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Tech & Fab
5.3 No throttle
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<blockquote data-quote="Beerj" data-source="post: 748567" data-attributes="member: 10035"><p>Just finished my gen 3 5.3 swap in my yj using a PSI conversions harness. This engine is dbw. Starts and runs fine but after a couple of blips of the throttle, I lose all throttle response and the pedal is essentially dead. Throws a U0107 code which from my research is indicating a possible grounding issue with the TAC module. As far as I can tell, there isn't a dedicated grounding wire for the tac module so I'm guessing it's grounded through the ecu and uses the same ground that is located where the harness splits to either side of the engine. Am I missing something obvious here? Of course, I could just buy a new tac module but I'd rather not just throw money at it until something sticks. I should also mention, I can apply light throttle to hold rpm but as soon as I give it any remotely quick input, it quits working. Also, I've also seen that this can sometimes be an issue if the ECU, TAC and pedal aren't all from the same vehicle. In my case, the ECU came from PSI but the pedal, tac and engine are a matched set. If this is the case, how would I go about fixing that since I don't have the original ecu? Thanks in advance.</p></blockquote><p></p>
[QUOTE="Beerj, post: 748567, member: 10035"] Just finished my gen 3 5.3 swap in my yj using a PSI conversions harness. This engine is dbw. Starts and runs fine but after a couple of blips of the throttle, I lose all throttle response and the pedal is essentially dead. Throws a U0107 code which from my research is indicating a possible grounding issue with the TAC module. As far as I can tell, there isn't a dedicated grounding wire for the tac module so I'm guessing it's grounded through the ecu and uses the same ground that is located where the harness splits to either side of the engine. Am I missing something obvious here? Of course, I could just buy a new tac module but I'd rather not just throw money at it until something sticks. I should also mention, I can apply light throttle to hold rpm but as soon as I give it any remotely quick input, it quits working. Also, I've also seen that this can sometimes be an issue if the ECU, TAC and pedal aren't all from the same vehicle. In my case, the ECU came from PSI but the pedal, tac and engine are a matched set. If this is the case, how would I go about fixing that since I don't have the original ecu? Thanks in advance. [/QUOTE]
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