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1994 mustang gt 5.o wont start!!!
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ztac112711
New User
Jun 27, 2013, 12:57 AM
Post #1 of 2
(1521 views)
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1994 mustang gt 5.o wont start!!!
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i have a 1994 mustang gt 5.0 and it wont start. the engine turns over but wont start. was told it could be the distributor or the fuel pump relay but i dont know anything about engines and dont know how to check any of that . anyone have any advice???????
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Double J
Veteran
/ Moderator
Jun 27, 2013, 1:27 AM
Post #2 of 2
(1512 views)
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Re: 1994 mustang gt 5.o wont start!!!
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" i dont know anything about engines and dont know how to check any of that . anyone have any advice??????? "
Not much you can do if you dont have any knowledge of engines or diagnosing them except tow it to a qualified tech/shop for diagnosis/repair.
But ,if you feel up to it,here is a starting point...
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.
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