ok thank u very much. so it is a possibilty that the cmp may be acting up again. and getting some new heat grease behind my icm would be a good idea too right? thanks alot for your good info!!! and sorry about not editing
now that i think of it it does seem to be worse once the truck is warmed up after going down the highway. blazer has over 275,000 miles and i belive icm and coil all original

 

No problem. Try the ICM grease and see how it goes.

 

thanks ill try that tonight. did u see my edit on how i think it does get worse once warmed up? but the sluggish start seems to be timming like i need to twist the cap just a tad. but then it makes me think cmp cause when i removed my cap and installed new one the starter was not sluggish? this truck is crazy lol.

 

well i tried the grease and still the same. i did notice when i had my dist. cap off that the rotor had play from side to side and up and down. is that normal?

 

Some play is normal. There shouldn't be much up/down movement.

 

ok so let me ask u this. how come when i changed my CMP under dizzy cap the first time my blazer would start right up no problems at all then 2 days later right back to the sluggish start and missing out?

 

Could be a wiring fault... Intermittent problems are never fun to diagnose.

So hypothetically, the replacement of the CMP sensor would require the disconnection of the wiring which will move the wires around in the harness. This movement could have temporarily allowed for a broken wire to once again pass current properly, allowing the truck to run.

 

ok. it seems i have about as much play up and down in dizzy as side to side.

 

You could pull the distributor and inspect the gear on the bottom...

 

whats the easiest way to get that 9/16 bolt out? can i just remove cap and possibly get a 9/16 socket and swivel?