sta500666
1/2 ton status
I am lookin at a 1989 1-ton chevy with a 454. My question is did 1-tons go to fuel injection at a later date then half-ton chevy's? I ask becaus the '89 454 is carburated on this truck...
CK5
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454 Question
- Thread starter sta500666
- Start date
3car
1/2 ton status
87 TBI started in 454's, but I've heard some 87 and 88's were still carbed.
In some states vehicles, particularly trucks, are registered by year of manufacture instead of "model" year. You'll see some TBI trucks listed as 1986 for this reason.
However, GM did not offer carbs on any of the trucks in 1989, I am reasonably sure of that. Somebody done hacked that truck up, prolly 'cuz the TBI developed an issue and they were too lazy to fix it ... or the 454 got dropped in. (A carb won't just drop onto a TBI intake, will it? I forget.)
I would check the numbers on the block and the carb, if you can find them, to see what's been played with ... but that thing sounds suspiciously cobbled together.
-- A
BBC's on the earlier stuff used a 4bbl intake with a TBI adapter.
sta500666
1/2 ton status
well it turns out it was tbi... I guess i shoulda looked at it first before jumping to conclusions. The guy that owns it thinks its a carb so i was just going on his word. truck ran good tho and he only wants $550 for it! body is rough but its a 454 4speed 4x4. I dont know if I'm ganna get it or not.
71 Blazer
1/2 ton status
I have an 88 GMC 3500 with a carb and from what I have learned it was the last year a carb was offered, only 14% of them came with carbs.
3car
1/2 ton status
Good god, I wouldn't have to think twice about it.
3car
1/2 ton status
I've never personally seen a factory carb'er after 86. who knows
71 Blazer
1/2 ton status
I could take a picture?
3car
1/2 ton status
Not saying I dont believe you. Just never seen one.I could take a picture?
3car
1/2 ton status
But you can still take a picture.
sta500666
1/2 ton status
so if i were to get this truck the engine would be going in one of my shortbox '67 C/10's. I would probably want it carburated, so how hard is it to convert? What are the major things to know? $550 just seems like a really nice deal for a 454 that runs good, and I think he might go lower.
3car
1/2 ton status
the TBI 454's had a q-jet intake with an adapter for TBI. Remove the adapter and the carb will bolt right on. If you have a complete truck to rob parts from, why not keep the TBI.. And $550 is a steal.
sta500666
1/2 ton status
what does it all take to run the tbi? do you have to have a pressurized fuel system?
Just for general info, *early* 454 TBI used a plate. My '91 manual clearly shows that the intake is not designed for a carb.
Not sure what year that stopped, it's probably been posted I suspect.
Two observations: To the uninitiated, TBI looks like a carb, 'cuz the fuel line runs up to the thing on the intake. Many people, when they think of fuel injection, think of multi-port types where there's a fuel line for each cylinder.
Second, as for an '88 with carb, post up the VIN. That will identify which engine/fuel delivery combo it came with from the factory... a pic just shows us what it is now
-- A
Second, as for an '88 with carb, post up the VIN. That will identify which engine/fuel delivery combo it came with from the factory... a pic just shows us what it is now
-- A
