my 93 blazer has been running horribly for a little while now and i cant seem ti figure it out..it idles alright but when you give it gas it misses real bad and boggs. just dosnt want to go anywhere or do anything. the first thing i was told it was, was a leaking spider and it was so i replaces it and no more leaks, problem was no longer as bad but still there. so i replaces plugs, wires, cap, and rotor, with not much of a change. after that on a test drive the SES light came on and i pulled over and checked and i got a knock sensor code and a MAF\MAP sensor code. i replaces both and again not much of a change but no more SES light. i checked the fuel pressure and that is perfect, checked the TPS, checked and cleaned the IAC valve and air filter. all were good no SES lights and still getting the hesitation. almost like spark is dieing when more and more when the throttle is depressed..any ideas because im about out...

 

sounds like the exact problem im having except im not showing a code for the knock snesor

 

Well the code is gone now n the know sensor was completely shot the terminal was cracked... And it dose seem to run worse the warmer it gets..

 

I'm still trying to figure out my issue. I'm starting to think now it may be electrical. Just having to confirm it is a pain.

 

post fuel test results (key on,and after 10 min of sitting holding pressure).

 

With key on not running is 10psi and running for 10 minutes stays steady at 50 psi at idle and rev and driving and the chilton manual says it should be around 50-55 psi