6.0L LQ4 Fuel injection - Lateral-g Forums

bowtie_nut · #1 02-10-2009, 05:23 PM

Okay fuel injection guys I have a question. I have a 99 silverado with a 6.0L factory engine. It has problems starting. The engine sounds like it is starting so I let off the ignition and it dies. Some times it will start and run fine, then I shut it off and try it again and it won't start. The check engine light never comes on at any time. I have checked the fuel regulator on the fuel rail and cleaned around the throttle body with carb cleaner. Does anyone have any ideas?

youthpastor · #2 02-10-2009, 05:36 PM

fuel pressure test? spray some carb cleaner in t-body to see if it starts- if i had to guess- fuel pump- pressure drop will cause hard - no start especially cold- if it is put an A/C Delco pump in it- not aftermarket- my 2 cents- Chris

bowtie_nut · #3 02-10-2009, 05:39 PM

when I take the intake ductwork off of the throttle body the engine dies, is this normal?

youthpastor · #4 02-10-2009, 05:43 PM

Quote:

Originally Posted by bowtie_nut

when I take the intake ductwork off of the throttle body the engine dies, is this normal?

cant do that- has to run through maf sensor to stay running- i thought it wouldnt start??

bowtie_nut · #5 02-10-2009, 05:45 PM

it will start every once and a while. Once it is running it runs fine. It is just a matter of getting it to start

youthpastor · #6 02-10-2009, 05:50 PM

how old is the fuel filter?? sounds like the pump is weak- hard to start cold??