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Old 07-24-2011, 05:04 PM
vagabond65 vagabond65 is offline
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Default CEL on - for the 2nd time

Hope this is in the right spot. I've a question & from what I've seen in the past this is more than likely the place to get a helpful answer.
I've a 99 Ford Ranger with the Flex Fuel 3.0 engine with 98k miles that I recently had the cam position sensor replaced after the Check Engine light came on & had a code P0340. The truck ran fine before & after the sensor was changed. 3 days later the check engine light comes on again.
For the last few months, intermittently upon acceleration it will make a noise that I can best describe as a static type of noise that sounds like it's coming from the rear of the engine(?). It will do it for a second or so then maybe again then stop. It seemed to have become more frequent in the weeks before the light came on. I wouldn't interpret the sound as chirping but some might I guess & I've heard that that could be a noise indicating the cam synchronizer needs to be replaced as well. Could this be the cause of the CEL coming back on?
Any thoughts or ideas? I'm calling the shop that worked on it tomorrow but would like a little help if possible.
BTW, I had it tuned up & had new plug wires put on 3 days before the light came on the first time & I believe the Oil pressure sending unit is going bad as it is slow to show pressure when it's cold outside(has been doing this for over a year now), but other than that I've no issues with it at all. Thanks!
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Old 07-24-2011, 05:12 PM
djfllmn djfllmn is offline
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Default Re: CEL on - for the 2nd time

what kind of cam synro did you put in...if it wasnt a motorcraft one it could be toasted again
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Old 07-24-2011, 05:54 PM
vagabond65 vagabond65 is offline
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Default Re: CEL on - for the 2nd time

It was the cam positioning sensor that was replaced, not the synchro; that hasn't been replaced. I don't know the brand since I had a shop do it.
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Old 07-24-2011, 06:42 PM
Fordzilla80 Fordzilla80 is offline
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Default Re: CEL on - for the 2nd time

If your cam sync is bad as well, it could be tearing up the new sensor, which might not be able to count the revolutions any more, hence the code. Usually when you get CPS codes, and you're over 70,000 miles, it's a good idea to go ahead and replace the cam sync as well with a Motorcraft unit.
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Old 08-06-2011, 10:30 AM
greenehorn greenehorn is offline
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Default Re: CEL on - for the 2nd time

My ranger did this for three years. Bad miss at 4000 RPM's. Replaced the cam sensor....but not the cam sync. Replaced plugs, wires, dip tube sensor, maf sensor, took off intake and cleaned it, and put on cam sensor. All of these ended in a CEL once in a while...but not all the time.

Finally, I put in a new cam sync and my truck drives like new with 207,000 miles on it.

I bought the cheap cam sync because I did not want to pay for the FMC brand if that was not the problem. I will buy a new FMC Cam Sync in a couple of months and replace the cheap Chinese cam sync.

If your ranger misses at 4000 rpm's or near that rpm....replace the cam sync. My cam sync did not make a noise...yet it was still bad!!!!!


3.0L Cam Sync replacement:

1. Locate cam sync on rear of engine behind intake pass side
2. Remove sensor (two screws--3.5 mm)
3. Take a picture of Cam Sync...note orientation of outer housing and moving parts on the inside of the Cam
4. Remove retaining bolt on cam sync 10mm
5. Remove cam synch
6. Oil moving parts on new cam sync
7. Install Cam Sync Make sure it is in the EXACT same place as old one
8. Install sensor
9. Start engine

01 Ranger 3.0L
94 Ranger 4.0L
11 Focus
07 Explorer 4.6 4x4

Last edited by greenehorn; 08-06-2011 at 10:24 AM. Reason: Hints on replacing cam sync
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