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1993 Mazda 626 wont start

Tiny
RONNIEMAC
  • MEMBER
  • 1993 MAZDA 626
  • 290,000 MILES
:

my 1993 mazda 626 v6 2.5L completely lost its timing and stopped and would not restart (it is a non interferance motor), found out the hydraulic timing belt tensioner had failed, replaced as a kit ( hyd. Unit tension roller and 2 idler rollers and timing belt) Fitted parts, lined up both cams and crank on correct marks rotated engine twice via crankshaft and all marks realigned perfectly. Did not remove distributor. Car will not start, have spark and plugs keep fouling up with fuel. Car was running well until this happened. Could fuel fouling have caused rings to lose compression. If so how can you restart with low compression? I am low on finances and any ideas would be greatly appreciated.
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Thursday, August 1st, 2013 AT 7:14 PM

9 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,896 POSTS
Does it sound normal when cranking? As far as the spark you have to the plugs, is it a blue snapping spark? Have you checked to make sure the fuel pressure regulator is working and not allowing too much pressure to build?

As far as compression, if it is low, the engine won't start. Have you checked compression to confirm that it is good? I don't believe this is an interferance engine, but something may have happened.

If you are getting fuel and spark and the timing is correct, it should run. However, if something happened to cause low compression, that would prevent it from starting.

Let me know.
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Thursday, August 1st, 2013 AT 8:19 PM
Tiny
RONNIEMAC
  • MEMBER
  • 5 POSTS
Vehicle cranks over at good rate, opened up an old spark plug to about 5MM and spark jumped ok, all cylinders show around 150 psi, tried aerosol starter fluid down intake and motor attempted to start but did not, have yet to buy a fuel pressure tester. Will keep you informed.
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Saturday, August 17th, 2013 AT 12:08 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,896 POSTS
It should have started for a couple seconds with starting fluid. Are you sure you are getting a good hot blue spark to the plugs? Since it tried to start with starting fluid, that leads me to believe that fuel is the issue. Let me know what you find, and let me know about the spark.
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Saturday, August 17th, 2013 AT 6:15 PM
Tiny
RONNIEMAC
  • MEMBER
  • 5 POSTS
Spark looks ok in daylight will check at night, still waiting for fuel pressure tester. Thanks again for your help
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Monday, August 19th, 2013 AT 8:24 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,896 POSTS
Glad to help. Let me know what you find.
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Tuesday, August 20th, 2013 AT 5:59 PM
Tiny
RONNIEMAC
  • MEMBER
  • 5 POSTS
Checked spark with spark plug, it is yellow and does not make cracking sound, then tested with proper spark tester and it would not spark. Could it be that when the hyd. Adjuster failed and the timing belt became loose and jumped cogs that the trigger wheel or the cps were somehow damaged or that something happened to the distributor? Thanks again for your help
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Wednesday, August 21st, 2013 AT 3:03 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Yes that is possible. Check ignition timing and check both the crank and cam sensors for damage.
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Wednesday, August 21st, 2013 AT 6:38 PM
Tiny
RONNIEMAC
  • MEMBER
  • 5 POSTS
Problem solved. I was getting a yellow spark only and not a blue one. Tried another distributor and car fired up right away. The distributor was fine before the timing went haywire. I don't know how but I can only assume that the erratic firing when the timing was lost somehow damaged the distributor. Once again thank you for your help.
Best Regards
Ron
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Wednesday, September 4th, 2013 AT 4:20 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,896 POSTS
I'm glad you got it fixed. Let us know if you have know if you have questions in the future.

Joe
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Wednesday, September 4th, 2013 AT 6:19 PM

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