I got a 98 blazer 4.3 5 speed truck runs good can really haul. After driving about 30-40 mins if u give heavy throttle truck jurks real bad and won't accelerate. Any help would be nice and thank you for any you can give.

 

Ignition coil may be bad, had same problem on older 89 S10 once, only when hot

or a fuel pump going bad, not enough fuel

 

Ok thank you I'll try those the four wheel shop told me that they think it might be the injectors. I just don't have much money to work with right now but thank you