1998 Chevy vortec 5

Tiny
PETERSYSTO
  • 1998 CHEVROLET SILVERADO

1998 chevy vortec 5.7. Fuel staved. New pump, filter. Getting gas to manifold under pressure. Will start with gas down throttle body. But not staying running. Also can't get code reader to work, what fuse powers up that circiut? Thank-you. Pete.

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Sunday, February 17th, 2013 AT 1:18 AM

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Tiny
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Do you have a multimeter to do some testing?

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Sunday, February 17th, 2013 AT 2:57 AM
Tiny
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In the inside fuse box the fuse labeled aux pwr fuse number see if its blown its a 25 amp fuse?

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Sunday, February 17th, 2013 AT 3:05 AM
Tiny
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Yes I have a multimeter. Thanks for responding. Pete.

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Sunday, February 17th, 2013 AT 3:18 AM
Tiny
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No fuse in slot #7.

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Sunday, February 17th, 2013 AT 3:42 AM
Tiny
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Yeah number 7 fuse 25 amp put a fuse in and see if the scan tool powers up and check for codes.

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Sunday, February 17th, 2013 AT 5:54 AM
Tiny
PETERSYSTO
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Code tool works now. ERROR p0-108. Map senser. Can we trouble shoot this. And where is it located? This was the only error code. How do you know if the pcm is working properly?

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Sunday, February 17th, 2013 AT 2:12 PM
Tiny
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Most likely the pcm is good that would be the last thing we would suspect with that code. Does your scan tool display live engine data or just read codes?If it only reads codes its going to be hard to trouble shoot the code.

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Sunday, February 17th, 2013 AT 3:38 PM
Tiny
PETERSYSTO
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First off. Thank-you so much for responding. Our code reader is a Innova 3030 canobd2 car reader. Should I be cranking the engine while code reader is reading? Oh just so you know. Fuel is not returning to tank. Could this be a sign of a bad fuel pressure regulator? How would you troubleshoot one? I appreciate any thoughts or ideas. You've been very helpful.

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Sunday, February 17th, 2013 AT 6:43 PM
Tiny
PETERSYSTO
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Oh. No live data on our code reader. Sorry. What's next? Thanks-again. Pete.

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Sunday, February 17th, 2013 AT 6:45 PM
Tiny
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What is the actual fuel pressure?If you haven't checked it yet rent a pressure gauge at auto zone and check it.

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Sunday, February 17th, 2013 AT 10:13 PM
Tiny
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Hi there.58 psi. Still wont start. Thanks again. Fuel pressure regulator?

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Sunday, February 17th, 2013 AT 10:34 PM
Tiny
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Fuel pressure sounds good if you clear the codes does the P0108 come back?Also will it start if you prime it with carb spray?

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Monday, February 18th, 2013 AT 2:42 AM
Tiny
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Also you have made sure you have a nice blue spark?

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Monday, February 18th, 2013 AT 2:51 AM
Tiny
PETERSYSTO
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Great spark and will start with carb spray. But will not stay running. Something perhaps strange. No fuel is being returned to fuel tank? Engine is still fuel staved. What do you think? Thank much. Pete.

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Monday, February 18th, 2013 AT 2:57 AM
Tiny
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Oh and it has fresh new gas. And I flushed the fuel lines with it.

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Monday, February 18th, 2013 AT 2:59 AM
Tiny
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Oh code does not return. No error codes at all. And I have reset pcm with code reader.

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Monday, February 18th, 2013 AT 3:01 AM
Tiny
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See if you have constant power to the injectors with the key in the run position? Also if you have. A flashing ground to the injectors while cranking?Use a computer safe test light.

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Monday, February 18th, 2013 AT 3:30 AM
Tiny
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How do I check for flashing ground. And how do I check for constant power to injectors. Thanks much.I think we're getting close. Pete.

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Monday, February 18th, 2013 AT 3:36 AM
Tiny
PETERSYSTO
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Good morning. Thanks for all the help so far. How can I make another donation? And could you please respond to the last question about flashing grounds and constant power to the injectors. Maybe there's a info link online. Thanks-again. Pete.

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Monday, February 18th, 2013 AT 3:17 PM
Tiny
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Alright key in the run position the pink wires to the injectors should have a constant power the other wires should have a plusing ground while cranking.I will find out how you can make another donation.

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Monday, February 18th, 2013 AT 8:47 PM

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