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kajer
Novice
Jun 17, 2011, 7:56 PM
Post #1 of 8
(1263 views)
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I have a 97 chevy venture with 3.4. I was driving to work it stubbled alittle bit then quit. I drove alittle further and when i got to a stop light it stubbled again and then it was done. i replaced my ignition mod. I have fuel and spark. It acts like it wants to start but it wont. I really need help with this.
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zmame
Veteran
/ Moderator
Jun 17, 2011, 9:41 PM
Post #2 of 8
(1250 views)
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get fuel pressure tester from autoparts store loan a tool program and get a actual reading on your fuel pressure and post the results here.
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kajer
Novice
Jun 17, 2011, 10:03 PM
Post #3 of 8
(1248 views)
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i will check that. what should i be looking for as far as pressure.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 18, 2011, 2:59 AM
Post #4 of 8
(1239 views)
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Fuel System Pressure Key On Engine Off 41-47 psi
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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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kajer
Novice
Jun 18, 2011, 7:16 AM
Post #5 of 8
(1231 views)
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fuel pressure 41
(This post was edited by kajer on Jun 18, 2011, 9:07 AM)
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kajer
Novice
Jun 18, 2011, 9:10 AM
Post #6 of 8
(1225 views)
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ok. this is were i am at. fuel pressure is good. it is trying to start but wont. i ran a temp. ground wire from the plate that my ignition modual mounts on to the fender wall. any ideas.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jun 18, 2011, 9:21 AM
Post #7 of 8
(1223 views)
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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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kajer
Novice
Jun 18, 2011, 9:57 AM
Post #8 of 8
(1218 views)
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Could my starter be my problem.
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