J-Rat

iTrader: (2)

I just went blind reading all the no-spark posts. In about all of them, nobody says what fixed it. I have no spark on any line, but the 12V is present at the leading pack. Here is where I am at right now:

1: Swapped CAS, no fix.
2: Swapped AFM, still no good.
3: Changed plugs
4: OHMed out the appropriate fuses
5: OHMed Spark plug wires


I am about to run another ground from the motor to the chassis, and do the ECU regrounding. Anyone have any other advice?

Thanks in advance.

Rat

hypntyz7

All the instances of no spark i have seen have been solved by one of the following:

1) unplug or change afm
2) change ecu, check connections to and around ecu on large harness plugs
3) replace fuses: inside, 15A ENGINE fuse, outside 30 and 40A EGI fuses.
4) replace plugs

J-Rat

iTrader: (2)

Okay, here is where I am at...

I Changed the AFM ( I read a post where you had stated that), I slaved in a new ECU (but it wasnt the right one, it was from an N/A, I dont have a TII ECU to work with), OHMed all fuses, they checked good, and last but not least, I replaced the fuses. Oh and I re-grounded the ECU.

I got the idea to hook up my ECU tester to the diagnostics plug, having remembered that when you turn the key on, you should get 2 lights for a few seconds (as verified on my 87 N/A). I got NO lights on the 10th AE.

This car was running, and suddenly quit. So I am guessing the ECU. I assume that you cant swap a TII ECU for an N/A one. Also, all the warning lights are illuminated when the key is turned on. I dont think that is normal either.

This poor car has been attacked by people who have unplugged, or removed TONS of vacuum lines and the like. I may need some pics to reference by if you would be willing to assist...

Rat

RETed

Sounds like the ECU is dead...

You can test the ignitor/coils by grounding the - lead and disconnecting.&nbsp With the +12VDC side still connected, you should get a spark through the spark plugs.


-Ted

hypntyz7

Yeah you can for testing purposes, just dont go much past atmospheric...I have done it many times.

Normal as can be. IF yours *dont* turn on when the key is on, something is not normal...

J-Rat

iTrader: (2)

Can you be a little more specific? I am not quite sure what you mean.

rat

J-Rat

iTrader: (2)

Hmm...well I slaved in the N/A ECU and I still got no diagnostic lights. It almost seems like the ECU is getting no power, even though the fuses are good. My next move is to verify that 12vdc is getting to the ECU. Good thing the FSM has the pin-out.

Another thing hypntyz7, if you would be willing to help, I am gonna need to identify some missing vacuum lines. I dont have another TII handy to look at, however I will do my best to figure it out by the FSM first.

Thanks a lot for helping out, you and RETed,

Rat

J-Rat

iTrader: (2)

Soul Assassin is over here now, so hopefully we can figure this out..

Rat

J-Rat

iTrader: (2)

Soul Assassin is the MAN!!! We messed with various things, and while I was cranking, he noticed the the ECU lights were flickering (the LED's that I use for ECU codes), and the relays started clicking. So he decided to wiggle harnesses with the key on, to see if the lights would come on. He was messing around the main harness by the battery and BAM! Both lights came on bright, then went out after 3 seconds as normal. I removed the battery and peeled back the shielding and what do I find? Corroded wires, and one broken one... Its gonna take HOURS to reconstruct that section of harness, but who cares?

I am PRAYING that after I fix the harness, everything will be okay. Soul has pics of the area, he is gonna post them later.

Rat

J-Rat

iTrader: (2)

Dp

hypntyz7

Good to hear. Wiring is always suspect in my mind, because it's the least defective part, the hardest to diagnose and replace, and the least readily available. BUT, when you got to, you got to...

Keep us up on the progress...

J-Rat

iTrader: (2)

Wire is replaced and guess what...

WE GOT SPARK!!!!

Now just gotta figure out a way to get some ATF into the motor...Is there a better way then just putting it into the cylinders?

Rat

soul assassin

pics of the beast working on the beast

soul assassin

fubared section of harness

soul assassin

pic of the mechanic in training, for osme reason he kept staring at j-rats playboy pinups

soul assassin

the engine bay

J-Rat

iTrader: (2)

This thread has turned into a Soul Assassin fashion show!!

soul assassin

well i am more attractive than you

PJ-4.2L

Congrats, guys. Wish I was there.

PJ

soul assassin

this works on all the coils?

RETed

Yep, on all coils.



-Ted