Willie_Rae
Newbie
I'm new to this forum, I have a 88 K2500 silverado with the 350 TBI. A few years ago, the motor was having trouble so a mechanic did a bunch of rigging to the TBI system. It was rigged to run, many sensors/necessary stuff is either unplugged, or rigged to run. It ran OK but it was awful on gas, not a lot of power, you could definitely tell it was not running like it should.
The motor was rebuilt not many miles ago. Bored .30 over, flat-top pistons, and supposedly a small cam but I'm not so sure if it has an aftermarket cam in it (no lope at all).
The timing was so advanced premium gas was a must and after that it could use a booster as well. I tried to set the base timing as it should be, and the motor bucks every time I spin it over, slowly stripping out the new ring gear. I have been told to swap from TBI to a Holley 600 4 barrel/HEI dizzy but I would rather spend the money and correctly wire the TBI for the reliability (cold weather starting, MPG, etc) than do the carb swap seeing all the parts and rigging necessary to do said swap.
If it would be better I am willing to carb swap but it seems to me it would be better to rewire the stock TBI and regain the reliability of the TBI system and not have lights on in the dash (pet peeve) than it would be to swap to a carburetor setup. The only reason I'm considering this is for the ease of cam choice, being the computer doesn't have to accept it so I could go as big as I wanted, no worries.
Any ideas on what causes the bucking? We set the timing and as long as the dizzy wasn't tightened down, it wouldn't buck. But when it was tightened, it started to buck and strip the gear. I need this fixed ASAP, seeing as this is my only mud/trail truck.
The motor was rebuilt not many miles ago. Bored .30 over, flat-top pistons, and supposedly a small cam but I'm not so sure if it has an aftermarket cam in it (no lope at all).
The timing was so advanced premium gas was a must and after that it could use a booster as well. I tried to set the base timing as it should be, and the motor bucks every time I spin it over, slowly stripping out the new ring gear. I have been told to swap from TBI to a Holley 600 4 barrel/HEI dizzy but I would rather spend the money and correctly wire the TBI for the reliability (cold weather starting, MPG, etc) than do the carb swap seeing all the parts and rigging necessary to do said swap.
If it would be better I am willing to carb swap but it seems to me it would be better to rewire the stock TBI and regain the reliability of the TBI system and not have lights on in the dash (pet peeve) than it would be to swap to a carburetor setup. The only reason I'm considering this is for the ease of cam choice, being the computer doesn't have to accept it so I could go as big as I wanted, no worries.
Any ideas on what causes the bucking? We set the timing and as long as the dizzy wasn't tightened down, it wouldn't buck. But when it was tightened, it started to buck and strip the gear. I need this fixed ASAP, seeing as this is my only mud/trail truck.