ok guys i have a full size 89 blazer. i just had the cat replaced and muffler. i am still having issue with loss of power. what else is there i can check or do myself. i am doing a tranny service today. when i get on the gas it acts like it wants to go put doenst have all the power. there is also a loud fan noise when the rpms get up high. any help would be awsome

 

When was the last time you did a tune up? Has the timing been verified?

Have you replaced the fuel filter?

The fan noise is likely caused by a fan clutch that has failed in the full on mode.

 

i just bought it last week so i dont know when the last tune up was. i just did a tranny service on it. the timeing is dead on. had it check last week when i had the smog done. i have not replaced the fuel filter. thats a cheap way to find go. thanks ill check it. as for the fan clutch i am lost. how do i check that or do i have to replace the hole fan itself. thanks for the help.

 

When the engine is cold, the fan should spin with a little resistance. If it is rigid, then the clutch is locked up.