motor runnin rough. Any Help?

[larryslamps]

87 k5 350 tbi 700R4 64K orig. miles. My k5 runs smooth most of the time. Ive only had it for 2 months or so now. When I start it up in the morning it acts like it wants to sputter out and die, give it gas it runs fine. On the highway sometimes, very rarely, it will just cut out, engine doesn't shut off just no pedal response or forward momentum, then it kicks back in. Any ideas?
I'm thinking maybe fuel filter, I've gone over the tbi unit several times with carb cleaner. Sparkplugs maybe, dispr. cap? Point me in the right direction if you can. Thanks.

 

[bronc3buster842001]

check the throttle poistin sensor my buddy k-5 done the same thing changed the tps and it runs great

 

[larryslamps]

Can I pick that up at Autozone or is is a LMC part? Price? Thanks for your help.

 

[bronc3buster842001]

should be able to get it at autozone i forgot how much it was i think arount 20-30 bucks or so

 

[larryslamps]

I just checked LMC and they dont carry it, will check autozone tomorrow.

 

[larryslamps]

I found the tps on advance auto parts site, where exactly would this be located at on the blazer?

 

[bronc3buster842001]

on the left side of the throtle body if lookin from the front its got 3 wires runnin to it