hey all

i have a 95 4.3 4x4 auto blazer with 140k and some issues.

background
i bought it with a bad frost plug in the rear of the motor. changed it out (PITA) and havent had an issue with the temp at all. i also removed the cat which was clogged. the truck is stock minus the removed cat and a flowmaster muffler.

1) high idle, it idles @1500-2k in park/N at all times and about 1300 in gear. i have done full tune up(plugs, wires, cap, rotor,sefoam) still high idle,so i replaced the IAC. still no change. no vaccum leaks that i know of.

2) the tranny shifts @ 3200rpm in any gear @ and throttle possion(even WOT) and it will not down shift. fluid is fine.

any info would help
thanks
shane

 

Get it scanned to see if the TPS is faulty or needs to be recalibrated/adjusted? Since the cat was clogged did you check other systems ie: EGR O2Sensors???

Before spending/throwing a lot of money at the problem you should really get the PCM scanned for possible trouble codes that may be stored in the computer but have not setoff the MIL/SES light....