shut off while driving and will not start

1991 FORD BRONCO
120,000 MILES • 5.8L • V8 • 4WD • AUTOMATIC
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DFERRIS2069
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Parked it over night came out the next day and started it but when i gave it gas it wanted to stall out. i let off and it stayed idling but then it started to idle lower and lower in rpm's and stalled, now it does not start. ran codes with Ford scanner and got trouble codes 21, 24, 26, 33, and 34. prior to stalling there was an intermittent check engine light associated with the 33, and 34 codes.
Nov 14, 2017 at 2:24 AM
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JACOBANDNICKOLAS
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It sounds like the EGR is stuck open. Remove it and check to see if there is carbon between the pintle valve and seat preventing the valve from closing. Also, make sure there is no carbon build up issues in the intake. Let me know what you find.
Nov 14, 2017 at 7:13 PM
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DFERRIS2069
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Okay, so I pulled the valve off and although there was not much carbon build up there was a little bit so first thing I did was vacuum out intake, then the valve, and the tube just cause I was there. Then I cleaned out the valve as best as I could. I am going to put new gasket and clean valve back on tonight. Should I worry about the other codes before attempting to fire it up? Or could those just be due to the truck being cold and in operable at the time of the test?
Nov 15, 2017 at 5:05 PM
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JACOBANDNICKOLAS
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Lets see if fixing the EGR issue eliminates other problems. Let me know.
Nov 15, 2017 at 8:27 PM
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DFERRIS2069
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Cleaned egr, put it back on and it fired right up. Which is better than the last time i tried starting it but after maybe a minute of just idling it stalled again. This time i noticed that i heard fuel pump kick on and prime immediately following the stall. Not sure how long the priming would have lasted if i wouldn't have turned it off...
Nov 17, 2017 at 12:33 AM
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JACOBANDNICKOLAS
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Try clearing the codes to see if there are any changes.
Nov 18, 2017 at 9:18 PM
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DFERRIS2069
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Tried clearing the codes but that didn't work I was unable to get them to clear... I tried to clear them using the jumper wire and nothing changed. im starting to think I have a bad eec. Although it is entirely possible the egr may still be problematic. Not sure what to do next.
Nov 20, 2017 at 1:13 AM
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STRAILER
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When the engine does not start can you check for spark of the ignition system please here's a guide to help you see what to do.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Please let us know what happens.

Cheers, Ken
Nov 22, 2017 at 11:30 AM
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DFERRIS2069
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It always starts up the first ttry but after about a minute it stalls. If i give it any gas it stalls imediately and then if i try to start it back up sometimes it will run for a few seconds then stall again but after that itll just crank it wont fire up a third time. When i start it the first time and it runs for that minute it runs just fine, no idle issues, it doesnt chug, it doesnt make any weird sounds it just wont stay running...
Nov 22, 2017 at 2:29 PM
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TRUNKMONKEY91
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Engine Performance problem
1991 Ford Bronco V8 Four Wheel Drive Automatic 130000 miles

So recently I replaced the fuel pump, and had a shop replace the EGR valve and fuel pressure regulator and make sure everything is correct. The shop computer says there are no problems and everything checks out. So, the problem is when I am driving and slow down to take a turn, the engine all of the sudden dies. Before taking the turn, there are no visible symptoms, the engine seems to be running fine even when I am slowing down. This has only happened twice, and from the speed I can see before I lose all power it is about in the 15MPH-20MPH range. There isnt anything I can think of that leads to this problem. I'm suspecting maybe a failing computer. Ideas?
Nov 24, 2017 at 5:01 PM (Merged)
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RACEFAN966
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Ok have the idle air control valve ohmed or ohm it your self if you have a digital multi meter. Just simply unplug it and ohm it. Has the throttle plates been cleaned? If not clean them with throttle body cleaner. Get back to me with the ohms.
Nov 24, 2017 at 5:01 PM (Merged)
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DIGGLER69
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Engine Performance problem
1991 Ford Bronco V8 Four Wheel Drive 72,000 miles

72,000
Nov 24, 2017 at 5:01 PM (Merged)
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JACOBANDNICKOLAS
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Did you have a question?
Nov 24, 2017 at 5:01 PM (Merged)
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JEEPJSERIES
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Engine Performance problem
1991 Ford Bronco V8 Four Wheel Drive Automatic 195000 miles

I have a 1991 ford bronco 5.0 liter 302. I recently discovered the map senser was bad . It was creating a power loss so i repaired that now when im driving down the road ive noticed some times when i floor it in gear it dies for a second? Also the transmission isn't acting right when I put it into gear it takes a second to react. I checked the fluid its old but it dosent smell burnt should i just change the fluid and the filter?
Nov 24, 2017 at 5:01 PM (Merged)
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ATKAPARKING
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You might have a couple separate problems. Does the vehicle actually die when you accelerate, or just bog down? Changing the transmission fluid and filter is a good start--make sure to clean the pan out with carb cleaner or brake clean. I don't usually recommend snake oil but I've had good luck with Lucas transmission additive--its really slick and thick, so it helps increase pressure in the clutch drums as well as free up pieces in the valve body which control the shifting. Start with a trans service and go from there.
Nov 24, 2017 at 5:01 PM (Merged)
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RONALDJUNIOR1983
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Engine Mechanical problem
1991 Ford Bronco V8 Four Wheel Drive Automatic 150000 miles

this is what i've done so far in order....checked fuel lines when it would not start. plenty of fuel no frozen line. looked at spark plugs it was burning very very rich. changed the o2 sensor, plugs, plug wires, distributor, rotor. tryed starting and it would fire up but stall right away. replaced the idle air control sensor. fired up and idled good no service engine light like before the iac replacement to keep it going you had to hold it at a higher rpm and the chech engine would come on. after the sensor replacement and a good idle for bout 20 min nice and hot i took it around the block 4 the first and it ran really god a lot more pep but then the check engine light came on. got it back home tried to park it in a tight spot started to run rough again and kept stallin. i had to park it bak in the snow so i was giving it more power than usual but kept stallinuntil i got it to the right spot. tried starting it again and it wants to stall everytime like before the replacement of the iac...... could it be the throttle positioning sensor or the drive idle sensor or i you have any ideas please let me know.i was told most check engine lights r from emission related sensors is that correct cause this is the route i've been taking....ronnie
Nov 24, 2017 at 5:01 PM (Merged)
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JACOBANDNICKOLAS
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Ronnie:
The check engine light can point you in the right direction for many things. And yes the TPS can cause an idle problem. If the check engine light is coming on again, have is scanned and see if the problem has changed. Your problem could be a plugged cat converter, fuel pressure regulator, TPS, vacuum leak...

Let me know what you get when you rescan it.

Joe
Nov 24, 2017 at 5:01 PM (Merged)
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BELENTHIAN
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I have a 1990 Ford Bronco, 5.0L V8. I have an ignition problem. Ive checked the fuel pump, its fine. I have checked the starter it is still good. just replaced the battery, and sparks and plugs are about a year old they are still good. I have pulled the steering wheel and ignition. I have also checked the ignition switch, it doesn't seem to be the problem. when I turn the key or push the lock aculator in, the truck will turn over and start perfectly fine, but when i release my hand from the key or aculator it will die on me. Its not seeming to fall back into the run position it is either slipping or missing. I don't know what to do . Any Help??
Nov 24, 2017 at 5:01 PM (Merged)
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RASMATAZ
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Test the ignition switch and inspect the cylinder lock sounds like the problem is coming from there
Nov 24, 2017 at 5:01 PM (Merged)
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BELENTHIAN
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ive inspected the cylinder lock. It seems to be working fine. It rotates right and i dont think its coming from there. May I ask where the ignition switch is. someone else said that may be the problem but I can not locate it.

Thank you
Nov 24, 2017 at 5:01 PM (Merged)
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CJ MEDEVAC
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IF MY INFO IS CORRECT, THIS IS WHAT IT LOOKS LIKE

http://www.autozone.com/autozone/parts/1990-Ford-Bronco/Ignition-Switch/_/N-igpbnZ9n859?filterByKeyWord=ignition+switch&fromString=search

THIS MAY SORTA CLUE YOU IN, ON WHAT'S INVOLVED

https://www.2carpros.com/questions/1989-ford-f-250-remove-ignition

THE MEDIC
Nov 24, 2017 at 5:01 PM (Merged)
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CARADIODOC
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Sounds like you have a burned out ignition resistor going to the ignition coil. It is bypassed during cranking so the engine will run while the ignition switch is in the "crank" position.
Nov 24, 2017 at 5:01 PM (Merged)
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BELENTHIAN
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allright.. Where is the ignition coil and Ignition resistor located.

Thank you for all the help!
Nov 24, 2017 at 5:01 PM (Merged)
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DESTINY13
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I have a 1994 ford bronco 351 modified big block 184,000 miles It will start up fine and run for about 20 minutes then just dies as if someone shut off the key i try to start it back up and it wont but if you let it sit for a couple of hours it will start right back up and do the same thing. sometimes it will run for a day or two without any problems I have replaced the coil, coil wire, ignition module, and did fuel conditioner and losened the exhaust and none of those made any difference
Nov 24, 2017 at 5:01 PM (Merged)
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SPOOM
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My 1993 f-150 is doing the same thing, when I find out what is going on I will let you know
Nov 24, 2017 at 5:02 PM (Merged)
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CJ MEDEVAC
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ENGINE SIZE?

THE MEDIC
Nov 24, 2017 at 5:02 PM (Merged)
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BELENTHIAN
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its a 5.0L V8

Nov 24, 2017 at 5:02 PM (Merged)
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CJ MEDEVAC
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SORRY DOC

I WAS "REFRESHING" MY TABS

DIDN'T NOTICE YOU JUMPED IN UNDER ME!

DID YOU UNDERSTAND THE TRUCK THING, IN EMAIL? AFTER I RE-EXPLAINED?

THE MEDIC
Nov 24, 2017 at 5:02 PM (Merged)
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CJ MEDEVAC
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OK HAVE DIAGRAM

CRAMMED MAY NOT BE EZily READ...IF YOU WANT IT, LET ME KNOW, I CAN SAFELY GET IT TO YOU

NO LOCATION IS GIVEN HERE

HOWEVER (THIS MAY BE DIFFICULT) ON THE DIAGRAM, IT IS "RESISTORS" SLIGHTLY BELOW THE "10" AT THE TOP

THE "DK GREEN-YELLOW" WIRE AT THE COIL, SEEMS TO BE A DIRECT PATH TO IT---I DO NOT NOW HOW FAR YOU WILL HAVE TO FOLLOW IT!

THE MEDIC
Nov 24, 2017 at 5:02 PM (Merged)
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CJ MEDEVAC
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OOOOPS!!!


THE MEDIC
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Nov 24, 2017 at 5:02 PM (Merged)
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REALDEALNEAL
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Electrical problem
1994 Ford Bronco V8 Four Wheel Drive Automatic 187000 miles
----------------------------------------------------------------
The engine dies when I pull the headlight switch. I
replaced the switch, but that did not correct the issue.
I resently had the the intire dashdoard out to replace
the heater core. is it posssible that I have done some
thing to the wiring when I reassembled the dash?
Nov 24, 2017 at 5:02 PM (Merged)
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MERLIN2021
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You could have if all was good before the dash came out. Try the grounds...
Nov 24, 2017 at 5:02 PM (Merged)
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CJ MEDEVAC
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OOOPS AGAIN!!!!

THE MEDIC
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Nov 24, 2017 at 5:02 PM (Merged)
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BELENTHIAN
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Thats to small to read haha.
Nov 24, 2017 at 5:02 PM (Merged)
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CJ MEDEVAC
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ME AND DOC FINALLY FIGURED OUT, WE HAD TO CLICK ON 'EM TOO!

THE MEDIC
Nov 24, 2017 at 5:02 PM (Merged)
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BELENTHIAN
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So what do you think the problem is. I have tried everything I have thought the problem may be.

Thanks
Nov 24, 2017 at 5:02 PM (Merged)
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CJ MEDEVAC
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YOU ACTUALLY CHECKED THAT RESISTOR, THAT FAST?

THE MEDIC
Nov 24, 2017 at 5:02 PM (Merged)
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TROWEN7772
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Engine Mechanical problem
1993 Ford Bronco V8 Four Wheel Drive Automatic 180000 miles

on my 93 ford bronco 5.8l/351 it keeps stalling out when i take off from a stop and its also running really rough at an idol. It almost sounds like a vacuum leak or a sensor. dont know how to fix it can you help me
Nov 24, 2017 at 5:02 PM (Merged)
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MERLIN2021
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Check fuel pressure and fuel pressure regulator like this:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Nov 24, 2017 at 5:02 PM (Merged)
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BELENTHIAN
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where is the resistor located. I cant seem to find it
Nov 24, 2017 at 5:02 PM (Merged)
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CJ MEDEVAC
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BEST "I" CAN DO.....CARADIODOC MAY DO BETTER

REWIND TO MY ANSWER STARTING, "OK I HAVE THE DIAGRAM"

READ LAST LINE AGAIN!

I KNOW THIS MAY BE DIFFICULT. ESPECIALLY WHEN, ONCE YOU FIND IT....YOU MAY STILL BE LOST!

PROBABLY HAVE NOT GOT "MR. VOLTMETER" AVAILABLE?

IF YOU CAN FIND IT

MAYBE I CAN THROW YOU A SIMPLE TEST, THAT MAY POINT MORE...AT THE RESISTOR BEING BAD

DOC, I DO NOT KNOW WHAT THIS WILL DO TO THE ELECTRONICS ON THIS RIG

CAN I SHOW 'EM MY REAL JEEP PICS, OF BYPASSING DIRECT TO THE COIL???

OR IS THIS A BAD IDEA ON THIS ONE?

THE MEDIC
Nov 24, 2017 at 5:02 PM (Merged)