My 01 with 179k on it has intermittently started no-starting. Cranks and cranks but won't turn over...the first time this happened a year ago, I replaced the CPS with an OEM unit and it worked fine for a year. Now recently its started doing it again. Here's what I've done:
No other symptoms besides not running. Everything else functions as normal and there aren't any warning lights...
Any idea what to try next? If I had access to an oscilloscope that may have been my next step.
- Replaced CPS with two different Napa replacements, no change
- Replaced CPS with junkyard unit, ran fine for about a week before showing current symptoms
- Verified continuity from Crank Position Sensor and Cam Position Sensor to the PCM
- Verified good resistance from replacement CPS
- Verified good fuel pressure
- ASD relay clicks when power is turned on
No other symptoms besides not running. Everything else functions as normal and there aren't any warning lights...
Any idea what to try next? If I had access to an oscilloscope that may have been my next step.