Ok, i have a 1998 Chevrolet Blazer LS... imfomus 4.3 and the 4l60-e trans. combo.

I just replaced the following parts,
Plugs,Wires,Cap,Rotor button, radiator, engine oil, & all new coolant,
Did a compression test
#1- 145PSI
#2- 150PSI
#3- 147PSI
#4- 160PSI
#5- 158PSI
#6- 160PSI

Cooling system pressure test in good condition,
Engine oil pressure is over half way up the gauge,
Fuel system pressure tested out in good condition no problems.

Ok now for the problem.
I have the engine light on and the code is
P0118: Engine Coolant Temperature Sensor High Voltage Input

It is stumbling/Back Firing/Shaking/Low RPMS & even wants to die out but it dont.

Cant anyone help me on this matter? sorry for listing everything but i wanted to let you guys know what it is.

 

What brand of parts did you use?
What is the fuel pressure, key on, engine off, fuel pump running?
Does it remain above 55psi for 10 minutes after the pump shuts off?

Sounds like the cap might not be wired correctly.

 

i really apreciate the help, i had the #1 & #3 spark plug wires crossed at the dist. but i got it all running great and now the intake gaskets are shot... but its alright i am reading around looking for videos/pics/directions i found a set of gaskets that are metal/rubber at advance for $82-83 witch i dont think is to bad in my opinion..


Thank you gents for all of your help, it helpes i was flipping threw my haynes manual and i thought the engine cylinders matched up to the dist but no they didnt.

 

Glad you got it, glad I could help. You just found out where the Haynes manual belongs.... on the shelf at the auto parts store, next to all the other ones GM dealer issue factory shop manuals are the only way to go. A little over 3,000 pages, (also available on CD) covers EVERYTHING on your year, make, & model. Amazon & Ebay have them.