fuel pressure rough idle

[Iggy flywheel]

Hi folks last week she started running and idle rough. I have gone over all the vacum leaks the tran o/d was leaking plus tranny fluid. I have not tightened the intake manifold yet but check with soapy water for leaks.

I changed the plugs cleaned the IAC the plunger wouldnt move freely. It runs much better but I still have the rough idle. Its more like it bumps then smooths out for awhile then it starts bumbin. its not as severe with the new plugs.

I check the fuel pressure and its at 32 at idle with vacum off it about 40 more like 38 and it held pressure for over 7 min without droping. Should I change out the pressure regulator anyway?

I got plugwires on order will but those on when they get here.....

any thoughts on trouble be grateful..........

 

[steveissteven]

According to FORD, fuel pressure should be between 35-45 psi at idle increasing t0 40-50 psi with vacuum removed from the Fuel Pressure Regulator! Perhaps your fuel pump is getting tired? Check your fuel filter also!

Hope this helps!

 

[Iggy flywheel]

rough idle

It was inspects with the Haynes 30 to 40 vac off 40 to 50.
It would raise to 36 when i raised the rpm abit.

The filter was changed a year ago. I also check the EGR. It would hold vacuum and diaphram moved.

It has about 67000 miles on it.