1998 Chevrolet Silverado Chevy Vortec 5 7 Fuel Staved New

Do you have a multimeter to do some testing?

In the inside fuse box the fuse labeled aux pwr fuse number see if its blown its a 25 amp fuse?

yes i have a multimeter...thanks for responding...pete...

no fuse in slot #7....

Yeah number 7 fuse 25 amp put a fuse in and see if the scan tool powers up and check for codes.

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???

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.

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....

oh...no live data on our code reader...sorry....what's next??? thanks-again...Pete....

What is the actual fuel pressure?If you haven't checked it yet rent a pressure gauge at auto zone and check it.

hi there....58 psi....still wont start...thanks again...fuel pressure regulator???

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?

Also you have made sure you have a nice blue spark?

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...

oh and it has fresh new gas....and i flushed the fuel lines with it...

oh code does not return...no error codes at all....and i have reset pcm with code reader...

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.

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...

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...

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.

thanks i'll go and try this right now...but iam still wondering why no fuel is returning to the fuel tank..in the return line...

Let's see if the injectors are working which sounds like there not with the correct fuel pressure and starts on a prime.

yes...it does start with a prime...but does not continue to run...what do you think we could try next..thanks-alot...pete...

Let's start with checking the circuit like I asked you too.

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