Postal_Dave
Active Member
- Joined
- July 14, 2021
- Messages
- 93
- Reaction score
- 98
- City, State
- Greenville, SC
- Year, Model & Trim Level
- 1996, Explorer, 4.0
So today I tried new wires going from the CKP to the computer. I disconnected the harness to the CKP and connected the new wire to the CKP and then cranked the engine to make sure it was making .9 volts AC. I then put pins in the back of the Computer harness and checked that there was DC voltage coming from the computer on those pins. I then connected the new wires to the computer, and tried cranking the engine, same as always, no spark. I connected my scan tool and then tried cranking while monitoring the RPM's. They got up to 213 RPM's then zeroed out.
So it's not the CKP, it's not the wires, it's not the computer. Something is telling the computer to not start, not to recognize the RPMs. The computer sees it at first, then something says, "Don't look!". The question is, What reading, or input, or lack of input would cause the computer to ignore the signal from the CKP?
So it's not the CKP, it's not the wires, it's not the computer. Something is telling the computer to not start, not to recognize the RPMs. The computer sees it at first, then something says, "Don't look!". The question is, What reading, or input, or lack of input would cause the computer to ignore the signal from the CKP?