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Old 01-03-2011, 10:27 AM   #1
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Engine Stutter

Hey everyone,

I have this problem with my engine that started recently. While driving, at about 3.5k RPMs, the engine starts to hesitate and the car bucks real bad. There are no other driving problems until that RPM level it seems.

I recently replaced my cam position sensor and was wondering if maybe I didn't get it timed right when I put the new one in, or maybe something else is going wrong.

Any input would be appreciated, Thanks
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Old 01-03-2011, 11:22 AM   #2
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Re: Engine Stutter

I dont know anyting about installing new cam sensor but my car reacted that way once when a clamp came off of the CAI near the throttle body making a 1/2" gap. Vacuum line leak or loose tubing when working on car?
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Old 01-03-2011, 05:26 PM   #3
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Fuel filter
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Old 01-03-2011, 06:49 PM   #4
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Re: Engine Stutter

I was thinking fuel filter too, but I thought that because it started as soon as I replaced the synchronizer that it might have something to do with that. But I was also thinking that if the cam synch was off then it wouldn't run at all.

I guess my next step is to change the fuel filter and hope for the best.
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Old 01-04-2011, 08:32 AM   #5
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Re: Engine Stutter

i would figure a bad or miss-installed cam sensor would trigger a code, plug up your tuner and read the codes to see if anything is there even though you dont have a CEL light
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Old 01-05-2011, 12:36 PM   #6
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Re: Engine Stutter

So I changed the fuel filter yesterday and the problem is still there. I also scanned my computer and it wasn't giving me any codes to work with.

When I was driving it today I was just trying to see what caused it. And from a stop, it will go from idle to around 5k Rpms and then shift without problem. But on the highway it will start hesitating at around 3k. I can't understand it, any other ideas?
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Old 01-05-2011, 02:22 PM   #7
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Re: Engine Stutter

if it just started after the cam sensor install revisit the work and check over everything
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Old 01-05-2011, 09:38 PM   #8
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Re: Engine Stutter

Does it feel like it's surging at certain rpms?

Also, is your car an auto?
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Old 01-05-2011, 11:41 PM   #9
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Re: Engine Stutter

Quote:
Originally Posted by SpectorV View Post
if it just started after the cam sensor install revisit the work and check over everything
^ Yeah it wouldn't hurt to do that. In addition how many miles are on the car? If you have say 85K plus, have you replaced the plugs and checked the coil packs?
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Old 01-06-2011, 08:36 AM   #10
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Re: Engine Stutter

Make sure you didn't damage any of the teeth on the reluctor ring when installing the sensor
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Old 01-10-2011, 01:37 PM   #11
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Re: Engine Stutter

Well my coil pack was replaced about a year ago, but nothing was done with the plugs or wires. My car is an automatic with about 75,000 miles on it.

The only reason I can't understand this is that I would think that if the cam synch was off, it would cause problems across every rpm level and not just high rpms.

I guess I'll just have to check my work and make sure I got it timed right. Thanks for all the input.
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Old 01-13-2011, 09:49 PM   #12
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Re: Engine Stutter

Yah check that for sure. I only asked if you were an auto because my sister had an impala that had the same issues...surging in the higher rpms...and it was the transmission. I would hope that isn't the case since your car only has 75k miles but you never know...definitely check your cam synch and such first, then if it continues, consider getting a diagnostic for your transmission.
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Old 01-13-2011, 10:41 PM   #13
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First of all,why was the cam sensor replaced? Was it to correct this issue or another issue?
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Old 01-14-2011, 10:13 AM   #14
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Re: Engine Stutter

camshaft sensor. i had the same problem. does your exhaust putter when you try to accelerate?
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Old 01-18-2011, 11:41 AM   #15
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Re: Engine Stutter

I had the same problem and it was just the coil pack. it would run fine if i gas hard but if i was just going down the highway at a idle it would sputter a little.
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Old 01-18-2011, 11:48 AM   #16
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Sounds like you may have a coil breaking down. If, when you load it up it gets worse, us the coil. Go find a hill get it up in fourth and roll into the pedal without causing a down shift, if it starts missing you have a coil breaking down.
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