I have a 2000 Blazer, and have been having acceleration problems for several months. When I first start it up and press down on the gas it just chugs and doesn't want to go. After about 30 seconds or so acceleration returns and I don't have any problems. Also, if I start it and run it for about 30 seconds it will run fine.

I replaced the fuel filter awhile ago but that didn't help. The fuel pump went out about a month ago and when I got it replaced I hoped that it would fix the problem, but no luck. I put in some STP a few times, but that didn't help. I got some Sea Foam as well but that didn't work either.

Any ideas?

 

when was your last tune up? i hope you atleast changed the plugs after you did the seafoam, but if not i would suggest a full tune up.

 

I just put in the seafoam last week and the gas tank is nearing empty without improvement. Do you think changing the plugs will fix the problem? Whatever the problem is, I can't figure out why letting the engine run for a short while would make a difference.

 

doing a full tune up sure wont hurt things

 

Ok, got a full tune up, replaced plugs, replaced fuel filter, etc. No improvement whatsoever. Any other thoughts or ideas?