If I read your thread correctly, you still haven't tested the CTS, TPS, MAP, or ICM. My money would be on your MAP-- unplug it and see. You can test CTS by measuring resistance, TPS is smooth voltage curve, ICM=>parts store.

Then maybe rig up a fuel pressure gauge, just to see if it really is starving for fuel..

Where is the timing with ESC unplugged engine warm? (everybody says use bypass wire at firewall, but my truck doesn't have one, so I unplug ESC harness =). Biggest valley is 0*. The other peaks counterclockwise would be advanced

After all those are determined good, maybe you can justify trying a junkyard computer from another 350tbi/700r4 vehicle (they're common). Try car-part.com. If you're nice they might let you try it out before you buy it or give you some time to return it.

here is the test for cts using multimeter

212f 177 ohms
194f 241
176f 332
158f 467
140f 667
122f 973
113f 1188 ohms
104f 1459
95f 1802
86f 2238
77f 2796
68f 3520
59f 4450
50f 5670
41f 7280
32f 9420
23f 12300 ohms
14f 16180
5f 21450
-4f 28680

 

Thanks everyone for the help been busy testing , My flow chart started with the EGR than the MAP sensor. They both tested good Than the TPS and the IAC none tested Faulty, the only test that was bad was the Knock sensor it was retarding the timing , i am going to go this week to look for a computer ill keep everyone posted , Thanks again.

 

Back to the same problem, got a known good computer and installed it .About a 1/4 mile down the road same problem. IT shows the same problems in all the components i replaced could it be something completely different? I have not replaced the KS but should i go back to looking at fuel problem.

 

Fuel is another possibility. You will need to install a t-fitting on the fuel supply line at the back of the throttle body to then be able to install a fuel pressure gauge.

 

I want to thank all of you for help on the blazer, every ones info helped me to test all the sensors. The result were all the sensors were in speck and tested good.The end solution was a fuel problem!!!! After testing fuel pressure to be good i had almost run out of things to check , then sitting in class this week my instructor was talking about fuel pumps and filters when he said a clogged strainer on the pump will cause a intermittent problem where the vehicle will run ok for a few min then it will start to stall, then if you turn the key of and restart it will run ok again then stall out. so with that info, when i had replaced the pump the auto parts store didn't have a new strainer for the pump so we reused the old one( it looked ok at the time) so i dropped the tank and looked inside and floating in side was the strainer all broken up , wasn't attached to the pump i replaced the strainer with a new one and sure enough the blazer runs great!!!!!! All of the problems came down to a 10 dollar part, the testing following the flow chart gave me a better understanding of the blazer emissions and electrical but getting the rite parts and not short cutting could have avoided a lot of time and frustration so lesson learned.Any having this same problem hope this info will help. Thanks again