86'bronco running poorly

[woods]

hello,i have a 1986 bronco with a 302 auto.the problem i am having is the bronco will start and idle great,while being easy with the throttle it will also run ok.the more fuel you give it while driving the worse it get's.symtoms are hesitation,sometimes it will even missfire,the problem also seems to get worse the longer you drive it. items replaced are as follows throttle pos sensor,fuel filter. any help would be great. their are no check engine lights or emmision lights on.

 

[Rons beast]

Hey Woods ,

Welcome.

When was the last time you did a basic "tune up" replace the cap, rotor, plugs, check timing? What condition are the plug wires in? The problem may be something else, like a vacuum leak, or EGR problem, possibly a module, but go through the basics first. Check all vacuum lines for splits or cracks.

You may also have a code or codes stored even if the CEL is not on.

You are working with EFI correct?

Good Luck

 

[woods]

had a basic tune-up about 6months ago. really have not checked too much on the vaccum leak area. how do i go about getting stored codes?

 

[Rons beast]

Hey Woods,

Check this thread. It has procedures for retrieving codes as well as checking for vacuum leaks.

It comes via miesk5 (Thank you.)

Try a Self Test for Diagnostic Trouble Codes (DTC)s by my pal, BroncoJoe19

http://broncozone.co..._mode__threaded.

This can be found in the following thread in the 80-96 Bronco Tech Support section.

HELP with self test on EEC for 351w

Good Luck

 

[green streak]

Ran into this myself a couple of months ago. Changed plugs, plug wires, and fuel filter. It turns out it was just bad gas. Ran some seafoam and stabill through it and it worked itself out the more I blew it out. Good luck

 

[woods]

Thank's for the help guy's,going to get at it today.will keep you posted.