I have a 94 4runner w/ 3.0 v6 4x4. Its not getting spark at all but will turn over sometimes. We've tried the battery, igniter, coil pack, distributor, plug wires, spark plugs, and tested all wires for power along with checking all fuses and relays and ecu. I'm out of ideas. Please help!

 

How do you know its not getting spark? any codes??

 

Did the spark plug test. Pulled each plug and touched it to metal. No code reader. No cels

 

sometimes codes are stored in the ecm that dont trigger the cel. All you need to read codes on our trucks is a paperclip in the diagnosis ports. I believe its e1 and te1 to jump and then the cel will flash,

 

Pull the distributor cap and make sure its turning, and/or the valve covers and make sure the cams are spinning.

 

^^ ya that and check the afm and throttle position sensors per the fsm

 

It's in dummy mode when cranking, should get spark if the sensor is working sensor is in the distributor and (could be wrong) runs off the cam(s). (I didn't bother to look it up )

 

OK getting spark now but it now backfires out the intake manifold. Still won't start

 

Everything is spinning

 

"Black magic" or did you do something specific to get the spark back?

Set the ignition timing and adjust the valves.

*edit* reading fail. can't do a proper timing setting if it doesn't start. You can adjust the valves and verify the cam timing for a place to start.

 

How do I do that

 

Guessing you mean the cam timing? Not as easily as a 22re..

Pages Eg2-34 and Eg2-35, actually the whole section but the timing marks are on those pages.


And the v6 doesn't have adjustable rockers. (newbie mistake on my part I don't have v6..) It uses shims (not sure if these come in different sizes, someone will be along to correct me I hope..). Basicly you can't have the problem where the adjustments are wrong and the valves aren't sealing.
Manual pages Eg2-74, covers reinstalling the valves and shims.

Which means if the cam timing is correct and the distributor is in the correct position, you should have spark at the right time atleast while the starter is turning.

There are a few reasons you could get intake fires with correct timing, the worst of which is a stuck/bent valve.

And you didn't answer my question.
If you can't point to a "this was obviously bad and replaced" You're wasting your time and money throwing parts at it. You've replaced the sensor(distributor) and the computer, but did you test either one or the wires inbetween the two?

 

Good point Co 94 PU..... what motor, tranny etc are we dealing with??

 

Issue resolved! Distributor was out of time.