My 1991 Ford idles poorly

[frank-id]

Today I changed all the injectors and hoses. Fuel filter is clean. The engine runs good and makes better power but the engine does not idle well. Shall I now take a compression test or is the pump tired? The injectors were changed because of poor idle and no power. Suggestions needed. Frank in Idaho

 

[franklin2]

Crack each injector line while it's idling, and see which ones make a big difference, which ones make little or no difference. That can narrow down the problem cylinder(s) for you. The ones that make little difference are the problem cylinders.

 

[frank-id]

Checked each injector.

I cracked each injector several times. I also cracked each injector after a test ride of five miles. The engine idles very lumpy and disjointed. The idle is about 625-650 rpm. When the throttle is opened to about 1000 rpm, all is good. Frank