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| Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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03-09-2007, 06:24 PM
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#1 |
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No more nissan.
 
Join Date: Jan 2003
Location: RAIN, Washington.
Age: 40
Posts: 8,132
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No spark. Help.
Ok, heres the deal.
Before removing all my turbo components from my car, it ran. Perfectly. After I removed all the turbo components from my vehicle here are the steps I took: Rewired stock MAFS installed stock intake / exhuast installed 97 manual ECU installed stock injectors Now, I get no spark. I removed each individual plug and checked with the plug on the block while I cranked the engine. NOTHING ELSE WAS CHANGED. The only thing I can imagine possibly wrong is the ECU. I was using a 95 ecu before but I DID NOT repin the harness. The engine cranks, but does not fire. NO wiring was changed except the MAFS.
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03-09-2007, 06:32 PM
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#2 |
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No more nissan.
Join Date: Jan 2003
Location: RAIN, Washington.
Age: 40
Posts: 8,132
Trader Rating: (10)
Feedback Score: 10 reviews
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I've got a few other ECUs to try..
I didn't unplug anything other than the two connectors near the TB.. but I replugged them in. The ECU I have in there now (with the car not starting) was pulled from a wrecked car.. but I saw the car working 3 weeks prior. The car has NO functional EGR components on it. Rear 02 is NOT installed. It used to be Auto but I swapped it yeearrrss ago. Plugs are NOT fouled. Injector clips are snug. MAFS wiring is correct. None of the cylinders are sparking.
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03-09-2007, 07:10 PM
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#3 |
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Post Whore!
Join Date: May 2006
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if the harness is 100% correct (I'd at least pin out the injector pins), then it's got to be the ECU... if you've got another ecu layin around, play the swap game.
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03-09-2007, 07:25 PM
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#4 |
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No more nissan.
Join Date: Jan 2003
Location: RAIN, Washington.
Age: 40
Posts: 8,132
Trader Rating: (10)
Feedback Score: 10 reviews
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Well what I mean with that stuff is that.. JimWolf says to repin my 97 harness to fit a 95 ECU.. but if you look carefully at it.. its only a few EGR and AC things that are different..
I ran a 95 ECU no problem and I never touched any pins. (Car is a 97) http://jimwolftechnology.com/wolfpdf...WIRE%20MOD.PDF
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03-09-2007, 07:29 PM
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#5 |
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Post Whore!
Join Date: May 2006
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ahhh gotcha... see, I'm an S13 guy, I dont know about all that crap lol. OBD What?
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03-09-2007, 09:00 PM
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#6 |
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Post Whore!
 
Join Date: Sep 2003
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see if you have power running to the ecu and dizzy.... check the voltage on the power wires... mainly see if the ecu has power also... think about it... u turn the ignition on with the key there has to be a flow of positive current throughout the car.. and where theres a short in the system, then that would locate ur problem.... ill get back to you soon about this..
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03-10-2007, 01:58 AM
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#7 |
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Post Whore!
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are you sure yoru ignitor isnt just lose or something...
Is it getting voltage? time to get out the ole voltmeter.
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03-10-2007, 02:49 AM
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#8 |
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No more nissan.
Join Date: Jan 2003
Location: RAIN, Washington.
Age: 40
Posts: 8,132
Trader Rating: (10)
Feedback Score: 10 reviews
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yah I'm gonna bring the laptop with my FSM copy out to the garage tomorrow.
The car cranks so power has to be getting somewhere..
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03-10-2007, 01:27 PM
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#10 |
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Post Whore!
Join Date: Sep 2003
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the starter is not the issue... its having power to ur ecu and ignition, once u have ur key turned. thats the main idea... a engine can turn its engine but itll run rough(efi) once it starts up.. this is because of bad pick ups(sensors) either they are faulty or Disconnected. know what i mean?
just find out if ur main start up things are having an issues.. give me a call if u get lost evan...
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03-11-2007, 09:38 PM
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#11 |
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No more nissan.
Join Date: Jan 2003
Location: RAIN, Washington.
Age: 40
Posts: 8,132
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Feedback Score: 10 reviews
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PROBLEM FOUND!
What is EGI? Where does it ground? I'm blowing the 7.5A fuses all day long. I put in a 10A and blew that one too. The 15A made everything all better. However, I'd still like to trace the source of the problem. FSM has no EGI in the index but its ignition something.
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03-12-2007, 10:36 PM
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#14 |
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No more nissan.
Join Date: Jan 2003
Location: RAIN, Washington.
Age: 40
Posts: 8,132
Trader Rating: (10)
Feedback Score: 10 reviews
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Aight.. but what the fuck is EGI? And where does it get a bad ground from?
I can't find shit on the circuit diagram in the FSM. takes like 5 seconds of cranking before the car wants to start..
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