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96 timing issue possibly

if you disconnect the optic sensor and leave the CPS plugged in and it doesn't start that would lead to a bad CPS sensor, but if you disco the CPS and leave the optic connected and no start, that is a bad optic.

basically the engine will run without one or the other but not both. it will take longer cranking to get it started though.

based on what you said..
chevyCowboy said:
it starts the same whether the CPS is plugged in or unplugged
Click to expand...
This says the CPS is bad or the wires to it are damaged. look at the sensor (on the drivers side bottom of the timing cover) and see if there is any oil seepage in this area. clean well with some brake cleaner. the wires will run from the CPS up the front of the block where the connector is right near the front drivers side valve cover.

also, is this on your 95 or 2000 rig? if it's the 95, look and see if you still have the noise filter connected inline on the optic sensor, if so, remove it and connect the optic connector direct to the IP. that noise filter causes more grief than it's worth.
 
dbrannon79 said:
if you disconnect the optic sensor and leave the CPS plugged in and it doesn't start that would lead to a bad CPS sensor, but if you disco the CPS and leave the optic connected and no start, that is a bad optic.

basically the engine will run without one or the other but not both. it will take longer cranking to get it started though.

based on what you said..

This says the CPS is bad or the wires to it are damaged. look at the sensor (on the drivers side bottom of the timing cover) and see if there is any oil seepage in this area. clean well with some brake cleaner. the wires will run from the CPS up the front of the block where the connector is right near the front drivers side valve cover.

also, is this on your 95 or 2000 rig? if it's the 95, look and see if you still have the noise filter connected inline on the optic sensor, if so, remove it and connect the optic connector direct to the IP. that noise filter causes more grief than it's worth.
Click to expand...
it's the 96 and I think it is still there. I had replaced the cps with a known good one not to long back and still had some issues intermittently so I'm thinking it's a wiring issue. going to dig in deeper tomorrow
 
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