My truck keeps spitting gas out the top of the carborator.

Asked by May 05, 2017 at 03:39 PM about the Chevrolet Silverado 1500

Question type: Maintenance & Repair

Each time I start it, the carborator starts spitting
out fuel. The year is a 1993.

10 Answers

17,075

Is this a throttle body to carb conversion including the whole engine conversion, or better said did you mean throttle body or is it a carb? If so and you still have the factory pump set up you have too much fuel pressure. 6-8psi is enough anything higher then that can easily blow past the needle and seat and over fill the bowls or your needle and seat need to be cleaned. Or an ignition problem. What ignition is on it? May be backfiring or trying too.

17,075

Timing may be off.

OK. So is there a way to lower the pressure on the fuel pump.

17,075

Well whats the deal with the set up questions above? In 93 none had carbs on them. I need to know if you have converted it or not. Is it still a throttle body car?

17,075

I tell you what have your fuel pressure tested and find out what the numbers are and what the engine set up is and come back with those answers, otherwise its just shooting in the dark.

17,075

If pressure is too high for a carb and you have a fuel pump in the tank designed for the throttle body fuel injection then you need a high dollar fuel regulator to get down to under 10psi and adjust the fuel pressure at carb going in down to 6-8psi or change out the fuel pump for a frame rail designed pump for carb's with a fuel regulator for a carb if yours is indeed a carb.

17,075

If this is a stock set up for 1993 and you changed out he intake for a carb and intake for carb, do away with the fuel return line by frame rail fuel pump design or use adjustable fuel regulator with provisions for no return line(without), then you also need a distributor for non computerized. Bronze cam gear, independent trans module. But like said above if its actually a throttle body and not a carb then this all for knot and you have other issues.

OK I will will check the fuel pressure and see what I get. Thank you for your help.

17,075

Alright

1,255

have a fire extinguisher handy

Your Answer

Add photo

Related Questions

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 6,684 nationwide Silverado 1500 listings starting at $2,339.

Postal Code:

Search Chevrolet Silverado 1500 Questions

Chevrolet Silverado 1500 Experts

#1 John Carson
John Carson
Reputation 2,340
#2 Rowefast
Rowefast
Reputation 1,930
#3 Silverado_owner_2006
Silverado_owner_2006
Reputation 1,650
View All

Related Models For Sale

Used GMC Sierra 1500
158 Great Deals out of 7,843 listings starting at $3,333
Used Ford F-150
303 Great Deals out of 8,874 listings starting at $1,600
Used Dodge Ram 1500
68 Great Deals out of 545 listings starting at $2,985
Used Chevrolet Silverado 2500HD
8 Great Deals out of 836 listings starting at $4,949
Used Toyota Tundra
10 Great Deals out of 714 listings starting at $4,999
Used Toyota Tacoma
15 Great Deals out of 826 listings starting at $10,500
Used Chevrolet Tahoe
494 listings starting at $4,995
Used Ram 1500
358 Great Deals out of 23,034 listings starting at $710
Used Chevrolet Colorado
12 Great Deals out of 1,330 listings starting at $3,500
Used Chevrolet Camaro
848 listings starting at $8,995
Used Ford F-250 Super Duty
16 Great Deals out of 712 listings starting at $4,500
Used Chevrolet Silverado 2500
5 listings starting at $7,990
Used Chevrolet Silverado 1500HD
2 listings starting at $10,500
Used Ford Mustang
4 Great Deals out of 1,358 listings starting at $5,980
Used Nissan Titan
17 Great Deals out of 708 listings starting at $5,450

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.