I have a weird idle return after driving the truck. If I push the clutch in and come to a rest at a stop light, the RPM's will idle at about 1100 or so for a little while then slowly drop to about 800 ish or less, but much lower than the 1100. What causes this. It does not matter if the truck has been driven 1 mile or 1000 miles.

93 F150 5.0L 5 Speed 4x4

I know this can't be good for gas mileage.

Also got a recall from Ford, my 1993 F150 has not had the fuel pressure regulator replaced yet. Anyone know what the problem was with them?

Thanks,

Justin

 

I beleive they were recalled because of a cross flow of fuel between the front and rear tanks.

 

The fuel,pump thing was a different problem, different recall. I seem to remember something about diaphragm failures. Don't remember if it was a safety or an emissions thing though, maybe both.

 

Your truck also has a recall for the ignition module. I've been getting the letters off and on for some time now. Someday soon I'll have to get the truck in for those recalls.

 

Take a look here:
http://www.ford-trucks.com/dcforum/D...ID18/1515.html
and then here:
http://www.ford-trucks.com/dcforum/D...ID18/1675.html

Hope this helps....

 

I think the ignition modules were a lawsuit not a recall, I got the same thing. As for the fuel pressure regulator, the diaphram was failing and pushing fuel into the vaccume system. As for your problem, you might want to try and clean your idle control valve. Sometimes carbon can build up.

 

I know that most cars and truck stay idled up over 1000 RMPs while the vehicle is moving, to keep the accessories running at their peek performance. For instance, the power brakes. My truck and my mustang will keep a higher idle after pushing the clutch in until I come to a complete stop and then they fall down below 1000 rpms.

It shouldn't be a problem. I think it is a percaution to make sure your brakes work their best even when your rpms are down.

I may be wrong, but thought I would throw my 2 cents in there.