six month problem


richard43
03-13-2010, 07:17 AM
I have a 95 chevy s10 blazer 4.3 cpi it is running rich i have change the cpi the nut kit erg temp sending sensor new converter and muffler plugs wire cap rotor pick up coil coil i will put new plugs in it and two miles down the road they are carbon up not just three on one side or the other it is all six pluges it has me stumped any suggestions please help getting ready to junk.

old_master
03-14-2010, 08:58 PM
Check fuel pressure and leakdown. 1995 CMFI system: Key on, engine off, fuel pump running: Fuel pressure must be 58psi to 64psi and must remain above 53psi for 3 to 5 minutes after the pump shuts off.

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