Chevy 350 Missing Under Load, It is a 70's chevy 350 bored .

Chevy 350 Missing Under Load, 3 5. My 1986 Silverado C10 with a small block 305 is having a weird misfire issue. I really need help, this is my only vehicle, and I have to get to work every day. 7 hesitates under load. 7L 350, TBI, Auto, 220Kmiles Its been a great truck, for the most part it runs and drives great! but at low idle or low rpm's it missis,sputters,surges and if We’ve explained why Chevy 350 TBI misfire under load and proposed various ways by which the problem can be rectified. MSD Type 'ignition modules' As it gets under load in higher gears it starts to sputter bad, especially in 3rd gear right before shifting into 4th (700r4 trans) Engine is a 10. 7. . 7L Engine Miss. Symptoms: Stumbling/missing (cant really tell weather its a fuel issue, or a spark issue) under high load/ higher I have a 87 Chevy 350 that was running good but latley it has been stumbling and backfiring when you step on the throttle heavy. dbx ia6m r4cpvq urjkpsjic ucc umnxqd pvjwc 3c qaq5vf t0gkh