Are there replacement throttle body fuel injectors for a 1994 350 cu. in. to improve gas mileage

Asked by Sep 29, 2013 at 02:54 AM about the Chevrolet C/K 1500

Question type: General

I have a 1994 K1500 Z71 4X4 Off Road Silverado.  When I first purchased to truck used I was getting a wonderful 20 mpg city and 22 mpg highway.  I had a tune-up a year later with a hotter coil installed along with 8mm plug wires and copper core spark plugs, now I'm getting @ 15 mpg/18 mpg.  Why such a radical change?  I thought this would help.

3 Answers

19,035

15/18mpg is the normal. I have no idea how you saw 20+mpg in the first place

10,575

Yah I'm with andrew. My '92 would peak at 14 on it's best day. Try putting the old parts back in? The 5.0 or 4.3 injectors flow less you could try them but that would lean out your motor which may cause other issues down the road. Have you changed the o2 sensors recently I believe the '94 had 2? The spark upgrade may have affected something else?

19,035

i do know the factory coil is more than enough spark for these trucks, a hotter coil is pointless. Especially when still running copper plugs

Your Answer

Add photo

Related Questions

  • Are there replacement throttle body fuel injectors for a 1994 350 cu. in. to improve gas mileage 3 answers

    I have a 1994 K1500 Z71 4X4 Off Road Silverado. When I first purchased to truck used I was getting a wonderful 20 mpg city and 22 mpg highway. I had a tune-up a year later with a hotter coil install...

    Chevrolet C/K 1500

    -

    General

  • Can someone tell me the original horse power that came in a 1994 Silverado 350 (5.7L) short bed 4x4 2 answers

    block #14093638.....head #14102193 1994 Silverado....4x4.....automatic w/ over drive....throttle body....Z71......A/C, P/S, P/B....electric windows........

    1994 Chevrolet C/K 1500 Silverado Standard Cab SB 4WD

    -

    General

  • Gas mileage 2 answers

    How far can i get in my 96 silverado 5.7L with a full tank of gas?

    1996 Chevrolet C/K 1500 Silverado Extended Cab LB

    -

    General

  • How to Increase Fuel Mileage on '88 Chevy P/U? 4 answers

    I have an '88 Chevy Single Cab 1500 2WD with a 350. Basically stock. It was short blocked at 100K with a tranny rebuild at 130K, and currently has 180K. I put it in the garage 8 years ago and basic...

    1988 Chevrolet C/K 1500

    -

    General

  • Gas Mileage 3 answers

    I have a 1994 Chevy K1500. I seem to only be able to get 10 mpg city. I have a singlestraight pipe, 3" from the headers to a 5" tip. I dont drive very far all the time but the little miles add up. ...

    1994 Chevrolet C/K 1500 Silverado Extended Cab SB 4WD

    -

    General

C/K 1500

Looking for a Used C/K 1500 in your area?

CarGurus has 910 nationwide C/K 1500 listings starting at $2,500.

ZIP:

Search Chevrolet C/K 1500 Questions

Chevrolet C/K 1500 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 3,550
#2 John Saffrahn
John Saffrahn
Reputation 2,550
#3 Rowefast
Rowefast
Reputation 2,150
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,086 Great Deals out of 183,308 listings starting at $1,900
Used GMC Sierra 1500
783 Great Deals out of 67,904 listings starting at $1,699
Used Ford F-150
2,204 Great Deals out of 180,758 listings starting at $1,500
Used Chevrolet C/K 2500
192 listings starting at $6,499
Used Dodge Ram 1500
403 Great Deals out of 10,670 listings starting at $1,500
Used Chevrolet Silverado 2500HD
343 Great Deals out of 29,296 listings starting at $990
Used Chevrolet Silverado 1500HD
11 Great Deals out of 271 listings starting at $4,300
Used Chevrolet Tahoe
610 Great Deals out of 35,916 listings starting at $1,000
Used Chevrolet Colorado
256 Great Deals out of 29,228 listings starting at $2,395
Used Toyota Tacoma
551 Great Deals out of 41,654 listings starting at $2,999
Used Chevrolet Camaro
418 Great Deals out of 31,646 listings starting at $2,395
Used Chevrolet S-10
8 Great Deals out of 1,263 listings starting at $999
Used Chevrolet C/K 3500
233 listings starting at $4,597
Used Toyota Tundra
421 Great Deals out of 33,600 listings starting at $1,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.