Hesitation/Surging

Mich85 · 08-10-2008, 03:38 PM

Hi,
I just bought a truck around 4 weeks ago, it is a 1990 c/1500 silverado with a 5.7 liter 350 small block. It has been running great up until last week. I slowed down off the highway going 60 mph and onto a street of 25 mph when I let go of the gas my started to surge like I was pushing on the gas. It has been doing this for the past 5 days now. It also has started to hesitate. sometimes when I go to pass someone it does not get the power it should. Here is what I have done to the truck so far.
New OEM Spark plugs
New Spark plug wires
New PCV Valve
New Oil
New Transmission fluid
New coolant
I was going to install a new fuel filter but the lines are very rusty on mine and I am afraid of breaking them. Anyways ideas are welcome. I have a few but before I go spending money I would rather spend money on the actual problem it's a great truck 100,000 miles on it.

leolkfrm · 08-10-2008, 03:44 PM

Welcome to the forum
Go with the fuel filter and if need be replace the fuel lines..or splice if needed. If you use any rubber hose make sure its high pressure with smooth clamps not ring clamps

Mich85 · 08-10-2008, 06:50 PM

Quote:

Originally Posted by leolkfrm

Welcome to the forum
Go with the fuel filter and if need be replace the fuel lines..or splice if needed. If you use any rubber hose make sure its high pressure with smooth clamps not ring clamps

Hey things seem to be running better now I took it for a drive and so far things are ok. I will repost if I have further questions thank you very much

Hamneggs · 08-12-2008, 04:04 PM

My truck had same symptoms.

Believe it or not, it was a loose gas cap.

08-10-2008, 03:38 PM	#1
Mich85 Junior Member Join Date: Aug 2008 Posts: 4	Hesitation/Surging Hi, I just bought a truck around 4 weeks ago, it is a 1990 c/1500 silverado with a 5.7 liter 350 small block. It has been running great up until last week. I slowed down off the highway going 60 mph and onto a street of 25 mph when I let go of the gas my started to surge like I was pushing on the gas. It has been doing this for the past 5 days now. It also has started to hesitate. sometimes when I go to pass someone it does not get the power it should. Here is what I have done to the truck so far. New OEM Spark plugs New Spark plug wires New PCV Valve New Oil New Transmission fluid New coolant I was going to install a new fuel filter but the lines are very rusty on mine and I am afraid of breaking them. Anyways ideas are welcome. I have a few but before I go spending money I would rather spend money on the actual problem it's a great truck 100,000 miles on it.

08-12-2008, 04:04 PM	#4
Hamneggs Full Member Join Date: Jul 2008 Location: Columbus, IN Posts: 11	My truck had same symptoms. Believe it or not, it was a loose gas cap. __________________ 1998 Chevy C1500 Silverado 1970 Mercury Cougar XR7 (Project)

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08-10-2008, 03:44 PM	#2
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 1,074	Welcome to the forum Go with the fuel filter and if need be replace the fuel lines..or splice if needed. If you use any rubber hose make sure its high pressure with smooth clamps not ring clamps