99 1500 Hessitation

99silverboy · 12-13-2005, 09:57 PM

I have a 99 chevy silverado 5.7 that will sometimes fall flat on ots face when taking off. Seems the harder you get on it the worse it gets, until you let off and peddle it a little bit then it will take off. seems to be happening most when I turn say out of a parking lot on to roadway. there are no codes, no check engine light, no idea. I have been kicking around ideas that it could be bad gas, but its been going on now for about 3000 miles. In which time I ran it completely out of fuel. thought maybe its a sensor like o2 or something but figured there would be a code if it was. I even have considered a catalytic converter being plugged or a fuel pump problem but I dont want to go changing a bunch of things and not solve the problem. Any help would be greatly appreciated.

72'CaminoKid · 12-14-2005, 02:01 PM

i've had the same problem with mine.... mine mainly does it when i get on it too hard.... i'm guessin its just that the engine gets goin so fast so quick, the computer dont have time to tell it to shift

99silverboy · 12-15-2005, 08:07 PM

any one else have any ideas

DodgeChick · 12-15-2005, 09:31 PM

Another thought is when were your sparkplugs last changed? I know mine was doing something similiar and when I had the plugs changed it solved that problem flat.

Itstali25 · 12-15-2005, 10:09 PM

well could be fuel or spark.....which could be the culprit not sure........so are you saying its worse when your turning??

72'CaminoKid · 12-16-2005, 01:41 PM

i'm talkin bout the tranny..... like, it dont shift until i let off

99silverboy · 12-17-2005, 10:05 AM

it seems to mainly happen when turning out of a parking lot after sitting a bit.

99silverboy · 12-17-2005, 10:07 AM

it will happen when driving strait also but seems to be most common when turning right

99silverboy · 12-17-2005, 10:13 AM

my problem is more on initial takeoff. Truck will start to accelerate then falls off sharply as if it was on old carburated model that loaded up and then takes off like a rocket once cleaned out.

chevyguy · 12-17-2005, 10:29 AM

Sounds like a fuel /air delivery problem, do you have a cold air intyake or any other mods on it?

12-13-2005, 09:57 PM	#1
99silverboy Full Member Join Date: Dec 2005 Location: KS Posts: 13	99 1500 Hessitation I have a 99 chevy silverado 5.7 that will sometimes fall flat on ots face when taking off. Seems the harder you get on it the worse it gets, until you let off and peddle it a little bit then it will take off. seems to be happening most when I turn say out of a parking lot on to roadway. there are no codes, no check engine light, no idea. I have been kicking around ideas that it could be bad gas, but its been going on now for about 3000 miles. In which time I ran it completely out of fuel. thought maybe its a sensor like o2 or something but figured there would be a code if it was. I even have considered a catalytic converter being plugged or a fuel pump problem but I dont want to go changing a bunch of things and not solve the problem. Any help would be greatly appreciated.

12-14-2005, 02:01 PM	#2
72'CaminoKid Senior Member Join Date: Jun 2005 Posts: 2,329	i've had the same problem with mine.... mine mainly does it when i get on it too hard.... i'm guessin its just that the engine gets goin so fast so quick, the computer dont have time to tell it to shift __________________ 99 suburban xlt 96 silverado 91 wrangler (my baby ) 08 Honday shadow 750 (my mistress)

12-15-2005, 09:31 PM	#4
DodgeChick Senior Member++ Join Date: Jul 2004 Location: Albany, NY Posts: 850	Another thought is when were your sparkplugs last changed? I know mine was doing something similiar and when I had the plugs changed it solved that problem flat. __________________ 2002 Patriot Blue Ram 1500 4x4 in the process of some mods ***Voted Best Truck on HGS*** Silly boys!! Trucks are for girls!!! "Grab Life By The Horns"

12-15-2005, 10:09 PM	#5
Itstali25 Senior Member Join Date: Jul 2004 Location: Southern Missouri Posts: 708	well could be fuel or spark.....which could be the culprit not sure........so are you saying its worse when your turning?? __________________ http://www.cardomain.com/ride/644045 Trucks are just cars when they grow up!!! If your gunna get a truck....Get a TRUCK!!

12-16-2005, 01:41 PM	#6
72'CaminoKid Senior Member Join Date: Jun 2005 Posts: 2,329	i'm talkin bout the tranny..... like, it dont shift until i let off __________________ 99 suburban xlt 96 silverado 91 wrangler (my baby ) 08 Honday shadow 750 (my mistress)

12-15-2005, 08:07 PM	#3
99silverboy Full Member Join Date: Dec 2005 Location: KS Posts: 13	any one else have any ideas

12-17-2005, 10:05 AM	#7
99silverboy Full Member Join Date: Dec 2005 Location: KS Posts: 13	it seems to mainly happen when turning out of a parking lot after sitting a bit.

12-17-2005, 10:07 AM	#8
99silverboy Full Member Join Date: Dec 2005 Location: KS Posts: 13	it will happen when driving strait also but seems to be most common when turning right

12-17-2005, 10:13 AM	#9
99silverboy Full Member Join Date: Dec 2005 Location: KS Posts: 13	my problem is more on initial takeoff. Truck will start to accelerate then falls off sharply as if it was on old carburated model that loaded up and then takes off like a rocket once cleaned out.

12-17-2005, 10:29 AM	#10
chevyguy Senior Member Join Date: Sep 2005 Location: ALABAMA Posts: 3,160	Sounds like a fuel /air delivery problem, do you have a cold air intyake or any other mods on it? __________________ When i die, i dont want to walk gracefully thu the pearly gates and turn in a unused body. i want to go sliding thru sideways and turn in a body that has been completely used up.

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