If the spark is still a strong blue spark you should be able to eliminate a bunch of items. We aren't allowed access to any electrical diagrams for the vehicles, but there are a couple of other sensors that could be present as well. For instance, you could think about a camshaft position sensor, now I suspect that this is probably the timing sensor that you refer to. There might also be a crankshaft position sensor and or a TDC sensor. Someone else might be able to give you a means for testing any of these sensors. How about it guys?

Answered by Bruce Hunt (expert)
3,803 answers provided

Hey allen,
Bruce makes a good point, one test for the crank sensor is w/ a DVOM, place it on ohms readout and test through the sensor, its only a good test if the sensor windings are "open" though. A labscope is necessary for further testing.

Can't remember if the '89 was distributor or DIS though, if its distributor then the ign module/pickup may be toast and DVOM testing again is sketchy, your local parts supplier may have a free module tester onsite and they may be able to help you there.

If its DIS then again crank or cam sensor may be in question. Its a tough call w/out some special equip!

Regards,

Chris

Answered by carundell
18 questions asked