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Car hesitating, RPM jumping


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earthtoAR
New User

Oct 19, 2016, 10:11 AM

Post #1 of 9 (880 views)
Car hesitating, RPM jumping Sign In

I have an '03 Dodge Stratus. New engine 1.5 years ago, new transmission 1 year ago and lots of other new parts.

When it's wet outside and only in the mornings, the car hesitates and the RPM gauge jumps. My mechanic said he noticed it happens when going from 1st to 2nd shift but is unsure what the problem is since he checked all the fluids and everything looks normal. In the afternoon, the car runs perfectly...never happens then. I almost got in a accident on my way to work, it happened while going 70 mph on the highway. Any ideas at all? The check engine light has also been on... emission vac I think


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 19, 2016, 10:51 AM

Post #2 of 9 (875 views)
Re: Car hesitating, RPM jumping Sign In

Connection at the crank sensor could be suspect.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



kev2
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Oct 19, 2016, 11:16 AM

Post #3 of 9 (869 views)
Re: Car hesitating, RPM jumping Sign In

"The check engine light has also been on... emission vac I think " get a scan and post ALL codes..
"while going 70 mph on the highway" really - might want to operate legally, save money.
someone will advise on the codes.
which engine 2.0, 2.4 or 2.7?


earthtoAR
New User

Oct 21, 2016, 8:20 PM

Post #4 of 9 (848 views)
Re: Car hesitating, RPM jumping Sign In

Code says camshaft position sensor. Bought a new one, car wouldn't start once the new one was on. Mechanic put the old one on and it started right up. Car is still doing the same thing.

Engine is 2.4


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Oct 22, 2016, 5:51 AM

Post #5 of 9 (828 views)
Re: Car hesitating, RPM jumping Sign In

What is the trouble code number? Does your mechanic have a lab scope? Can he capture the crank and cam signals when the problem is occurring at the PCM connector? If you replace a cam or crank sensor on one of those use dealer only parts. Seen lots of issues with the aftermarket position sensors. If the cam sensor had oil leaking out of it, you should also replace the sensor's connector. A good drive ability tech should be able to figure that one out.





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(This post was edited by Discretesignals on Oct 22, 2016, 5:52 AM)


kev2
Veteran
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Oct 22, 2016, 5:51 AM

Post #6 of 9 (827 views)
Re: Car hesitating, RPM jumping Sign In

post all the codes - knowing codes will help us help you
why did you change cam sensor?
Did you get sensor from Chrysler dealer?


earthtoAR
New User

Oct 22, 2016, 8:12 AM

Post #7 of 9 (817 views)
Re: Car hesitating, RPM jumping Sign In

P0340 Camshaft Position Sensor A circuit bank 1 or single sensor


kev2
Veteran
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Oct 22, 2016, 10:33 AM

Post #8 of 9 (802 views)
Re: Car hesitating, RPM jumping Sign In

the keyword is CIRCUIT - chancing the sensor would NOT be step 1.
did you check the connector, wiring, signal etc BEFORE spending ?
A code NEVER says change a part.


earthtoAR
New User

Oct 22, 2016, 2:16 PM

Post #9 of 9 (797 views)
Re: Car hesitating, RPM jumping Sign In

I didn't check anything, my mechanic did. I do not work on cars, just posting for some additional help.

It seems like ordering a part from the dealer instead of an after market part did the trick. The car is working perfectly but the real test is driving it tomorrow morning when it was guaranteed to act up before. Will post an update afterwards.






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