I phoned a guy about a work truck, its a 94 chev Z71 4x4, I haven;t seen the truck yet, but he couldn't tell me if it was carb or fuel injection. Would anyone know what that yr would have?

 

It's fuel injection. Carb ' s disappeared in the mid to late 1980's for most.

 

TBI (throttle body injection.
My neighbor has a 98 Chevy 4x4 2500 5.7L that I work on.
Plus dad before had a 95 Chevy Z71 1500 5.7L.
Trav

 

Throttle Body Fuel Injection. Looks like a carburetor on top of the intake manifold but will have two inverted dome shaped injectors firing down onto the venturis.



If you think that looks like a crappy idea, that's because it is. GM could not invent a working port fuel injection system that didn't infringe on Bosch patents, so they gave up on the idea and sulked for a couple decades rather than do what everyone else did and just buy a license.

 

theres always a possibility someone swapped the tbi out for a carb, but its easy to see whether its carb or not in person.




interesting note. I don't like tbi, but its not really that bad of a system for all intents and purposes of the normal person. and they are abuuuuuuuuundaaaant as hell.

 

TBI... may as well be a carb.. they flood out just as easy.

 

And just as hard to start cold as carbs.
Personally it is one of the things I dislike about chevys of those years otherwise I love them.
Trav

 

I owned a tbi van for 5ish years, i didnt drive it all the time but someone normally was using it. I never had a problem with it even in some 0* weather...sold it with 200k for peanuts but it still ran good.


on the other end of the spectrum, when I was 18 I had an old 86 buick "4tec" for a beater that I got for free, and it was a poopbox. hard to start when it was moist (humid or precip). I kept a can of ether with me for those times.

 

the guy claims he got 19 miles per gallon with it. should I avoid it with that fuel injection system?

 

19 is silly. 13-14 from a 1500, believable.


i don't like buying stuff from idiots, but its all about the price.

 

thanks . I'll look it over close. I see he said tranny was done, I googled around and it looked pretty common to see these years trannys rebuild. must be weak

 

http://classifieds.castanet.net/details/truck/2214936/ heres the truck

 

TBI is simple and very reliable. Gasket under the throttle body is known to crack and leak.

 

that's more like a 2/5 ton truck...actually mid-high teens for mpg isn't entirely out of the realm of possibility. hes still not regularly averaging 19, but that's a small and light truck...id say 15-16 avg more like it regardless. but, seeing the truck, i recant my statement about the seller being an idiot based solely off mpg claims.

 

I loved my '93 GMC Sierra. Wish I hadn't sold it. The Z71 is an awesome truck.

Nothing wrong at all with the injection system, but I'd be surprised if that truck could get 19 average with a 4x4. I know the base model V8 can get around that much driven gently.

And sorry to say this here in Ford world... About America's biggest selling truck. The GM pickups outsell Ford if you add together both Chevy and GMC sales. Let's just say both Ford and GM make great full size pickups, bless 'me all.