NO START

Tiny
DLCARL
  • MEMBER
  • MAZDA MPV
1989 Mazda MPV 4cyl 2w/d. My car quit while driving. It quit as though it ran out of fuel. I had it towed home. It sat for 2 hrs. I tried to restart, it started, but only ran for 1 or 2 seconds. No restart. Replaced fuel filter. Started briefly. No restart. Checked fuel pressure, it's fine. Checked for spark, got blue spark. Sprayed small ammount of starting fluid into cylinders. Fired briefly till fluid burnt off. Checked for spark again the next day. No spark. Tested coil with ohmmeter, failed primary resistance test. Replaced coil. No start & no spark. Had vehicle towed to repair shop. He got it running using my origional coil & told me the new coil was no good. Parts store tested it and said it was good. Anyway it ran for 2 days quit again and now Im back where I started. So far have replaced coil twice, new fuel pump, cap, rotor, and the pickup coil has been tested & passed. It ran great for those 2 days.
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Monday, May 28th, 2007 AT 9:21 AM

4 Replies

Tiny
DANCARLSON
  • MEMBER
Take out the fuel injector and clean the screens.
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Tuesday, May 29th, 2007 AT 5:50 AM
Tiny
DLCARL
  • MEMBER
This has been done. Also cleaned throttle body. Checked for top dead center, replaced ECU with used (tested) unit. Checked & cleaned fuel pressure regulator, cleaned injectors. Sometimes get spark sometimes no spark. By the smell of the plugs there's no fuel being delivered. Stumped.
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Tuesday, May 29th, 2007 AT 3:30 PM
Tiny
DANCARLSON
  • MEMBER
You have got a real thinker on your hands. The only thing I can come up with is a fusible link or a wire that has broken off inside its casing. See if you can get a hold of a wiring diagram and look it over. If it were a newer vehicle everyone would be saying 'computer'. The fuel pump control unit may be a place to look for the fuel problem, a broken wire or a fusible link to the coil, a bad ground. You might find that you are looking at 2 different problems with 2 different solutions. The spark sometimes there sometimes not sounds like a broken wire. Sometimes it gets bumped and is making a connection other times the ends are too far a part to allow a current. I know that it sounds dumb but the wiring is almost 20 years old. I wish I could help more.
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Wednesday, May 30th, 2007 AT 7:02 AM
Tiny
JACK42
  • MEMBER
I would go back to the module or pickup, electronics can fail intermittently. Test good one minute and not work the next
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Thursday, May 31st, 2007 AT 8:23 AM

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