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1989 4Runner fuel but no fire

Tiny
89_4RUNNER
  • MEMBER
  • 1989 ALL OTHER MAKES ALL OTHER MODELS
I have a 1989 4Runner 4WD V-6 with manual transmission. Driving home one day the engine just died. It will turn over but not fire up. I replaced the coil and igniter but there is still no spark out of the coil. What I was wondering is what voltage should I see on the wires coming from engine control module? Also how hard is it to replace the engine control module?
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Wednesday, May 16th, 2007 AT 10:09 AM

5 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Recheck wire harness on the distributor-do you have power to the coil positive.

Check the signal generator-also known as pick-up coil G1,G2,Ne/G- resistances that check out and wiring and ground are okay-

The computer has to get the Ne and G signal in order for it to send an Igt signal to the ignitor telling it to fire the coil and in turn the ignitor sends an Igf-which is spark confirmation to the ECM, On and On

Hope this help-Good Luck


https://www.2carpros.com/forum/automotive_pictures/12900_12900_muah1_5_2.gif

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Thursday, May 17th, 2007 AT 3:25 AM
Tiny
89_4RUNNER
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  • 3 POSTS
What should the resistence be on the pick-up coil? As for Ne/G, are you refering to negative/Ground?
I will pop my distributer open and check out my connections there, thanks for the help.

Tom
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Thursday, May 17th, 2007 AT 11:26 AM
Tiny
89_4RUNNER
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  • 3 POSTS
Turns out the electronics check out okay. But my distributor is not turning when the engine cranks over. There are no unusual noises when I crank the engine, it sounds like it always has when starting. Just not firing up. So is it possible the gear came off the end of the distributor or just a broken timing belt? If it is a broken timing belt, since I have cranked it over would it be out of time now? If so I think I will just put it in the shop to get fixed. With so much on the front of the engine I don't think I have the patience to do the job.
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Tuesday, May 22nd, 2007 AT 11:46 AM
Tiny
ZONER CHICK
  • MEMBER
  • 19 POSTS
If your belt snapped then it is most definately out of time. The starter turns the crankshat at the rear of the engine and crank pulley connects to the cam pulley with the belt, thus turning the camshafts. So when you try to start it the crank is turning without turniing the cam. The cam turns one time for every two revolutions of the crank, so if you do the job yourself you need to find TDC on the compression stroke and not the exhaust stroke, or you'll be off 180 degrees and you'll have to take it all apart to turn the crank one more full turn.
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Tuesday, May 22nd, 2007 AT 12:35 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be one of the two-if the timing belt/chain is gone it will throw the valve and ignition timing. If its the gear on the dist. All you have to do is put it on TDC compression and put in another
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Tuesday, May 22nd, 2007 AT 12:40 PM

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