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New Motor.. No Spark

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Old 02-13-2003, 06:03 AM
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ECU Error codes



3 - CAS (G signal)

13 - Pressure Sensor (Intake Manifold Pressure)



30 & 33 (those deal with emissions which some how I don't have :smirk:



another place to look at and still a non running car.. ah.. make it stop.



5am - wireless internet + notebook = sitting in garage searching forums for possible fixes
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Old 02-13-2003, 12:04 PM
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that g signal code is the cas, try another one or check the wiring



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Old 02-13-2003, 02:40 PM
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I did some testing on the CAS. G signal is 155.2 ohm resistance and the Ne is 155.7. factory specs are 100 - 200 ohm so the CAS is fine and dandy. I'm going to have to check the ECU and figure out if the signal is getting that far. If not.. rewire the G signal to the ECU.



The car is having troubles deciding what codes it wants to throw. I was testing the afm and was getting the right resitances that I should and sometimes the car throws code 8 (maf) and some times it doesn't. damn confusing. I used some electrical cleaner and went through and cleaned the connections to the MAF & Pressure sensor. I no longer get pressure sensor error but instead it's the MAF in replacement.



I can just tell I'm going to have alot of fun this afternoon with the car again :yum:
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Old 02-13-2003, 02:46 PM
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when you test the cas you need to spin it and you can watch the signal



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Old 02-13-2003, 02:51 PM
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do you know what the 'g signal' is excactly vs the Ne signal?



if i have the car in 'ign' and spin the cas by hand i'll get spark. I can place the cas back into it's little home.. and spin the motor by hand.. and get spark.. but the second i use the starter i don't get a spark from the plugs anymore.



I think i'm going to just rewire the CAS g signal.. it can't hurt and according the the FSM it's either a short / broken circuit.. or my ECU is shat
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Old 02-13-2003, 03:00 PM
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well thats wierd the ecu knows you have the key in "start" maybe you shoud pull that wire out of the ecu and see what happens?



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Old 02-13-2003, 03:05 PM
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which wire? the g signal wire?



I'ld guess if i pulled the wire i'ld get the same code but while i'm rewiring i might as well try. The FSM's steps for fixing a code 3 is like 1st check CAS resistance. 2nd check for wiring messup/short, 3rd replace ecu hehe.



I suppose when i removed my wiring harness it could have been a brittle wire. i tried not to bend the harness as little as possible in case something like this might happen. and it did



I don't know if this matters but, with my S-AFC w/ a charger stays on while trying to start the car.. when I don't have the car charger on and try to start the car the s-afc like reboot itself.



edit btw thanks for your help i appreciate it.
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Old 02-13-2003, 03:27 PM
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there is a wire from the key to the ecu that tells the ecu you are starting the car, maybe you should bypass that



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