Kreamer67 Posted August 23, 2010 Share Posted August 23, 2010 just finished building this motor, car wont start, it sputters like it wants to start while cranking but doesnt come alive, also theres an occasional backfire when i let off the key. another thing it does is the coolant temp gauge reads hot and the fans stay running high, the coolant temp sensor is plugged in. but there is no coolant in the system yet. the accessport reads a temperature of 248F which indicates no coolant temp sensor. there is one last thing. a connector underneath the main engine connector. it has 2 prongs but i couldnt find anything that hooks up to it. any ideas? Link to comment Share on other sites More sharing options...
Kreamer67 Posted August 23, 2010 Author Share Posted August 23, 2010 update : car starts. the passenger side coil feed wires were switched. still reading as over heating though Link to comment Share on other sites More sharing options...
Boostin1657615274 Posted August 23, 2010 Share Posted August 23, 2010 it almost sounds like it's in diagnostic mode (the reflash connectors) On the search for a new DD... Link to comment Share on other sites More sharing options...
Sarg Posted August 23, 2010 Share Posted August 23, 2010 That was my first thought. Link to comment Share on other sites More sharing options...
John M Posted August 24, 2010 Share Posted August 24, 2010 The connector you're referring to sounds like the EGT probe from the stock up pipe. It's fine to have nothing plugged in there - just disable the codes in the ECU. I also think it sounds like someone saw the green connectors in the passenger footwell and said "Hmm, these should be connected", leaving you where you are now. Disconnect them! Link to comment Share on other sites More sharing options...
Kreamer67 Posted August 24, 2010 Author Share Posted August 24, 2010 no unfortunately its not the test mode connectors, i had them connected when i was flashing the ecu with my custom map. problem is when their connected the dash reads ERR HC. normal yes, but when i disconnect them, turn the key off and reset the ecu it still reads hot , accessport measures coolant temp at 248* all the time. so far ive tessted the sensor and continuity between the connector and the giant plug for it on the harness. im not sure if this is a common problem or something on my ecu is fried Link to comment Share on other sites More sharing options...
integroid Posted August 24, 2010 Share Posted August 24, 2010 Could be the custom map. Link to comment Share on other sites More sharing options...
John M Posted August 25, 2010 Share Posted August 25, 2010 Disconnect the coolant temp sensor and see what reading you get then. Link to comment Share on other sites More sharing options...
Kreamer67 Posted August 25, 2010 Author Share Posted August 25, 2010 ive tried it with the accessport un installed it still does it and i tried it with the sensor unplugged it still reads a constant 248 degrees, on, off , hot cold you name it. im going to hunt down the ecu tomorow and do a voltage drop Link to comment Share on other sites More sharing options...
0203 Posted September 5, 2010 Share Posted September 5, 2010 I just put an 02 Legacy LEFT (Driver) Cam on an 03 Impreza block with Right Cam. Engine turns but will not start. Checked for spark and no spark. Checked for voltage to primary coil an no voltage. Searched forever for any disconnected wiring harnesses and found none. Checked all fuses and all good. Heard strange noise coming from top of intake manifold. Please help me! I'm out of ideas and running out of time! Link to comment Share on other sites More sharing options...
Kreamer67 Posted September 5, 2010 Author Share Posted September 5, 2010 if you put the wrong cam into the wrong side of the engine of course it will not start the cam position sensor CMP doesnt have anything to read off of. Link to comment Share on other sites More sharing options...
paulpolar600 Posted March 7, 2011 Share Posted March 7, 2011 Wondering what solution if any you found for this. I've got the same problem . . . . . New engine, P0117 engine coolant temp voltage low, replaced the sensor still reading 248 degrees. Fans come on high car will not start. Any help would be greatly appreciated. Link to comment Share on other sites More sharing options...
Kreamer67 Posted March 11, 2011 Author Share Posted March 11, 2011 check your wiring, mine turned out to be some kind of prolblem with the two wires going to the CTS, i ended up jumping the circuit and running fresh wires from the harness to the sensor. problem solved. Link to comment Share on other sites More sharing options...
VaR Posted November 19, 2015 Share Posted November 19, 2015 same issue i have on my 5eat after my re-rebuild, Questions i have is does the cts wire just run directly to the main harness near the turbo?(1) or does to run to the fuse/relay box then the main harness?(2) Link to comment Share on other sites More sharing options...
Pazuzu Posted December 2, 2015 Share Posted December 2, 2015 Had this same problem couldn't find solution on the internet. After 2 hours of reading the fsm, testing wires, using jumpers, etc, it came to me. I had the ects connector and fuel purge solenoid connector swapped. Fuel purge is battery voltage and a ground through a solenoid. ects is 5v reference signal and ground. So if you swap them the volt drop across the solenoid isn't much and your ecu thinks its super hot because of low resistance. This pegs your guage, which of course turns on your fan. If the op ran a wire around to the ects from ecu, his purge solenoid probably isnt working now. Sent from my 831C using Tapatalk Link to comment Share on other sites More sharing options...
1-3-2-4 Posted October 2, 2017 Share Posted October 2, 2017 Had this same problem couldn't find solution on the internet. After 2 hours of reading the fsm, testing wires, using jumpers, etc, it came to me. I had the ects connector and fuel purge solenoid connector swapped. Fuel purge is battery voltage and a ground through a solenoid. ects is 5v reference signal and ground. So if you swap them the volt drop across the solenoid isn't much and your ecu thinks its super hot because of low resistance. This pegs your guage, which of course turns on your fan. If the op ran a wire around to the ects from ecu, his purge solenoid probably isnt working now. Sent from my 831C using Tapatalk I know this is a old thread to bump but I have this same issue maybe the same issue for me but I can't really see how I installed the wire harness and the ECTS wire just "fits" to the sensor the purge solenoid has enough wire length.. I can check tomorrow after work. Link to comment Share on other sites More sharing options...
Pazuzu Posted October 2, 2017 Share Posted October 2, 2017 I know this is a old thread to bump but I have this same issue maybe the same issue for me but I can't really see how I installed the wire harness and the ECTS wire just "fits" to the sensor the purge solenoid has enough wire length.. I can check tomorrow after work.You can check with a multi meter if you want. One has 12v and one has 5v. Sent from my SM-G930P using Tapatalk Link to comment Share on other sites More sharing options...
1-3-2-4 Posted October 2, 2017 Share Posted October 2, 2017 You can check with a multi meter if you want. One has 12v and one has 5v. Sent from my SM-G930P using Tapatalk Had them backwards Link to comment Share on other sites More sharing options...
Pazuzu Posted October 3, 2017 Share Posted October 3, 2017 Had them backwardsGlad you figured it out. Thanks for updating your post also. Sent from my SM-G930P using Tapatalk Link to comment Share on other sites More sharing options...
RoscoeOutback Posted September 12, 2018 Share Posted September 12, 2018 This makes sense. The connectors fit either way. I have been chasing this same problem for a week after pulling manifold and harness to fix some drivability issues on my 08 OBXT. I have actually been stuck on the side of the road this whole time, and living in the freakin car. As it is almost midnight, I will wait till morning to test this and report back. Thanks pazuzu Link to comment Share on other sites More sharing options...
relative4 Posted September 12, 2018 Share Posted September 12, 2018 This thread to which you're necroposting has at least 3 complainants and plenty of curve balls. Pretty much impossible to tell what your problem is. You will get much better results if you start your own thread with a specific description of your problem. Link to comment Share on other sites More sharing options...
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