Let me just start off by saying Ive searched and searched through this forum and other but still can't solve my issue. I did a gsr swap about a month ago into my 96 civic coupe, ever since then it's been nothing but problems. First car was in limp mode from the start switched tps and been doing it off and on and dont really know if that has been fixed since car wont start. Well my big issue right now is the car wont start. There is power to the starter when I turn the key but no spark or fuel pump prime. My check engine light goes dim when key is in on position (all other cluster lights normal) and no light on ecu port (hondata s300). I've checked all grounds including on thermostat even switched new main relay. Weird thing when I unplugged my main relay check engine light when bright like normal. I'm completely stumped, would love some help.

 

Id really love to help but im considered a troll here <br /><br />To help others help give more details <br /><br />Engine harness <br />Year of motor (obd1 or 2 ) <br /><br />If you have a schematic or know how to read one <br /><br />Youre missing voltage to the ecu for one <br /><br />That alone wont let the fuel pump prime since the main relay gets its signal from the ecu <br /><br />Same with the icm for no spark <br /><br />Check youre ipg1 and 2 inputs for 12 volts at the ecu and if you dont have 12v trace back from there <br /><br /><br />http://ff-squad.com/technet/wiring.obd2a.htm<br /><br />Pinout

 

Will definitely check that today

 

Verified.

 

Just check I do have 12v to ipg 1 and 2. And motor is a 96 gsr with an obd2 to obd1 harness made by Carlos Zapien.

 

Did your hondata work before? Is it new?

 

Next check your grounds gp1 and 2 <br /><br />From the ecu end of the harness to the thermostat housing ground <br /><br />Or to any where on the chassis<br /><br /><br />To be more specific <br /><br />Check for continuity from gp1 to the thermostat ground or anywhere on the chassis <br />Same for gp2 <br /><br />Also switch your leads around and probe the igp1 with the negative and the positive at gp1 and check for 12v

 

Alright I feel stupid, even though I checked all my grounds in came to be the thermostat ground after all. For some reason the hole on the thermostat wasnt giving a good ground point. I moved it to different spot and car started right up. Smh.

 

Good **** bra <br /><br /><br />So im not a troll after all <br /><br />

 

Don't jump to rash conclusions.

 

lol