1985 S-10 (carb) v6 Auto problem

[TexasOutlaw87Cummins]

Hey guys I'm posting this for a friend of mine . He's got a 1985 v6 2.8 carb . We changed the plugs wires an cap and rotor . An still kinda idles ruff like its missing . I haven't but a vacume gauge on it yet . But seems that it would pull 17 steady needle , doesn't act like any thing mechanical is wrong at idle . When her drives it , the engine falls flat on its face till high RPMS then it runs really good , that's why I kinda think its advance or timing . How does there
Inf advance on these trucks work ? What esle would cause that ? I'd really appreciate the help , oh and it's got a check engine light , how do I check it , thanks !!!

 

[Jims86]

Hey guys I'm posting this for a friend of mine . He's got a 1985 v6 2.8 carb . We changed the plugs wires an cap and rotor . An still kinda idles ruff like its missing . I haven't but a vacume gauge on it yet . But seems that it would pull 17 steady needle , doesn't act like any thing mechanical is wrong at idle . When her drives it , the engine falls flat on its face till high RPMS then it runs really good , that's why I kinda think its advance or timing . How does there
Inf advance on these trucks work ? What esle would cause that ? I'd really appreciate the help , oh and it's got a check engine light , how do I check it , thanks !!!

You still in Cali?
If that has the ECM controlled Dual jet carb, the Tps might be bad if its not advancing. try putting a timing light on it to confirm. check for a loose throttle shaft and a good shot from the accell pump as well.
Fuel filter?
Does it catch up at WOT? the ecm only controls stuff to part throttle, the rest is old fashioned carb.

 

[TexasOutlaw87Cummins]

Yea like at WOT it will catch up like once you roll the pedal so far it will run good . Idle to that point no power runs like crap . A computer carb ? Wow haha ok ill look at the Tps has a check engine light also but don't know the paper clip trick on these . Yep changed the fuel filter . All the tune up stuff is done but just couldn't figure out why it runs run at idle and no power till WOT

 

[Jims86]

Yea like at WOT it will catch up like once you roll the pedal so far it will run good . Idle to that point no power runs like crap . A computer carb ? Wow haha ok ill look at the Tps has a check engine light also but don't know the paper clip trick on these . Yep changed the fuel filter . All the tune up stuff is done but just couldn't figure out why it runs run at idle and no power till WOT

Treat it as a normal carburetor...sounds like fuel may blocked somewhere. maye pull it apart and clean it real good...maybe do a full rebuild, and take the base to have bushings installed, or call SMI carbs and see if the can do it.
Paperclip trick is the same. jump a and b together, switch the key on(dont start) and watch the light.
Have you checked for vac leaks too?