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Cam Sensor Chronic Issue 900 1993

posted by  AVL940T on  Wed Jul 24 16:20 CST 2024
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I haven't had any updates to post since Monday because I was waiting on a part. Tuesday I went to work on the car during a break in the weather and I wasn't smelling gasoline and I wasn't getting intermittent starts like I did on Monday. I decided to focus on the fuel pump relay and it appeared to be dead. I ordered a cheapo from Amazon and it arrived today. The car now starts ands runs as before.

Tomorrow I will reinstall the original Bremi CPS to determine if that is good or not, but upon inspection my fuel pump relay definitely has cracked soldering on the circuit board. It likely has been failing over time and then died suddenly last week.

About the tachometer needle, it still doesn't budge on startup and I know that it did after replacing the CPS last year. In the FAQ, regarding the Hall Sensor on earlier distributors it says: "Quick Hall sensor test: [Note from Dave] the tachometer needle does jump slightly as you crank engine over if the Hall sensor is working, but the needle lays dead if the sensor is not working."

I know my car doesn't have a Hall sensor in the distributor, but the Tach jump on startup is also how you know if the cam sensor is functioning on a 7.3 Powerstroke diesel engine and it has been mentioned somewhere in relation to the B230FT and the crank sensor. It's how I knew to suspect my CPS last year when it died.

If I learn anything else I will update. I can add that the Bougicord CPS has the lowest resistance between pins 1 & 2 of the three I've measured (.171) and if I don't go back to the Bremi I will be installing the Bougicord.

Thanks to all for your help, AG






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