gambler87 Posted April 13, 2014 Report Share Posted April 13, 2014 (edited) I just did a 97 wiring harness swap into my 96 Gtp. And now I'm getting a slight backfiring through the intake at anything over half throttle, it won't shift into 3rd or 4th. And won't go any higher then 65mph. And I also can't move my electric seat anymore and have no blower motor for heat. I have all my gauges and my radio work still. It also doesn't rev over 4500rpm Sent from my XT1080 using Tapatalk Edited April 14, 2014 by gambler87 Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 13, 2014 Author Report Share Posted April 13, 2014 Does anyone have any clue at what would be causing this? Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 13, 2014 Report Share Posted April 13, 2014 Check ur coils and icm, my l67 did the same thing and it ended up being a dead coil Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 14, 2014 Author Report Share Posted April 14, 2014 Do u know what they are supposed to ohm out at. I'm getting no misfire codes and my data logger is showing no misfires either Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 14, 2014 Author Report Share Posted April 14, 2014 If u want a datalog I can post one up tomorrow. What would u like to see if u want one? Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 14, 2014 Report Share Posted April 14, 2014 I dont kno the ohmage, i just pull one wire at a time and start it to check spark. Im old skool so i wouldnt kno what to do with a datalogue lol. Post it tho, mebbe one of the code junkies can help Do u know what they are supposed to ohm out at. I'm getting no misfire codes and my data logger is showing no misfires either Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 14, 2014 Author Report Share Posted April 14, 2014 Could a tps sensor do all this? Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 14, 2014 Report Share Posted April 14, 2014 That is a good possibility Could a tps sensor do all this? Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 14, 2014 Author Report Share Posted April 14, 2014 Well I had a tps sensor code pop up the other day when I did my first start up. It was plugged in at the time. But I've been having issues reading my DTCs now so I can't tell if it happened again. But the check engine light is on Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 14, 2014 Report Share Posted April 14, 2014 Id double check the c100 pinouts too Well I had a tps sensor code pop up the other day when I did my first start up. It was plugged in at the time. But I've been having issues reading my DTCs now so I can't tell if it happened again. But the check engine light is on Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 14, 2014 Author Report Share Posted April 14, 2014 I did most of the wiring I was told to do. But I can't find out where the neutral/park wire from the car is supposed to go. And no one has told me if I can run it into a wire on the ecu or if it has to go all the way to the connector on the trans. Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 14, 2014 Report Share Posted April 14, 2014 Wait...is ur car pegged out at 4000 rpms? I did most of the wiring I was told to do. But I can't find out where the neutral/park wire from the car is supposed to go. And no one has told me if I can run it into a wire on the ecu or if it has to go all the way to the connector on the trans. Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 14, 2014 Author Report Share Posted April 14, 2014 If I floor it and hold it. It will not rev over 4500rpm holding it at wide open throttle and it will not auto shift into anything gear but first and second Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 14, 2014 Report Share Posted April 14, 2014 Ok we just found ur issue run the park/neutral wire to pcm. Par If I floor it and hold it. It will not rev over 4500rpm holding it at wide open throttle and it will not auto shift into anything gear but first and second Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 14, 2014 Author Report Share Posted April 14, 2014 Which wire in the PCM? Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 14, 2014 Report Share Posted April 14, 2014 That im unsure of Which wire in the PCM? Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 14, 2014 Author Report Share Posted April 14, 2014 OK. I should be able to look at the pinouts and figure that out. Would a back probe the wire going into the PCM then? Then I would be getting feed from the trans to go to the car Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
l67ss Posted April 14, 2014 Report Share Posted April 14, 2014 Yeah pcm just needs to need to kno its outta park OK. I should be able to look at the pinouts and figure that out. Would a back probe the wire going into the PCM then? Then I would be getting feed from the trans to go to the car Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 15, 2014 Author Report Share Posted April 15, 2014 Alright I think I have a handle on this wiring issue. Can anyone tell me where the stoplamp/torque converter clutch switch is. And also I need to know what plug in on the trans, the park/neutral switch signal wire goes to. Thanks Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Imp558 Posted April 15, 2014 Report Share Posted April 15, 2014 This what you're looking for is the one that the brake pedal depresses. And the neutral safety switch is mounted to the transmission Where the cable goes to the arm. Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 15, 2014 Author Report Share Posted April 15, 2014 I need connector pinouts for the c111 and c113 (they are the connectors on the neutral safety switch) for a 96-98 wbody of any kind. They all have this same orange/black wire and that is the one causing the PCM to not see what gear the trans is in Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 15, 2014 Author Report Share Posted April 15, 2014 So I can't find a orange/black wire on the two trans connectors of the neutral/park safety switch. Does anyone know if 97+ cars figure out neutral/ park differently than pre 97s Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Imp558 Posted April 16, 2014 Report Share Posted April 16, 2014 Nope, should be the same IIRC, and it should be on the gray, 7 pin plug on the P/N switch. According to that print, the first cavity, "A" Quote Link to comment Share on other sites More sharing options...
gambler87 Posted April 16, 2014 Author Report Share Posted April 16, 2014 The first cavity on that plug in has no ire to it at all. There is a plug in the pin where the wire should go. Does that mean I can still put it there. I wouldn't think so because obviously it is getting it from another source thought the wiring harness Sent from my XT1080 using Tapatalk Quote Link to comment Share on other sites More sharing options...
Imp558 Posted April 16, 2014 Report Share Posted April 16, 2014 You can check between A and D with a meter and see if the circuit is closed in park and neutral, then put a pin in A. I can't remember for certain but I feel like the 7797 PCM may not have a park/neutral signal. I'd be far more concerned with the wires on the little white plug on the neutral switch as I'm certain those reference the PCM. You can test the theory of it being the Orange/Black wire by manually grounding it and ungrounding it when you move the shifter but Fuel Pressure, and condition of ignition system components aould be wise things to look closely at. I had rev troubles from bad plugs. Quote Link to comment Share on other sites More sharing options...
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