Mechanics

FORD EXPLORER SPARK PROBLEM

1992 Ford Explorer • 169,000 miles

Is it possible for a timing chain to jump a link on a 92 ford explorer sport with a 4.0 liter v6 manual
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Little nuge
March 19, 2013.



Sure it's possible but "likely", no so much.

Have you taken a complete compression test.

Wrenchtech
Mar 19, 2013.
No. I was driving and all of a sudden the engine shut off and wouldn't start back up. We haven't really started tearing it down yet.

Tiny
Little nuge
Mar 19, 2013.
It sparks. We don't know if its on time. Is there a way to check the timing even if we don't have a timing light that works with this explorer

Tiny
Little nuge
Mar 19, 2013.
Don't go tearing anything apart yet. You need to do some testing to find out what is going on. First.

All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.

Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

4) If all of these things check good, then you would need to do a complete compression test.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.

Wrenchtech
Mar 20, 2013.
Thanks for your help. Ill get back to you when I get it figured out

Tiny
Little nuge
Mar 20, 2013.