes after it happened and nothing popped up. its also a brand new converter so i cant see it being that

heres a vid for you guys of some of the progress

http://www.youtube.com/watch?v=gdDP8MTtew4


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