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running rough( more at idle)

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Old 04-26-13, 08:31 AM
  #126  
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may just replace the engine or rebuild as a cold compression test last night showed about 75psi on each face front and rear rotors
Old 05-01-13, 06:39 AM
  #127  
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talked to a few people and they all say it should still start and run on that compression. just put known good primary injectors and ecu in and still wont start on first start.....
Old 05-01-13, 08:32 AM
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Man i am in the same boat. started before, wont run now. but with a FD and power FC.
Old 05-02-13, 12:54 PM
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I didn't read through this thread but what parts of the fuel system have you check?
Old 05-03-13, 06:18 AM
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fuel pump,filter,fpr,injectors and lines..i really dont think it is the fuel system as i can pull the primary rail out and watch fuel spray when trying to start. all pressures are good as well
Old 05-03-13, 10:09 AM
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Stock ecu or PFC?
Old 05-03-13, 11:16 AM
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Stock
Old 05-03-13, 08:18 PM
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So I read through this thread and the last one about this car, lol. Considering the mods that are on it you shouldn't be running the stock ecu. I'm not the first to say it. Between the exhaust, dual supra pumps, and all the gauges I wouldn't be surprised if the last owner ran an aftermarket EMS and just took it out when he wanted to sell it. I mean it has a wideband o2 sensor and a stock ecu

...anyway...so the OMP is removed yet still plugged in to clear the CEL. What are you running for premix?
How much are you mixing?
Are the injector holes plug properly?

And could you clarify something for me...in the mods list on the first thread you said it has a port matched LIM...you don't mean street port do you? extrude/honed?

Could you take a video of you trying to start it cold?...it would help a lot to be able to hear what's going on.
Old 05-06-13, 06:50 AM
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sure i can post a video tomorrow, the first post i posted was directly from the seller. as for port matched im sure its not ported imo just from driving. yes holes are plugged proper and premix i am using 1oz per gallon of idemitsu racing oil. i understand that a ems would be alot better but i dont see that keeping it from a first start
Old 05-08-13, 06:36 AM
  #135  
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jeez guys.....so yesterday i put the harness back in the car after checking every wire and still nothing unless some starter fluid was sprayed... so i went to check all voltages and resistance at the ecu pins and decided i would start with the engine coolant temp just to verify and it was reading .37 volts when it is suppose to be near 2.5 volts @ roughly 68 degrees. long story short found another coolant temp sensor and wam it fired up. let it sit over night and it started again this morning. guess the moral is to never trust new parts lol. anyways glad to have it starting again and in my situation the coolant temp sensor DID CAUSE A NO START CONDITION.
Old 05-08-13, 07:32 AM
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Congrats!
Old 05-08-13, 09:11 PM
  #137  
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If you walked through the FSM, that was one of the checkpoints:
Attached Thumbnails running rough( more at idle)-cranks_but_no_start.jpg  
Old 05-09-13, 06:58 AM
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Originally Posted by Mahjik
If you walked through the FSM, that was one of the checkpoints:
yea if you read through my thread that is one of the first things i did. i bought a new one but that one was bad as well....
Old 05-09-13, 06:59 AM
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and that also says partial combustion, i had none lol
Old 05-27-13, 07:24 AM
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thanks again for all who helped along the way!! car is running great now. just also found out my iac was bad as well. car runs alot better with it just blocked off and holds idle great. check engine light does come on and off at times but doesnt throw the car into limp mode so it doesnt bother me
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