Tahoe starts fine after sitting, difficult after that
May 21st, 2012, 12:35 PM
#1
CF Beginner
Thread Starter
Join Date: May 2012
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
Tahoe starts fine after sitting, difficult after that
This has been going on for the past few months. If I leave my 2000 Tahoe Z71 sitting, say, overnight (or any period of about 6-8 hours) it usually starts up just fine. But, if I just run into the grocery store and try to crank it about an hour later, it takes awhile for enough gas to get in it to start; it eventually does but sometimes will take 6-8 seconds to crank.
I replaced the fuel pump just under 2 years ago and thought it could be the injectors, have tried multiple cleaners that have not remedied the problem. Is it something else in the fuel system? Or something else completely?
Thanks in advance.
I replaced the fuel pump just under 2 years ago and thought it could be the injectors, have tried multiple cleaners that have not remedied the problem. Is it something else in the fuel system? Or something else completely?
Thanks in advance.
May 21st, 2012, 4:59 PM
#2
CF Veteran
did you replace the fuel pump relay at the same time you did the pump?
did you replace the entire sending unit or just the pump?
did you replace the entire sending unit or just the pump?
Last edited by RacerX; May 21st, 2012 at 5:01 PM.
Trending Topics
May 23rd, 2012, 3:50 PM
#8
Former Sponsor
The fuel pump module is often the cause, especially with people running tanks low all the time and the pumps overheating. But the fuel pressure regulator can be the problem too!
Often when they go bad, they will leak down after you shut the truck. When the truck is hot, it will be similar to "vapor lock". The initial prime cycle cannot compress all that hot air, so it needs to purge out. Colder air is less dense, so the prime cycle can purge that out much faster.
This can be verified with a fuel pressure test. I would recommend this be done by a qualified repair shop as a hot engine and fuel can be a dangerous mix.
Even if you are going to try this without performing the pressure test, it is a fairly reasonably priced part to try.
2000 Chevrolet Tahoe Fuel Injection Pressure Regulator - Standard Motor Products, Delphi, AC Delco - TheAutoPartsShop - TheAutoPartsShop
Often when they go bad, they will leak down after you shut the truck. When the truck is hot, it will be similar to "vapor lock". The initial prime cycle cannot compress all that hot air, so it needs to purge out. Colder air is less dense, so the prime cycle can purge that out much faster.
This can be verified with a fuel pressure test. I would recommend this be done by a qualified repair shop as a hot engine and fuel can be a dangerous mix.
Even if you are going to try this without performing the pressure test, it is a fairly reasonably priced part to try.
2000 Chevrolet Tahoe Fuel Injection Pressure Regulator - Standard Motor Products, Delphi, AC Delco - TheAutoPartsShop - TheAutoPartsShop
Thread
Thread Starter
Forum
Replies
Last Post
Tucson John68
Silverado & Fullsize Pick-ups
17
November 21st, 2014 7:44 AM
