Shoez

I had a similar problem with a 2000 CX613. Fault light would come on, truck would reduce speed until fault code reset. Initially just had dealership change settings to Not Reduce Speed with fault code, after which when fault code appeared truck would run as fast 80+ as you were willing to drive it.

Eventually we replaced the Speed Sensor wiring harness and the fault codes have not come back.

I have a 2000 CX613 with a 98 E7 460. I was told when I bought it that it had been ReMacked at 1.1, no paper work available. It is coming up on 1.6M. Since I’ve owned it (11/20) the #4 unit pump has had a slight fuel leak. It has been removed/replaced 3 times. We recently replaced the heads and rebuilt the jakes because of an oil leak where the heads meet. After about 2k miles I noticed my fuel mileage had dropped and I was making oil. It is definitely fuel not water getting in the oil.

My mechanic thinks he remembers that the head bolts around #4 cylinder had thread dope on them when he pulled them out. We did not use anything on them when we put them back in. 

I know when we did the exhaust manifold we used thread dope on those bolts as they thread into the oil galley. It is also listed in a service bulletin. Is there any service bulletin that I missed with regards to the head bolts or do I have a much bigger problem.