# Stumped **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [September 6, 2008, 3:37pm UTC](https://community.cartalk.com/t/stumped/19186 "2008-09-06T15:37:47Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![pikeboy](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@pikeboy](https://community.cartalk.com/u/pikeboy)\ **Post date:** [September 6, 2008, 3:37pm UTC](https://community.cartalk.com/t/stumped/19186/1 "2008-09-06T15:37:47Z")
I have a 1999 Mountaineer with a 302 and 97000 on it. Also fully loaded. I have a trouble code for a camshaft syncronizer sensor. Also, misfiring and what sounds like a valve tap. After replacing the sensor, the check engine light was out and it ran great until I turned the A/C on. The light went on, it misfired and the noise returned. After driving it for a few days without the air on, the light went out and it ran great. After putting the air on again the problem returned. I was told I need a syncronizer. Any help would be appreciated. ---
**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\ **Post date:** [September 6, 2008, 4:29pm UTC](https://community.cartalk.com/t/stumped/19186/2 "2008-09-06T16:29:55Z")
There may be a short between the two wiring systems. Use the wiring diagrams and check the wires, with a multimeter, for each system for the wires making connections (inappropriately) with each other. Ford has a technical service bulletin covering the correct installation procedures for the camshaft position sensor synchronizer, which may be the cause of DTCs P0340, P1309, and P1336: Article No. 02-22-1, dated 11/11/2002. ---
**Author:** ![pikeboy](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@pikeboy](https://community.cartalk.com/u/pikeboy)\ **Post date:** [September 6, 2008, 4:37pm UTC](https://community.cartalk.com/t/stumped/19186/3 "2008-09-06T16:37:14Z")
Thanks, I’ll give that a shot. ---
**Author:** ![Beadsandbeads](https://avatars.discourse-cdn.com/v4/letter/b/c57346/32.png) [@Beadsandbeads](https://community.cartalk.com/u/Beadsandbeads)\ **Post date:** [September 7, 2008, 12:35am UTC](https://community.cartalk.com/t/stumped/19186/4 "2008-09-07T00:35:43Z")
A '99 with a 302, are you sure? ---
**Author:** ![pikeboy](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@pikeboy](https://community.cartalk.com/u/pikeboy)\ **Post date:** [September 7, 2008, 2:05pm UTC](https://community.cartalk.com/t/stumped/19186/5 "2008-09-07T14:05:57Z")
Absolutely, with AWD. Funny you should mention that. I am the second owner and when I bought the camshaft synchronizer sensor the one that was supposed to fit had three contacts, the one on the truck has two. Turned out the one that fit was from a 3 liter Ranger, two contacts. My parts guy [dealership] said he’d never seen that before. He wondered if the engine had been swapped out. The original owner worked for Ford and bought it direct. ---
**Author:** ![pikeboy](https://avatars.discourse-cdn.com/v4/letter/p/ecae2f/32.png) [@pikeboy](https://community.cartalk.com/u/pikeboy)\ **Post date:** [November 23, 2008, 2:42pm UTC](https://community.cartalk.com/t/stumped/19186/6 "2008-11-23T14:42:36Z")
Turns out it was a short in the alternator. Problem solved after replacing. Thanks for the input.