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Old 07-11-2010, 05:06 PM
cobrajocky cobrajocky is offline
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Join Date: Jul 2010
Posts: 5
Exclamation '97 4.0L sometimes won't start, but "turns over"

Hi Guys (and Gals),
I hope you don't mind, but I have a 4.0 L Ranger in sheep's clothing - a Mazda B4000 Extra Cab, that;s obviously really a Ranger out of the same Ford Plant. However, there don't seem to be any Mazda equiv enthusiast "help" sites (Duh, wonder why?), so please help me if you would.

I have a 1997 Mazda B4000 V6 (same as a Ranger 4.0 liter) PU 2WD, only 80k miles, had the CPS replaced 20k ago. For no reason at all, on occasion with no predictability or reason, from cold only, the motor will crank and crank and crank but will not start for hours or the whole day or two. I'll come back later and bang it starts. Once or twice I've heard it backfire through the intake manifold. It has never done this hot, never two days in a row and it only has been doing this about a year, well after replacing the CPS. It may only happen once a week, or again after 2 weeks, or once a month! Sometimes it'll happen two or three days in a row! Nuts!?

We checked for spark when it does this and no spark, but there is a minor smell of gas. So I've replaced the distrib coil. I was going to replace the Ignition Module, but the Mazda dealer parts guys laughed and said they virtually have no history of these failing, none even in stock, even from the warehouse! The Mazda techs said they can't think of a specific reason and can't diagnose it unless it's dead ... wanted to have me leave it there, even though I told them it may not happen for a week or two or more! It's my only transportation, so can't do that.

What the heck is the problem with this truck????

Last edited by cobrajocky; 07-12-2010 at 11:00 AM.
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mazda b4000 won't start

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