03 Avalanche replaced fuel pump 2 years ago, fuel pump recently failed again - it was replaced along with the fuel filter.Failed to start four times in the past month w/o pumping the gas pedal?

10

Asked by Jul 28, 2015 at 06:12 PM about the 2003 Chevrolet Avalanche 1500

Question type: Maintenance & Repair

2003 Chevy Avalance with 143K miles - it has been in the shop for two days and they cannot replicate the problem of it not wanting to start without pumping on the gas pedal - would could this be?

3 Answers

67,475

Pumping the gas pedal on a fuel injected engine does absolutely nothing but admit more air to the engine. I'd suspect a bad/dirty IAC (Idle Air Control) valve, or dirty throttle plate. You may have faulty fuel injectors flooding the engine. Check the spark plugs for gasoline fouling. You might want to check the throttle position sensor for proper operation too. HTH. -Jim

10

Good to know - it is kind of habit to try something like pumping the pedal when the engine does not start. Are you saying if we keep trying w/o hitting that pedal - it just might start?

1 of 1 people found this helpful.
67,475

It may. One other thing you can try is "cycle" the ignition key. Turn the key on but don't try to start it. Count to 5. Turn the key off then immediately try to start it. If that works every time, the fuel system is losing pressure. This is a sign of a failing fuel pump. On the other hand, if you think it's flooded, hold the gas pedal to the floor while cranking. This puts the computer in clear flood mode. In clear flood mode fuel delivery is greatly reduced until the engine gets going. HTH. - Jim

Your Answer

Add photo

Related Questions

Avalanche

Looking for a Used Avalanche in your area?

CarGurus has 4,866 nationwide Avalanche listings starting at $1,900.

ZIP:

Search Chevrolet Avalanche Questions

Chevrolet Avalanche Experts

#1 Tom Demyan
Tom Demyan
Reputation 300
#2 David Scott
David Scott
Reputation 160
#3 Oscar Leon
Oscar Leon
Reputation 150
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,773 Great Deals out of 181,200 listings starting at $250
Used Ford F-150
2,055 Great Deals out of 207,336 listings starting at $1,499
Used Chevrolet Tahoe
559 Great Deals out of 31,371 listings starting at $1,500
Used Cadillac Escalade EXT
28 Great Deals out of 710 listings starting at $4,500
Used GMC Sierra 1500
761 Great Deals out of 69,125 listings starting at $1,850
Used Dodge Ram 1500
411 Great Deals out of 10,833 listings starting at $1,400
Used Cadillac Escalade
194 Great Deals out of 10,970 listings starting at $3,200
Used Toyota Tundra
436 Great Deals out of 34,677 listings starting at $2,990
Used Chevrolet Colorado
242 Great Deals out of 24,816 listings starting at $2,499
Used GMC Yukon
382 Great Deals out of 19,299 listings starting at $2,000
Used Chevrolet Camaro
243 Great Deals out of 31,194 listings starting at $369
Used Chevrolet Suburban
299 Great Deals out of 19,514 listings starting at $1,800
Used Toyota Tacoma
476 Great Deals out of 41,590 listings starting at $1,995

Used Cars For Sale

2013 Chevrolet Avalanche For Sale
3 Great Deals out of 413 listings starting at $17,995
2012 Chevrolet Avalanche For Sale
6 Great Deals out of 229 listings starting at $15,499
2011 Chevrolet Avalanche For Sale
13 Great Deals out of 419 listings starting at $8,994
2010 Chevrolet Avalanche For Sale
14 Great Deals out of 271 listings starting at $9,499
2009 Chevrolet Avalanche For Sale
6 Great Deals out of 257 listings starting at $11,797

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.