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I have a 88 bronco that cut off soon as I drove it out thr drive way.When I start it up the idle sounds rough. I’m guessing it’s and fuel or vacum hose issue.What do you guys think it could be and what should I start with ?
 

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Yo John,
Welcome!
See my Vacuum leak test in post #11 incl jowens126 HVAC Control Panel info & Mikey350 tests @ Help with dtc codes and idle

Excerpts;
One way to do a quick check is to grab a vacuum gauge. Some parts stores will loan you a gauge with refundable deposit.
The vacuum gauge should read between 15 and 22 in-Hg depending upon the engine condition and the altitude at which the test is performed. SUBTRACT ONE INCH FROM THE SPECIFIED READING FOR EVERY 1,000 FEET OF ELEVATION ABOVE SEA LEVEL.
The reading should be quite steady. .
When engine is rapidly accelerated (dotted needle), needle will drop to a low (not to zero) reading. When throttle is suddenly released, the needle will snap back up to a higher than normal figure.

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.


Try a Self Test for Diagnostic Trouble Codes by my pal, BroncoJoe19 with info by Mikey350 @ Something wrong



162696



Here's the 1988 Bronco Dealer Brochure via member sneal @ 1988 Bronco Dealer Brochure part 1... site upgrade rules limit maximum of 10 images per post
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Al
 
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