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Old 07-16-2003, 04:39 PM
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message board for engine trouble in a non-hotrod....or can someone help?

Does anybody have a link to a site that provides this same forum for non-hotrods?

I am trying to help out a friend with car troubles
1987 mazda 626 w/2liter/manual trans...car died on the interstate, and was towed to my place...only info I have is that "it just died"...It will start and run for about 5 seconds then dies...fuel filter is not plugged and I have taken off the fuel line and the fuel pump is pumping...at least while the engine is cranking...owner is a single mom and short on funds so I don't want to replace a $130 fuel pump if it could be something else...
if anyone could point me in the right direction...or module...that would be great


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Nasty

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Old 07-16-2003, 04:54 PM
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Don't worry about it being a non-hotrod post. Alot of us have our daily drivers that aren't hotrods. Anyway, it could be an electrical problem. I have a 1994 Nissan Altima that died on me a few years back. Come to find out, my alternator was fried and it couldn't charge the battery enough. Also, the alternator couldn't keep the current to the plugs and computer and such, so it wouldn't run. Make sure you are getting a good spark to all 4 plugs and check the plugs wires and dist. cap for wear and corrosion. These computer controlled cars can be a pain in the butt sometimes, but you'll get her going. Let us know how it goes!
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Old 07-16-2003, 05:03 PM
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Without much to go on I would say a good place to start would be to try and get a fuel gauge on her. You could have an electrical problem allowing the pump to operate in the 'crank' position but then shut down as soon as you release the key to the 'run' position. You could be losing an input to the engines computer (cam sensor, etc.) causing it to shut down either the pump, injectors, or ignition. I would try and get your hands on a Haynes/Chilton maunual and see if there are any pinpoint tests you can do for this symptom.

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Old 07-16-2003, 06:20 PM
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are 87 626es even FI cars? It sounds electrical none the less.
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Old 07-16-2003, 06:29 PM
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If I'm not mistaken, '86 was when the 2.0 went fuel injected. But I could be wrong. That's why a good manual is a must.

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Old 07-16-2003, 06:57 PM
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it is injected....
during the 5 or so seconds it revs fine and sounds good...
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Old 07-16-2003, 07:15 PM
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Arrow

Even though the pump is pumping when you crank, you might do a pressure check on the pump, they fail at the most inconvenient time (as if there is a convenient one). I also double the need for a good manual.
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Old 07-16-2003, 07:20 PM
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Excuse my typing but I ment to type 'fuel pressure gauge' instead of 'fuel gauge' in my first post. Like woodz said, the pump could just be failing or the computer isn't keeping it on. Keep us informed.

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Old 07-16-2003, 07:55 PM
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This particular car has an auto shutdown feature which will shut down if the oil pressure is too low. I had an 87 Mazda 323 wagon that did this to me long ago, and that's what it was. We had to replace the engine, but may not be your problem. Just a thought.
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Old 07-16-2003, 08:58 PM
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The engine is full of oil...don't think it has a oil pressure gauge and didn't see any idiot lights come on before it shut down...I'll check tomorrow...I have a fuel pressure gauge but no fitting to put it inline...I'll come up with something to check that also... a manual would be great but this car isn't anything I would own or plan to...so im not going to buy one...I know people at the dealerships here to look at manuals for my cars...but there are no mazda dealers here...
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Old 07-17-2003, 02:45 AM
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Could it be an exhaust restriction?
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Old 07-17-2003, 05:19 PM
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well here's what I know today...
Fuel pump doesn't pressurize the system when you turn the key before you start the engine like my other cars..? but I don't know if it is supposed to either... My fuel pressure gauge is for the carb on my car and only goes to 15lbs...thought I might be able to see a drop in pressure...NOT.. spins around to the stop pin at zero and stays there...there is no exhaust restriction, looks to be whats left of the original muffler...
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Old 07-17-2003, 07:36 PM
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Hate to say it ... but you need a fuel pressure gage that goes high enough to tell if that's the problem. If it is, there are several things that will make it shut down after a few seconds, but first you need to know if that is what's going on.

STFINNEY is right ... all of us are wrestling with daily drivers. Its all part of the game!
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Old 07-17-2003, 09:12 PM
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if all else fails try these guys www.batauto.com (<~~~ read disclaimer, then use ~~~>) http://www.batauto.com/articles/ (or click articles in the top left corner) its an auto tech site ran by a couple of ASAE mechanics that have thier own shop. Yes there are ads on it & no I havent used it yet, but have had friends tell me about it..........joe
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Old 07-18-2003, 04:53 PM
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well i borrowed a gauge...carries 35 psi...no drop in pressure when it dies... have talked to about every mech-en-nec I know...no answers...about ready to throw in the towel and tell her it runs fine..except she just has to drive there 5 seconds at a time...

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Nasty
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