1994 Chevy Blazer 94 s10 blazer 4x4 4.3lL vortec mystery pr

230,000 MILES • 6 CYL • 4WD • AUTOMATIC
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DANIELS94BLAZER
  • MEMBER
  • 5 POSTS
my 94 s10 blazer runs with earritic idle and acts like its missing real bad for a few hours then i shut it off for overnight and it starts abd runs real bad for about 10 mins then dies will start back up but dies after a few mins i have replaced iac map tps air charge coolant temp sending o2 sensors distributer cap button control module plugs wires the distributer computer spider injector fuel filter timing chain coil egr is back plated and unplugged catilic converter has been removed the vavle timing has been checked fuel pressure is 60psi when the key is in the on position 54 when running has been checked 12 times cylinder compression is 130 psi in all cylinder has been checked 3 diffrent times ingition timing has been set but it still acts like its getting a bad mixture or out of time and fouls spark plugs out please help im out of ideals and suggestions would be greatly appreciated
Mar 17, 2010 at 3:09 PM
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RHALL77
  • ✓Experienced Mechanic
  • 3,361 POSTS
are the tubes for the injector in the correct positions? are you sure you dont have a spark plug wire crossed? your fuel pressure maybe right but do you have enough volume? try running the vehicle with it in drive holding the brake and loading up the engine. while you are doing this have someone release the pressure on the fuel pressure gauge and see if it dies right away. if it does, its a good indication that it needs a fuel pump
Mar 18, 2010 at 2:27 AM
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