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rpmdiag, Tech and Instructor
Category: Dodge
Satisfied Customers: 7740
Experience:  Since 1975
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2002 dodge caravan 3.3l new crank and cam sensor. put scan

Customer Question

2002 dodge caravan 3.3l new crank and cam sensor. put scan tool on it reads no cam or crank sensor signal and out of sync. starts and runs, but rough at idle. any suggestions?
JA: Does the vehicle stall at low speeds? Does it sputter?
Customer: no just runs rough at idle
JA: Are you fixing your Caravan yourself? What have you tried so far?
Customer: yes fixing it myself. put new cam sensor in with spacer and installed new crank sensor
JA: Anything else you want the mechanic to know before I connect you?
Customer: not that i can think of
Submitted: 8 months ago.
Category: Dodge
Expert:  rpmdiag replied 8 months ago.

Hi, I'm Ron and I will be helping you today.
Stand by for a moment while I prepare your answer.

Expert:  rpmdiag replied 8 months ago.

You can check the synch with a lab scope to verify this, but you also need to check compression for possible jumped timing.

See attachment of a good wave form.

Thanks, Ron

Customer: replied 8 months ago.
My bad. Forgot to mention both cam and crank sensors are brand new and installed to spec, as in the cam sensor was spaced for proper air gap. So I am safe to say that the timing is off? If the the timing was off wouldn't I still have signal from the crank and cam, but they would just be out synch?
Expert:  rpmdiag replied 8 months ago.

Like I said, they need to be checked with a scope as well as the compression test needs to be done. These tests will conclude where the problem is at.

Thanks again and please remember to rate me 5 stars and keep this link in case you need me again later on.


Expert:  rpmdiag replied 8 months ago.

If you are satisfied with my answer, I would greatly appreciate a 5
star rating now and I will still assist you after you have rated me
too if another question pops up. I don’t get credit for helping you
until you rate me.
Thanks again, Ron