Hello ...i own a 2003 chevy blazer xtreme. 4.3 Vortech
Heres my problem the truck bogs down around 2000 rpm and has no power
This is a list of the parts i have replaced
1. Cataylic converter
2. Tps
3. New plugs
4. Cap and Rotor
5. Fuel filter
6. Removed injector spider and cleaned injectors
7. New fuel pressure regulator
8. I did replace maf with one from junkyard ? maybe this could be problem
it does throw a P0101 after running for awhile.
Any help would be appriciated Thanks

 

First thing you should have done was a fuel system leak down test

 

Checked fuel pressure ran 60lbs at idle could not go to wot but with alittle throttle i was getting 62-64. Shut engine down and pressure held

 

https://blazerforum.com/forum/2nd-ge...eakdown-88305/

If you read through this article from Captain Hook and then test the system properly, you will probably get some better suggestions. I'm not saying the problem is or is not the fuel pump, but it cannot be ruled out until tested properly. Also, were the plugs, cap and rotor AC Delco? I doubt that those items are the cause of the problem, but will most likely cause you more problems in the future if they are not AC Delco. Just out of curiousity, if you replaced the plugs, cap and rotor - why not change the plug wires? The wires don't have to be AC Delco though. The part numbers are floating around the forum if you need them....

 

Check the pressure the right way. Betting the pump is the problem