S-5 Turbo wont start, no spark, and no fuel
#1
S.S.S.(sexy,silver,seven)
Thread Starter
S-5 Turbo wont start, no spark, and no fuel
Well let me start out by saying im not just some rag tag mechanic, but im not a know it all, and this car is kicking my ***. here is a list of things ive checked
CAS ohmed out good about 150, and i have extra's
ohmed out the wires to the ECU good
Have 12 volts at the coils, grounds good
12v at ECU, and grounds are good
The engine and harness are grounded
Changed the ECU, and it wont start, and im supposed to be driving to Colorado today. REALLY NEED SOME HELP HERE GUYS PLEASE!!!
CAS ohmed out good about 150, and i have extra's
ohmed out the wires to the ECU good
Have 12 volts at the coils, grounds good
12v at ECU, and grounds are good
The engine and harness are grounded
Changed the ECU, and it wont start, and im supposed to be driving to Colorado today. REALLY NEED SOME HELP HERE GUYS PLEASE!!!
Last edited by turboIImadman; 03-15-10 at 01:38 PM. Reason: grammer
#2
Moderator
iTrader: (1)
When you tried to "pull codes" what response did you get? I gather you connected a spare CAS and connected it up and spun it to check if you had spark? Did you pull the plug wire(s) from the coil bore to check for spark. If you pulled the plug from your ECU which houses pin 1V and with the key to "on" do you get a low voltage reading or a very high one. If it reads close to 12 volts the trailing coil is damaged.
#4
Moderator
iTrader: (1)
Did the light not work after you used the jumper wire to pull codes or after you "just" turned the key to on? Perhaps disconnecting the negative battery terminal for 30 seconds to reset it might work. Do you have the newer ECU in? If so, replace with the older unit and try again.
#5
REST IN PEACE DAVE!!!!!!
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are you getting spark through the wires? take off a wire sticka screw driver in it set it next to your strut bolt. no metal from screw driver touching the car when you crank it do you see spark arching to the bolt?
do you have fuel pressure?
do you have fuel pressure?
#6
S.S.S.(sexy,silver,seven)
Thread Starter
yes i'm getting great fuel pressure, and I'm not getting spark. I have an extra spark plug that i have grounded out to test it. Just no injector pulse or spark
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#8
Moderator
iTrader: (1)
Why not hook up another CAS to check for spark and remove the plug wires from the leading coil bores and test them one by one and check if the issue can be narrowed down and unequivocally eliminate the plugs and plug wires. And are your coils bolted properly to the fenders and receiving the "proper" ground source.
#9
S.S.S.(sexy,silver,seven)
Thread Starter
I tried pluging in another CAS, and there was no spark when i spun it by hand with the key on. I'm also getting power to the main relay. I'm going to try all 4 CAS's i have
#11
S.S.S.(sexy,silver,seven)
Thread Starter
Update. I am now able to get one spark with the MAS disconected, and i shut the key off, and then start again, and only one spark from the leading. I ohmed out my MAS, and its within specs on the MAS side, but i did not check the inlet air temp side of the MAS. Any ideas guys?
#12
S.S.S.(sexy,silver,seven)
Thread Starter
I pulled codes off of my N370 ECU and its just emissions stuff port air, and split air. Check engine light does not work on the knight sport N374. Could it be my Mass air flow sensor? I'm at my wits end here.
#14
S.S.S.(sexy,silver,seven)
Thread Starter
yeah i know. I cranked it about 3 times so that the ECU would Log the codes. I have a friend that i recently met that has the same car as mine 89 turbo, so im going to take some voltages, and plug my MAF sensor into his car, then maybe the ECU if he will let me. I always appreciate the input man, thanks
#18
HAILERS
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That relay must still be functional 'cause you say you turned the engine over with the starter. That relays intermal contacts pass the Start power from the key to the starter solenoid, so obviously that part works. T
That relay only pulls in and seperates the internal contacts IF a THEFT is sensed by the Theft control unit.
Go to your boost/pressure sensor and pull it's elect plug off. Key ON engine OFF.
Now also pull the elect plug off the AFM.
Now Measure the voltage on the brown/white wire of the boost/pressure sensor. Should be approx 5vdc.
Now while measuring that brown/white wire with key ON engine OFF, put the elect plug back on the AFM. Does the voltage stay the same? Increase? Or????????
And as a clue/curiosity ............with all elec plugs connected, STARE at the tach needle. Now turn the key to just ON. Did the tach needle barely bump up just one time? Or not. Try several times to be sure.
That relay only pulls in and seperates the internal contacts IF a THEFT is sensed by the Theft control unit.
Go to your boost/pressure sensor and pull it's elect plug off. Key ON engine OFF.
Now also pull the elect plug off the AFM.
Now Measure the voltage on the brown/white wire of the boost/pressure sensor. Should be approx 5vdc.
Now while measuring that brown/white wire with key ON engine OFF, put the elect plug back on the AFM. Does the voltage stay the same? Increase? Or????????
And as a clue/curiosity ............with all elec plugs connected, STARE at the tach needle. Now turn the key to just ON. Did the tach needle barely bump up just one time? Or not. Try several times to be sure.
#20
S.S.S.(sexy,silver,seven)
Thread Starter
I've got a starter triger hooked up to start it, but i have tried with the key just to make sure. I live in phoenix now, so im driving up to prescott tomorrow to work on the car. I checked the reference voltage at the boost sensor, and it was good. I'm so close to getting 5 gallons of RX-7 begone from the gas station...
Motor is brand new
Thank you guys so much for input and help
Motor is brand new
Thank you guys so much for input and help
#22
S.S.S.(sexy,silver,seven)
Thread Starter
Ok so will a turbo model start without a knock sensor hooked up? The wiring diagram shows that the MAF, O2, and CAS sensors are all linked by ground, so... I'm re wraping my harness and installing the knock sensor tomorrow, All the wires ohmed out to 0 or .01 ohm's.
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