'94 80 series No Spark Trouble (looking for crank position sensor) (1 Viewer)

[bhagga424]

I've been chasing my tail for a while trying to resolve a no spark issues I've replaced the plugs, wires, ignition coil and igniter. A little bit of novice diagnosis on my part. I have not been getting anything from the CEL and have even jumped the OBD port to get a code, no light. I've noticed the tachometer doesn't bounce when turning over and I'm lead to believe my crank position sensor is bad. Does the '94 80 series have the crank position sensor in the distributor? And if my CEL is out would that interrupt any of the ignition circuit?

 

[Jgrauman]

If you have no cel light then you have no start. Have you replaced your fusible links?

 

[bhagga424]

If you have no cel light then you have no start. Have you replaced your fusible links?

Checked 'em all all for continuity they check out, but they do have a small amount of corrosion visible inside. Could that really cause a no spark?

 

[Jgrauman]

Yes. You are saying you have no cel light when key is turned correct?

 

[bhagga424]

Yes. You are saying you have no cel light when key is turned correct?

Yes, correct

 

[Jgrauman]

Maf issues can also cause this if you pulled the no no screws 1993 80 Series No CEL, No start

 

[bhagga424]

Maf issues can also cause this if you pulled the no no screws 1993 80 Series No CEL, No start

Oh very interesting I haven't tampered with the MAF before. After seeing that thread I did go unplug it (via the connector not the screws) and even an unplugged MAF wouldn't trigger my CEL

 

[Tools R Us]

If the bulb is good, no CEL = no power to the ECU = no spark, no fuel, no guna run. With the key to run does it have battery ish voltage at the B+ term in the diagnostic connector? If not, could be a bad connection, EFI relay, EFI fuse, fusible link, etc.

 

[bhagga424]

If the bulb is good, no CEL = no power to the ECU = no spark, no fuel, no guna run. With the key to run does it have battery ish voltage at the B+ term in the diagnostic connector? If not, could be a bad connection, EFI relay, EFI fuse, fusible link, etc.

Just checked, I've got battery voltage at the diag port

 

[slow95z]

Always start with the fusable link, always.

 

[Chopped80]

Did u ever find the issue I’m having the same issue but I’ve also changed the dizzy

 

[bhagga424]

Did u ever find the issue I’m having the same issue but I’ve also changed the dizzy

very very late but this issue was two parts. The CEL bulb was bad, I replaced that to finally read trouble codes and it was improbable crank data. I got a new dizzy and problem solved