I have a 1998 LT Blazer. That when you get the Engine To running temp so drive it about 20 minutes it starts wanting to stall but if you give it gas it will power through it until you let off gas, when it dose this the rpms are jumping from the engine and it all most feels like it’s dragging. No codes come up on the computer and no check engine light on dash. Any ideas on where I should do to fix this problem before winter hits. I need help

 

I am sorry: "when it dose this the rpms are jumping from the engine and it all most feels like it’s dragging. " I don't understand what you are saying could you reword it ? Are we saying the RPM's are increasing than dies down. Is the dragging you speak of; just the engine cutting off? I am thinking this is what you are saying, but not sure. If it is the case I would check fuel pressure, part stores sometime have loaner tools you can borrow. I purchased one on Amazon pretty cheap and fuel pressure was good. If fuel pressure is low perhaps a blocked fuel filter.

 

When the engine gets warmed up the rpm’s will start to go up and down and if you take your foot of the gas pedal it will stall as the rpm’s are going up and down it feels like I’m pulling a trailer loaded with a ton, also when I drive through town it doesn’t want to go 30 mph or 35mph it starts ******* down . Will check pressure for the fuel line and will post the results Thank you for all your help

 

There is a sticky at the top of the second gen forum that has some definitive testing on the fuel system. do that.

 

I tested the fuel pressure and it stays around 50psi. Could it be the EGR

 

That is far from completing the definitive testing in the fuel pressure testing sticky. You're going to have to help us to help you.