Changed my fuel filter in the carb on my 78 pace car, now it will not idle and will only stay running at high rpms

Sounds like you prolly got some trash in the needle/seat while changing the filter. The carb is probably flooding. It happens sometimes when changing filters, or even replacing the rubber lines.
Sometimes, you can block the fuel line at the frame(or disconnect the fuel line), so it doesn't get any fuel, and run the engine until it dies(Remember to plug the fuel line if you disconnect it anywhere, so it doesn't spray fuel when you crank it.). Then, un-block(or re-connect) the fuel line, and start the car. What this does, is let the float drop all the way down, opening the needle/seat fully. When you crank the car after it runs out of fuel, the rush of fuel thru the needle/seat will dislodge the trash, and then the needle will be able to stop the fuel flow once the float level is correct. This depends on how large the debris is that is stuck in there, but this trick works most of the time for me.

If this doesn't help, you may need to dis-assemble the carb to correct the problem. You could also just remove the top of the carb with it on the car, and fix the problem.


One other thing...make sure you did not dis-lodge any vacuum lines while changing the fuel filter...Adams' Apple2008-02-29 11:01:59

Thanks for the info will check it on Sunday since I get the pleasure to work tomorrow. will let yo know.

just a stupid question. by any chance are you sure you put the filter in the right way? very easy to install backwards ( i know, i've done it). as joel said maybe some gunk got in there but i would check the easiest first

[QUOTE=Adams' Apple]Sounds like you prolly got some trash in the needle/seat while changing the filter. The carb is probably flooding. It happens sometimes when changing filters, or even replacing the rubber lines.
Sometimes, you can block the fuel line at the frame(or disconnect the fuel line), so it doesn't get any fuel, and run the engine until it dies(Remember to plug the fuel line if you disconnect it anywhere, so it doesn't spray fuel when you crank it.). Then, un-block(or re-connect) the fuel line, and start the car. What this does, is let the float drop all the way down, opening the needle/seat fully. When you crank the car after it runs out of fuel, the rush of fuel thru the needle/seat will dislodge the trash, and then the needle will be able to stop the fuel flow once the float level is correct. This depends on how large the debris is that is stuck in there, but this trick works most of the time for me.

If this doesn't help, you may need to dis-assemble the carb to correct the problem. You could also just remove the top of the carb with it on the car, and fix the problem.


One other thing...make sure you did not dis-lodge any vacuum lines while changing the fuel filter...[/QUOTE]

oh..yes... now i remember.. THAT is Joel...

checked the fuel filter twice only can go in one way, but thanks for the idea.

got it figured out EGR Valve was not properly sealed since I took it off to change the valve covet gasket. 50 degrees and sunny in Walla Walla WA time for a cruise