Need to p ull your codes

 

Have pulled, I have no codes.

 

That's hard to believe...but it could be a bad cat, or a vacuum leak. I would suggest pulling your spark plugs and seeing what they look like, compare them and keep up with where each one come out of.

 

New parts does not mean good parts these days. Rent a fuel pressure tester to verify the fuel pressure is correct.Too many times others have thrown the parts cannon at an issue to find out some of the "ammo" were duds.

 

Does the fuel pump ever shut off with key on, but engine not on? It should only run 3 seconds or so. Mine did the same thing and the 'puter needed a rebuild.

 

Just used a smoke machine and it's a bad vacuum leak. Thanks for the help guys.

 

I have a 95 302, I had very little power but engine was running smooth. Ordered the walker exhaust system with single cat from rock auto for around 400$. It sure solved my problem. night and day difference.

 

The Vacuum leak just fixed the brake pedal being super mushy, going to cut the cat off and see if it does anything.

 

Yo Zerbie,
Welcome to our DIY BIG Bronco community!
See my Vacuum leak test in post #11 includes jowens1126 HVAC Control Panel info @ Help with dtc codes and idle
Excerpts:
When vacuum leaks are indicated, search out and correct the condition. Excess air leaking into the system will upset the fuel mixture and cause conditions such as rough idle, missing on acceleration, or burned valves. If the leak exists in an accessory unit, such as the power brake, the unit will not function correctly. Or Air Conditioning when in MAX mode may switch to Defrost.
●
Here's the 1988 Ford Bronco & Truck Electrical and Vacuum Troubleshooting Manual (Ford), Emissions Maual & Service Manual by Larry J via member Kingfish999 in Google Drive @ 1988 Ford Truck Service Manuals (Thank you Larry Jorgensen) - Google Drive
View attachment 186108
The Blank one on left is not downloadable and EVTM is Blank one on right side.

1988 Bronco Dealer Brochure @ https://www.broncocorral.com/resources/1988_ford_bronco_brochure.pdf

Haynes Red Manual for 80-95 Bronco & F Series @ Hanes guide 80-96 bko f series.pdf by member BroncMom!

See my mostly recovered View attachment 202203
site by member schwim @ Ford Bronco And F-150 Links - FORD BRONCO

For any Bronco questions or to chat about it's planned modifications or build, it's better to post each seperately in Noobie Bronco Tech Questions. Flame free zone. This will get more attention and you can build up your post count to get into other sections such as Bronco and Ford Parts/Accessories (50 posts required to participate due to scammers who preyed on our members).

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Al

 

I'd check your ignition system also, make sure distributor is advancing properly. Sounds like your flooding it out. A little more info would help, does it ping before shutting down? Can you feather the pedal to get Rev up, Is it different in park vs drive, under load? I'd start with distributor pick up and possibly check ecu capacitors. Vac leaks and solenoid failures tend to cause stumbling and roughness vs shutdown as well as throw codes, fuel issues tend to prevent starting and idle issues more than accel. Very rare to have plugged exhaust and would usually cause power loss or no start, not stalling on acceleration. My gut says electrical.

 

Noted, once I replaced the fuel pumps it no longer shuts off and idles fine but I can rev it all the way to the floor in the park, not while I'm in gear, it loses response at about half throttle. It runs a lot better ever since I turned the A/C off which also makes me believe it could possibly be electrical, alternator maybe?

 

Dead spot on throttle position sensor?