i have a 95 blazer 4door. it has a rough start, and sometimes takes a bit to start up.

any ideas why it runs weird?

 

Probabaly a leaking fuel line under the intake plenum and/or a shot fpr,possibly you may need the whole spider if it is original,mine was doing the same thing after doing a full tune up,so check the plugs and other simple stuff first then you may want to check the fuel lines and spider.Mine got progressively worse to the point that it would take appox 15 sec cranking to start the motor and when it did start there was black smoke coming out of the exhuast due to the fuel dumping into the engine.

 

alright, thanks alot.

 

i've got a 94 and had it scoped today,we took off egr valve blew it out with air hose ,tapped on a rag so we wouldnt damage the gasket,a lot of carbon fell out,put it back on and she ran perfect,was idling rough and stalling at stop signs,and hard to restart after warmed up and sucking gas

 

yeah, i checked the egr valve, it was clean. that was my first guess, still no fix.