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94 chevrolet C 1500 fuel injectors
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SMO
New User
Oct 15, 2009, 6:45 AM
Post #1 of 6
(2917 views)
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94 chevrolet C 1500 fuel injectors
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injectors not working , therr are not "clicking" when turn over motor, fuse good ,replaced fuel filter , fuel pump is working only 2 years old ,sometimes start, then wont start had been idleing rough , now nothing , 268k miles
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 15, 2009, 8:20 AM
Post #2 of 6
(2911 views)
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Re: 94 chevrolet C 1500 fuel injectors
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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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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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SMO
New User
Oct 15, 2009, 8:39 AM
Post #3 of 6
(2907 views)
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Re: 94 chevrolet C 1500 fuel injectors
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engine runs If spash of gas is added to carb, no power to injectors , chev off to see mech., on the hook now, thanks I will post his findings
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 15, 2009, 8:45 AM
Post #4 of 6
(2903 views)
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Re: 94 chevrolet C 1500 fuel injectors
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If you have no power to your injectors with the key on, check your fuses.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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SMO
New User
Oct 25, 2009, 10:55 AM
Post #5 of 6
(2871 views)
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Re: 94 chevrolet C 1500 fuel injectors
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fuel pump ok, replaced fuel pump relay 20$ part , had rusted ground at tank also. runs now
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