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Hi, New to Bronco ownership and new to the forum. Bought a 94 1 owner Bronco a couple months ago. It has the 5.8 and 234K miles. It sat for a couple years before they brought it back to life and I purchased it. The dealer i bought it from said they had to run a lot of fuel system cleaner through it to get it running again along with some fluid changes etc.

When it has sat for several hours and is completely cold it fires up immediately. If it is warm and I shut it down and re-start it takes several seconds to start and then runs rough for 10-15 seconds. I am about to do the 6 Liter tune-up but interested if anyone knows what may be going on with the warm-start issue first?

Thanks!
 

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could be as simple as vapor lock. could be pre-ignition (knock) from the heads getting very hot after a shutdown and no coolant flow through heads so they get real hot for the first 30min-1hr.
 

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82 XLT Lariat 351w, Edelbrock 1406 4bbl ,C6 auto, auto locking hubs ,33x10.5x15
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How much space is between the starter and the headers/exhaust?
 

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Yo MN94,
Welcome!
Try a Self Test for Diagnostic Trouble Codes (DTC)s by my pal, BroncoJoe19 @ Code Reader

The engine temperature must be greater than 50° F for the Key On Engine Off (KOEO) Self-Test and greater than 180° F for the Key On Engine Running (KOER) Self-Test. Run it around to heat the engine up and shift thru all gears including Reverse. Make sure A/C is off and transmission is in Park (automatic); or in Neutral for a Manual & release clutch. Then turn off engine, all accessories/lights (close driver's door) , etc.

Do KOEO test First. Post Code(s) here according to KOEO & KOER.
A helper can assist you by counting the codes. Some use their smart phones to record them.

BEWARE OF FAN, BELTS, PULLEYS, HOT HOSES, IGNITION HIGH TENSION WIRES, AND ENGINE COMPONENTS

Or ask local mom and dad parts stores if they will test it for you.
Or purchase a coder reader such as Equus 3145 Innova OBD I Code Reader for Ford EEC IV Engines at Walmart & most parts stores.

Some possible tests:
TPS Test by Seattle FSB


IAC Test
post #7 of 10 by some Jerk

Engine Coolant Temperature Sensor (ECT) Test
by Ryan M.
□▪□
See 1994 Bronco Dealer Brochure by Ford via Dezo's Garage @ https://www.xr793.com/wp-content/uploads/2020/07/1994-Ford-Bronco.pdf

1994 Bronco Brochure, Partial; Cover & Page 3; plus pics of EDDIE BAUER model accessories.
by Ford via BigRob at 1994 Ford Bronco Bronco Accessories pictures, videos, and sounds | SuperMotors.net

ASAP, find out if speed control recall work, if equipped was completed @ Recalls Look-up by VIN (Vehicle Identification Number); or @ Welcome to Ford Owner | Official Ford Owner Site; or ... have VIN ready. While there, see most Ford dealer maintenance/repairs done @ any dealership nation-wide.
"Summary: ON CERTAIN PICKUP TRUCKS, PASSENGER VEHICLES, SPORT UTILITY VEHICLES, AND MOTOR HOMES CHASSIS, THE SPEED CONTROL DEACTIVATION SWITCH MAY, UNDER CERTAIN CONDITIONS, LEAK INTERNALLY AND THEN OVERHEAT, SMOKE, OR BURN. THIS COULD RESULT IN AN UNDERHOOD FIRE."
See this guide by jowens1126 to confirm recall status @ 93 & 94-96 Cruise Control Recalls Repair
Note that the 93 recall is different than 94-96.

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.).

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.

Our Forum FAQs includes for example, How To Upload Images To Posts, How to Use Search, How To Save (Bookmark) Threads Or Posts & more tips!

BabaLooey's Favorite FSB Links (lots and lots of tech links) ... includes such as, "Tailgate Window repair & troublehooting."

Try to find time to participate in our current Full-Size of the Month Contest (soon to be Quarter) & later in the year Full-Size of the Year Contest @ Voting
You will get ideas by those competing. Also see the prizes! They are awesome as compared to other sites' "contests"!
Al
 
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