i just replaced my fuel filter and now my blazer idles rough. help please? 96 4wd 4dr

 

Did you install it backwards? Kink any lines? Possibly the grud that was in there got disturbed & made it to the fuel lines & to the poppit valves in the spider.
If it's ok then I'd do a fuel pressure leak down test. You can search that out in here for how to do it & the pressures needed.

 

well i desided to take it advanced auto and have them check all the codes thats on it. Was a MAF low frequency and a cyl 5 misfire. I fixed the misfire and runs perfect now. Odd that i showed up like this though o.O

any clue to what low frequency MAF means excatly?

 

Look up Cleaning MAF in here & try that. It's simple but a little delicate.

 

Stevo,just pop off the maf,go buy you some mass airflow cleaner (DO NOT USE ANYTHING ELSE) and spray the precious guts on the inside. Do not scrub. let dry. reinstall and try it out.

 

You can use denatured alchohol as well. Rubbing alchohol is the same thing & cue-tips. Do not use carb cleaner or throttle body cleaner (so I've heard)
I keep a bottle of rubbing alchohol in the blazer with cue-tips just for that because mine see's a lot more air passing through it than a naturally aspirated engine.
Pick it up at a pharmacy, wally world etc.