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· Registered
1992 ford bronco 5.0 302
36 Posts
Discussion Starter · #1 ·
I recently just dropped a new 5.0 crate engine in my 92 bronco along with an new exhaust. I am having some issues in the engine department though, my engine idles great but when i press the throttle i have hesitation and when i let off it wants to choke out for a second and then comes back to full idle. I have not checked my fuel pressure yet but i checked my alternator with a multi meter because when i rev the engine the voltage tachometer shoots up to about 17 18 and then when i let off it goes back down to 14 to 15. When checking my alternator i get about 11.85 volts under load when i rev it up i get 12.5. I am assuming that my alternator is bad and it needs to be swapped but is there any chance the alternator can create hesitation in the acceleration of the engine. I took it on a test drive and the engine cut off on me twice but started right back up so that's a signal of alternator failure to. Thanks for the help


· Super Moderator
33,938 Posts
Yo Koerey,
Try a Self Test for Diagnostic Trouble Codes (DTC)s by my pal, BroncoJoe19 @ Code Reader

Some no code usual suspects by Ford;
Vacuum leak, see my leak diagnosis link in post #11

Air filter, is it relatively clean?
Air inlet atop radiator support to filter box and to throttle body; look for obstruction; damaged tubing, openings in tubing, loose fit at throttle body or at MAF sensor. Is the air fiklter a K&N type? If so, coukd be over-oiled?

Fuel quality; Oxidized fuel often turns darker over time and may even smell sour. You can check stored gasoline by pouring some into a clear glass container and comparing it side-by-side with known fresh gasoline. If your old sample looks noticeably darker than the fresh gas, you have strong evidence the gas has gone bad.

Electrical connectors; inspect for corrosion, etc, at coil, firewall, ICM, distributor, PCM, etc. Especially those with broken locking tabs.
Here's the 1992 Bronco Dealer Brochure @ Bronco_1992.pdf

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 (75 posts required to view, due to scammers who preyed on our members ).

Register with VIN to see most Ford dealer maintenance/repairs done @ any dealership nation-wide @ Welcome to Ford Owner | Official Ford Owner Site

To save you time and for better responses, please fill out your Bronco info with location, year, engine size, transmission type, transfer case type (manual or electric shift), locking hub type (automatic or manual) info & major mods such as a Lift, etc. .
Bronco info is now able to be put under your user name.
Click your profile button in the top right and go to account settings.

On that first page, named Account Details, scroll down to "Vehicle Info" and type in up to 100 characters.

Now you can simply enter your information in the text editor and click save.

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