hey everyone have a strange prob here, truck started and then didn't and then the next morning it started, since then we have no spark, have changed the distributer and coil and igniter, have done continuity check on the wires to coil and igniter, also dis. too and all the wires work also have changed the computer to one from the truck we pulled the motor from and it says code 51, but the computer that was in the truck just blinks consistantly when te1 and e1 are connected , any help would be great

 

Sounds like you've done everything 'cept for continuity to/from the ECU.

 

have actually checked continuity from ecu to the igniter and coil also the dist pick up too, also checked the ign switch and stater relay was replaced

 

also i forgot to mention it only sparks when you stop cranking

 

Does that mean you can push start it?
Turn on the headlights. Do the headlights go out while cranking?

 

Check the ECT sensor. I had this problem , changed the sensor and good to go. Also check the air gap.

 

no i can not push start it and now the check engine light won't even come on.

 

So let me get this straight:
It sparks when you stop cranking (engine still turning)?
You can't push start it?
You've checked the following for continuity:
Distributor->Ignitor->ECU->Ignitor->Coil
You've replaced the distributor, the ignitor, and the coil


The only obvious things here are the coil->distributor wire, but you mention that it does spark, just not when cranking...

If it sparks when you stop current to the starter, that indicates and electrical load problem, which is why I asked if the headlights still stay on when cranking...

We're missing something here...

 

Are your fuel injector triggering if not it's your crank sensor it's on the back of the distributer on the 22re if your fuel injectors are triggering determin if the coil is being triggered

 

to set things striaght i am testing spark from the coil, it did spark then it didn't i found a blown 7.5 amp fuse in the drivers kick area, then found a blown 30 in the relay center, the head lights stay on when cranking, and now the check engine light don't even come on when the key is turned.

 

This sounds just like the ECT Sensor. Check all the sensors and the air gap.

 

a coolant sensor would cause this to happen, just makes me wonder cause it has to be part of a circuit that is open, or is it a failsafe type of thing so that you don't overheat the aluminum motor, it's wierd cause the check engine lighte stoped working and that means no ecu power, or is the coolant sensor know to do this too, not a toyo guy just trying to help a friend out, ( when we swaped the motor we had to use our harness it was from 89 and the motor from 86, i had to 2 swap sensors on the far back of the engine on the "coolant block" in lack of better words, because the wouldn't plug into my harness

 

bump...

 

I don't think that's true (off the top of my head) - *think* the resistance of that sensor decreases as the engine temp gets warmer. If the circuit is open, it'll look like infinite resistance meaning a very cold motor...

86 and 89 injectors may not be the same in terms of indepdance, additionally the harnesses may be different in terms of having a resistor box for said injectors... Wrong injector/resistor box could hurt the injector drivers and/or ecu..

 

any update?