My sister has a 98 V8 "X" with 49,000 miles on it. It has a bad timing problem. I had it hooked up to a computer, and it came up with P0300 as a trouble code. It also said "multiple cylinder misfire detected" (DUH!). Has anyone had this problem before, and how was it corrected? I am thinking it may be the crankshaft position sensor.

ALSO......being only 3 years old, and only 49,000 miles, should this be covered under Ford's EMISSIONS warranty? I know they have to guarnatee it to pass emissions for a length of time, which I believe is 5 years (may be 7 now). Please, any information and any links of places/websites I can check codes, or warranty info would be VERY HELPFUL!

Thanks a bunch guys, you ROCK!!!!

Read this thread from Under the Hood - http://www.explorerforum.com/forums/showthread.php?postid=255152#post255152

This is misfiring at all times (warm or cold). Especially under light acceleration. It backfires from what sounds like the passenger side of the motor. Under more thought, I am wondering if the coil pack is messed up. I am going to take it to the dealer today and try to get them to AT LEAST give me a free diagnosis. She'd only had it for a month. WISH ME LUCK! Also......if you still have any comments, PLEASE leave them! Anything can help!!!!!

I just got back from the dealer. They said they would fix it! I'll be sure to post the problem when I get it back. It sounds like a common code (P0300).

Speaking of that, I was told this new OBD-II system is supposed to be more accurate than the old EEC-IV set-up. If this code (P0300) is turning up bad IAC solenoids, bad O2 sensors, bad crankshaft position sensors, etc (in other words - guess work!). It seems to me the exact opposite is true. I've never had a problem with the coding of the EEC-IV. The only time I had any guess work was when it told me the thermactor solenoid was not operating......there's two of them on my Mustang, so I had to simply get a voltmeter and test which one was bad. Not that anyone cares. If you read this far, thanks! LOL.

Shane

The EPA needs to disappear for a while so things can get perfected....or something. LOL

I am totally amazed at the lameness of the problem. It wound up being plug wires. Of all the stupid things! Maybe the OBD-II is smarter than I thought!

thanks,

Shane

hey Shane obdII only as good as the tech much easier to work with for the most part

Regarding the emissions warranty, your best source regarding it is in your warranty information booklet. The only two things that have a longer warranty than the standard 3yr/36K warranty are the PCM and the Catalytic converter on my '97. They are covered for 8yr/80K. I thought that my '86 Ranger had more items covered for longer than 3yr/36K than my '97 Explorer has. Vehicles for sale in California get longer emissions coverage than the rest of the US.