[chevyman992002]

My dad's 95 4.3l starting killing on him today. It will idle rough for a few seconds before you have to tap the gas pedal to keep it running. If you push too hard on the gas pedal, it will kill. I don't know if this is a clogged fuel filter or if it might be blocked injectors. Does anyone have any ideas? Would running seafoam through it help it out at all? We're going to try changing the filter and running either injector cleaner or seafoam through it tomorrow to see if we can get everything cleaned out. Does anyone else have any ideas or suggestions?

 

[MeanGreenZ71]

Yeah. Try the Seafoam and Fuel filter. It cant hurt. The FF needs to be changed on a regular basis especially if you get fuel from stations that have dirty tanks. I try to change mine out every 12-18 months. Im due for a new one now. Thanks for reminding me. lol

 

[chevyman992002]

Thanks. Hopefully that will do the trick

 

[Covah]

If that doesn't work, open up the distributor cap and check the condition. THose 4.3's seem to go through them pretty quick.

 

[chevyman992002]

Filter and seafoam didn't work still won't run without tapping on the gas. If you let off the gas or push too hard it kills

 

[MeanGreenZ71]

Id go with what Covah says and try checking out the dizzy. Take the cap off and make sure the rotor looks OK.

 

[chevyman992002]

There is some corrosion under there so we're going to go get a new cap and rotor.

 

[chevyman992002]

No dice on the cap and rotor. Didn't work.

 

[MeanGreenZ71]

Is it spraying a good mist of fuel? Good fuel filter? Clogged cat? Bad spark plugs? clogged air filter? Also check your spark plug wires and make sure youre getting good spark. Mine cranked and ran like crap one day then an hour later wouldnt crank at all. The wire from the coil to the dist. was deteriorated inside and wasnt allowing a strong enough spark.

 

[Covah]

Always goes to the basics: Fuel, Air and Spark. You have to eliminate each one as a problem, one at a time, at the last point of entry into the engine. Fuel getting in? At proper pressure? Spark at the plugs, air getting in, ( and out, like exhaust free flowing ). If you find an issue at the last point, work your way "back" until you find that cause.

 

[Longbed]

weak fuel pump possibly? How does it run on the highway?

 

[D_mentedchevy]

yeah weak fuel pump maybe same thing happened to me a while back i change the pump and filter and worked like new again

 

[Trevor F]

x3 on fuel pump mine did the same. replaced it and was good to go. Dont get a cheap one. Try a bosch

 

[Longbed]

if you get one just dont get it from autozone or you will be doing it agin within 6 months....