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Thread: Car starts but won't hold idle, plus weird datascan info

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Posts: 1-2 of 2
2013-05-04 23:31:55
#1
Car starts but won't hold idle, plus weird datascan info
B13 SE-R with JDM 10:1 SR20DE + USDM intake manifold, car starts but won't hold idle. Will rev up to 16-1700 and slowly rev down to 1k and then after that has trouble maintaining idle speed and shortly (5 seconds or so) dies. ECU is throwing a coolant temperature sensor circuit code that no matter what I do I can't get rid of. Also, when car is cold, and I turn it to the on position, Nissan Datascan shows the water temp going up from 100* at a steady continuous increment of 1.2* or so until it reaches 176* and stays there. This is with the car off and the engine cold. MAF reads .82-84 with car off. With the car on and revving the engine to keep it alive, it will do the same thing, but the temperature never goes beyond 176. I've swapped the ECU but the problem still persists. Swapped coolant temperature sensors with no luck. I can't hear or see any vacuum leaks. I think the problem is definitely electrical but I have no idea where to start. CTS plug was effed up a little so I wired in another, but nothing changed. Disconnecting TPS the engine revs a little higher on startup but still dies. Disconnecting MAF doesn't improve anything.

Any ideas?
2013-05-05 00:35:34
#2
Nvm, hearing a vacuum leak, will check it out tomorrow... but question still stands about the CTS issue.
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