I have a 1995 chevy blazer 4wd...I was having troubles with it running and starting I couldent figure it out so I tore it down...it now has rebuilt heads, rebuilt upper and lower intake manifolds, new head, exhaust, and intake gaskets, new spider injectors, fuel hose repair kit, and fuel filter. A new distributer, cap and rotor, plugs and wires, oil pressure switch, coolant temp sensor, air filter, deleted the egr and a few other things...it now starts awesome but has a miss and a very high idle that dident happen until I drove it a few miles...I currently have the vacuum system tore apart looking for leaks, and im dead in the water I cannot figure out what my problem is and neither can anyone I have talked to....has anyone had this similar problem?

 

I was told to check out my IAC

 

Check your TPS. I have an intermitent poor connection between the TPS and the harness connector. Not sure what to do about it just yet but at least I know what the problem is. Sounds just like your issue. Stick with the troubleshooting and the answer will eventually turn up.

 

post actual fuel pressure results at key on,and pressure after its set for 10 min.