1994 Silverado 5.7L TBI Engine Missin...
mike m

United States

#102 Sep 26, 2011
I have a 93 silverodo 5.7 my problem is it runs great for awile then starts spiting and sputering. This does not happen every time I drive it. But when it does do it my tach jumps up when it should fall down. And when I lift off the gas it goes dead. And the only way to start it when it dies is to let it set for 2 hours or to spray ether in it. Has new o2, egr, plugs wires cap and butten. Oh and when it does this missing thing I can give it more gas or put the engine under a load and it clears up but when you let of the gas or just driveing on flat road it starts doing it again. Any ideas?
cha

Karlstad, MN

#103 Sep 26, 2011
I have a 94 chevy with a 5.7 it wont heat and tried three thermostats and the engine isnt warming up i put the scanner on it and it reads 190 and the temp jumps around.
jonathan

United States

#104 Sep 29, 2011
Change temp sensor on driverside head
808 boy

Hilo, HI

#105 Oct 3, 2011
I have a 94 z71 1500 with the same problems.I changed the fuel filter, the spark plugs & wires, IAC & the truck still surges while idling and at a stop. Does anyone have any other ideas for me? Thank you
denver

Hammond, LA

#106 Oct 8, 2011
Listen everyone who is having a problem with surging at red lights running like crap and using alot of gas you dont need to change anything all you have to do is disconnect the vacuum line from the EGR valve located on the left side of the motor behind the throttle body. also disconnect the wire from the EGR valve solenoid. this is what the vacuum from the egr valve runs too. I had the same prob with my 94 chevy truck. there are 3 different types of egr valves positive pressure negative pressure and another one i cant remember. but any how if these problems occur as soon as you crank your truck the egr valve is stuck open. if it happens after it warms up a little the egr is opening too soon. the egr is meant for cruising it is supposed to open when the throttle position is at about 5% at a steady speed. its kinda hard to explain. I unplugged the egr valve and solenoid and my truck runs like a champ.
808 boy

Hilo, HI

#107 Oct 8, 2011
To everyone that been having these problems with your truck, I just changed my Throttle Position Sensor and everything is all good. It's a cheap and easy fix. I wish I did that first before I changed everything else!
Brandon

United States

#108 Oct 10, 2011
I have a 94 chevy silvarado 5.7 4x4. Runs good once started but has very hard time getting started as if its not getting fuel. I did tune up, cap button plugs wires. First day fired right up then started spuddering at start again. Truck runs fine after its started and will start ok if been ran an still warm. New start an cylnoid as well. Any ideas? Please! Thanks
TSGT RJE

Montgomery, AL

#109 Oct 11, 2011
I also have a 1994. I had the same type of issue. I replaced the distributor,plugs,wires,fuel filter. Did not fix it. What did was a fuel pump, and the knock sensor was busted off from a starter replacment. I also changed the temp sensor and from the cat back welded a new/used but good condition exhaust. Check fuel pressure first thing. These are great trucks and with a little knowhow run forever. 207000 miles and I can still roast tires. There are alot of sensors that throw a check engine light. Good luck. O and I did all this stuff in 1 day. These are not a fighter jet. Easy to work on.
TSGT RJE

Montgomery, AL

#110 Oct 11, 2011
Brandon wrote:
I have a 94 chevy silvarado 5.7 4x4. Runs good once started but has very hard time getting started as if its not getting fuel. I did tune up, cap button plugs wires. First day fired right up then started spuddering at start again. Truck runs fine after its started and will start ok if been ran an still warm. New start an cylnoid as well. Any ideas? Please! Thanks
Fuel pump. Internal gastank. Pull the fuel filter and check fuel pressure. Make sure the exhaust is not plugged and run it for a while then check temp. on each cylinder head. Good luck.
Rich

Jackson, MI

#111 Oct 12, 2011
Have a 92 chevy 1500 w/ 305 -5.0. The plugs keep fouling out. When I take them out ther wet and smell like alot of fuel. My throttle body is shooting fuel correctly. When I first change the plugs runs great but then turn it off its like it flooded. I can hold the gas to the floor and start it same time it will start up sputter then die. Lots of smoke out of the exaust during this process, smells like gas. Check engine light came on.
freddie

Porterville, CA

#112 Oct 13, 2011
i am having the same problem i changed the fuel filter and i recieved no change truck had a tune up about 6000 miles ago. what else could be the probable cuases any help is greatly appritiated.
Rich

Jackson, MI

#113 Oct 14, 2011
freddie wrote:
i am having the same problem i changed the fuel filter and i recieved no change truck had a tune up about 6000 miles ago. what else could be the probable cuases any help is greatly appritiated.
man I'm gunna pull mine into the garage tomorrow cause I have some free time to try to solve this. My guess so far is the map sensor. I'm going to try to locate a code reader so maybe I can eliminate buying way to many parts. But from what I have read it depends on what your plugs look like. Most likely map sensor or 02 sensor, but could be bad injectors, bad ground, or bad plug wires unlikely tho, so on so forth. Your probably like me and hoping it's one of these cheaper fixs but if I solve it I'll let you know tomorrow
Rich

Jackson, MI

#114 Oct 14, 2011
So I did the Lil paper clip trick to read my codes today and it flash my check engine light w codes 13,15,22 I believe it was. 02 sensor, a temp sensor and Tbi sensor. Replaced them in an hour or so and it works great as of now. Guess I'll see in a few days. Good luck to any one else that has the problem.

The paper clip trick is simple look under ur dash were u see the spot that you would plug in a reader and place the paper clip in the top to holes furthest to the right. Check engine light will begin to flash and should start with one flash pause then two flashes. This will repeat for a total of three times then it will send the next code.
freddie

Porterville, CA

#115 Oct 14, 2011
I am having the same sputtering problem and rough idle on my 94 k1500 i channged the fuel filter air filter and sparkplugs. So the only other thing i can think of it being is the fuel pump. Any ideas??

Since: Oct 11

Location hidden

#116 Oct 14, 2011
sea foam is the answer to all of these, if not i would recommend a mechanic.
Ricky

Cody, WY

#117 Oct 16, 2011
I have a 95 GMC sierra with the 5.7L v8. Lately, Its been running super rich, and spitting and sputtering right before it shifts into a new gear. Ive changed the spark plugs, cap and Roter, Ignition Module, fuel filter, and its still doin it. Any Suggestions?
Joe m

Dallas, GA

#118 Oct 16, 2011
Recently purchased a 1994 silverado. It was cool out when I test drove and drove it home. Temp gauge was not rising above 120 or so. Sat morning I drove it to my sons game, it did fine. On our way home it warmed up and started sputtering and stalling. I changed the coolant temp sensor, thermostat and flushed the coolant system. Started it up, temp gauge now works and was in a good range. Truck was running good at idle. I took it for a drive and started sputtering and died a half mile from my house. Let it sit for a few minutes and drove back home as nothing ever happened, ran good.
RvV

New Baltimore, MI

#119 Oct 16, 2011
Harry wrote:
We found the problem with my chevy. The pick up was completely melted.
What do you mean by "The pick up is completely melted" What pick up?
securityguy

Kelowna, Canada

#120 Oct 17, 2011
Shadden wrote:
I have a 94 chevy 1500 5.7 liter. Starts and idles fine, but when I give it gas it revs up to 3000rpm the first time and after that will sputter at 1200-2000rpm and fall till it almost dies. Ive changed the fuel pump, fuel filter, distributor, spark plug wires, and air filter. Anyone have any ideas of what it could be?
Had the same problem, removed the cat convertor, fixed the problem
mac86

Sparta, NJ

#121 Oct 18, 2011
Randy Ritchie wrote:
Did you find out what was wrong? I have a 94 silverado doing the same thing.Thanks Randy
I have a 99 Tahoe and went through every replacement possible. Finally fixed it by replacing the Crank Positioning Sensor. I am sooooooooooooooooooooooooooooo Relieved!!!!!

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