MLPS, maybe?? Sorry, long post....

98lincmk7lsc

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Sorry, this post is pretty long.....

Ok, so three times now, my 97 base has not wanted to start. It cranked, but just didn't want to start. The first time, I thought that maybe the battery just didn't quite have enough juice, so I got a friend with a Tacoma to jump it, and it started right up. Cool. I took it to get the battery tested and they said it was fine, but it had a lot of corrosion that should get cleaned up and that maybe that was the reason why. Next morning, it started right up, got to work just fine, but when I went to leave about 4-5 hours later, no start--it just cranked and cranked. I tried 4 different people's cars to jump it, and none of them worked. Since it started when I jumped it the first day, I naturally thought that was the problem this day. I figured that maybe their batteries just weren't quite up to par with what a Mark VIII needed. So....I went and got the 5 ton "stake bed" truck (has 3 red top batteries) to jump it with that. I pulled it up to jump it, but I was about a foot too far away. I get in the car and put it in neutral to push it up closer. While in neutral, I figure "What the heck" and try to start it, and it starts right up with no jump. Hmmm....peculiar, but I think nothing of it. It worked fine for about 2 weeks after that.....just long enough for me to forget about the whole thing. Well, the other day the same thing happened to me, except this time, I'm stuck at a pool hall at about midnight. I didn't even think to try and start it in neutral. An hour and a half later, the tow truck comes and takes me home. I get it in the driveway and think, "hey, what about neutral?!?" I put it in neutral and it started right up (and pisses me off for having to wait so long for a tow truck).

Anyway, after that long explanation, does this sound like the MLPS? I've got a mechanic friend that immediately offered that up as the reason as soon as I said that it started in neutral both times.

Thanks!
 
It could be the MLPS or it could be the crank sensor with the possibility of it being the cam shaft sensor.

The MLPS is not hard to replace. The crank is harder, but not too difficult. You do have to move the AC compressor out a little so the belt comes off, etc.

Next time this happens, unplug and plug back in the crank sensor. Its located next to the AC compressor at the lower bottom of the timing chain cover. Its a squeeze plug, so squeeze to unplug. I suggest you take a light to it and get familiar with it so if need be you can do it quick. If it starts every time after doing this, its the crank position sensor.

The neutral thing has me thinking MLPS though, as you suspect.
 
I think Unity is on to something here. About 4 years ago my 94 Mark wouldn't start. I never tried to start it it in neutral though. After trying the obvious things I knew with no luck, I had it towed to Lincoln. It was the crank sensor just like Unity said. Good Luck.
 

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