6.0 starting problems - Pirate4x4.Com : 4x4 and Off-Road Forum

pilothillcrawler · 09-22-2008, 02:30 PM

I got an 02 silverado 2500hd with the 6.0 and am having some starting issues. The motor will turn over and not start the first or second try and then start VERY weakly on the second or third try, usually the third try. It is my wifes truck and as far as I know she has kept up on the fuel filter and such. Should I be able to here the fuel pump turn on when the key is turned on? I know I can on my older 350, but wasn't sure with the newer trucks if they made them quieter. thanks

Bo185 · 09-22-2008, 04:57 PM

Quote:

Originally Posted by pilothillcrawler

I got an 02 silverado 2500hd with the 6.0 and am having some starting issues. The motor will turn over and not start the first or second try and then start VERY weakly on the second or third try, usually the third try. It is my wifes truck and as far as I know she has kept up on the fuel filter and such. Should I be able to here the fuel pump turn on when the key is turned on? I know I can on my older 350, but wasn't sure with the newer trucks if they made them quieter. thanks

You should be able to hear it but you might not hear it. Change the fuel filter if unsure then check the fuel pressure you pump my be on hte way out!

USMCNetzel21 · 09-23-2008, 05:01 AM

Quote:

Originally Posted by Bo185

You should be able to hear it but you might not hear it. Change the fuel filter if unsure then check the fuel pressure you pump my be on hte way out!

X2 on that, sometimes helps also to have two people when doing that as well. Just have your wife turn the key and you listen by the pump to listen if its running.

pilothillcrawler · 09-23-2008, 01:43 PM

thanks will double check on the filter and listen better for the pump.

Bansheestu · 09-24-2008, 03:36 PM

chevy's have a problem with the fuel pump check valve. The system is designed to hold pressure in the line when it is shut off. So when you start the vehicle there will be pressure in the lines already, and therefore start quickly. The check valves go bad all the time, therefore the lines will be empty, or close to empty. So when you go to start the truck you have to fill the fuel lines up to the fuel rail before it will even try to start. Giving you the extended crank. Unfortunately the check valve is not serviced separately and you must purchase the whole fuel pump module to correct the problem. One way to diagnose this is to turn the key from off to on a few times before attempting to crank the engine. This will prime the system, filling the empty fuel lines. Then if it fires right off, you know that is the issue. Of course you can also connect a fuel pressure gauge to the vehicle, and let it sit for a while and see if it maintains pressure. I have seen quite a few that drop off almost immediately.

pilothillcrawler · 09-24-2008, 03:42 PM

yep that sounds like my problem, I had to drive the truck today, and I tried turning the key on and off a few times before starting it and it would fire up when I gave it the first full turn of the key, so to fix this I need to replace the fuel filter, and that will fix the check valve problem.

09-22-2008, 02:30 PM	#1 (permalink)
pilothillcrawler Registered User Join Date: Jul 2006 Member # 76609 Location: Pilot Hill, CA now Woodland, CA; 1 hour further from the con :( Posts: 507	6.0 starting problems I got an 02 silverado 2500hd with the 6.0 and am having some starting issues. The motor will turn over and not start the first or second try and then start VERY weakly on the second or third try, usually the third try. It is my wifes truck and as far as I know she has kept up on the fuel filter and such. Should I be able to here the fuel pump turn on when the key is turned on? I know I can on my older 350, but wasn't sure with the newer trucks if they made them quieter. thanks __________________ YJ on custom frame 350 sm465 twin stick Dana 300, 35 Spline 60's f/r, arbs f/r, hydro, on 42" IROKS

09-23-2008, 01:43 PM	#4 (permalink)
pilothillcrawler Registered User Join Date: Jul 2006 Member # 76609 Location: Pilot Hill, CA now Woodland, CA; 1 hour further from the con :( Posts: 507	thanks will double check on the filter and listen better for the pump. __________________ YJ on custom frame 350 sm465 twin stick Dana 300, 35 Spline 60's f/r, arbs f/r, hydro, on 42" IROKS

09-24-2008, 03:42 PM	#6 (permalink)
pilothillcrawler Registered User Join Date: Jul 2006 Member # 76609 Location: Pilot Hill, CA now Woodland, CA; 1 hour further from the con :( Posts: 507	yep that sounds like my problem, I had to drive the truck today, and I tried turning the key on and off a few times before starting it and it would fire up when I gave it the first full turn of the key, so to fix this I need to replace the fuel filter, and that will fix the check valve problem. __________________ YJ on custom frame 350 sm465 twin stick Dana 300, 35 Spline 60's f/r, arbs f/r, hydro, on 42" IROKS

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

09-24-2008, 03:36 PM	#5 (permalink)
Bansheestu Registered User Join Date: May 2006 Member # 73413 Location: Portland, Oregon Posts: 866	chevy's have a problem with the fuel pump check valve. The system is designed to hold pressure in the line when it is shut off. So when you start the vehicle there will be pressure in the lines already, and therefore start quickly. The check valves go bad all the time, therefore the lines will be empty, or close to empty. So when you go to start the truck you have to fill the fuel lines up to the fuel rail before it will even try to start. Giving you the extended crank. Unfortunately the check valve is not serviced separately and you must purchase the whole fuel pump module to correct the problem. One way to diagnose this is to turn the key from off to on a few times before attempting to crank the engine. This will prime the system, filling the empty fuel lines. Then if it fires right off, you know that is the issue. Of course you can also connect a fuel pressure gauge to the vehicle, and let it sit for a while and see if it maintains pressure. I have seen quite a few that drop off almost immediately.