Register to remove these ads



Page 1 of 2 12 LastLast
Results 1 to 15 of 17

Thread: E4OD Issue - O/D Light flashing

  1. #1
    Registered User
    Join Date
    Jan 2009
    Location
    Wheeling, WV
    Posts
    8
    Thanks
    0
    Thanked 0 Times in 0 Posts

    question E4OD Issue - O/D Light flashing


    Here is a brief description of my most recent ambulance purchases:
    I have a 1994 E-350 ambulance w/7.3 IDI (along with the others). I bought it, the '92 ambulance, and a suposidly good spare engine and E4OD tranny for $850 in 2007. The ambulances, wich both run, have sat at the ambulace company since 2004. The '94 has only 30k on the rebuilt engine and tranny, while the '92 has 162k on the origional engine.

    I have finnaly been able to get the '94 ready to temporarily replace my ailing truck. I have changed all of the fluids, including the transmission fluid and filter. I drove the '94 on the highway for the first time the other day. (Keep in mind it has only been on the road for about a week since '04.) Everything was fine when I parked it, but when I started it back up again the O/D light was flashing steadily and the shifting was harsher than normal (indicating the tranny has increased presure). I do not know if this has anything to do with my problem, but my speedometer has always bounced all over the place. In an effort to fix that problem, I replaced the speed sensor in the rear end. It seemed to help the problem but not fix it (it now starts bouncing at 40 mph instead of 15). I have also replaced the TPS in an effort to fix my tranny problem with no results. Where do I go from here? Does the bouncing speedometer have something to do with my problem?

    Although not really related to my problem, I also replaced the stock tranny cooler and upgraded to 5/16" lines.
    1996 F-350; Powerstroke, 5-speed, 4x4, regular cab
    -daily driver
    1991 F-250, 7.3L IDI, 5-speed, 4x4, supercab
    -to be restored
    1988 E-350 Ambulance, van type, 7.3L IDI, C6
    -on the road (seasonally)
    1994 E-350 Ambulance, van type, 7.3L IDI, E4OD
    -Old beater
    1980 Mercedes Benz diesel, 240-D
    -parts car

  2. #2
    Senior Member discbrks's Avatar
    Join Date
    May 2006
    Location
    Columbus, GA
    Posts
    456
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Does the odometer work? I might be completely wrong here - but I'll say this. I had a loose connection on my odometer, which also works the speedometer. The harness came loose, causing the speedometer & odometer to quit... and so the trans. started shifting hard. Maybe the speedometer is the cause?
    1994 F-250 XL 2wd, green with tan interior, bucket seats (heated), added power windows & locks, Eddie Bauer overhead console, factory Alcoa-type wheels, Banks Trans-command, Banks Sidewinder Turbo, 4" straight pipe, backup lights mounted in rear bumper.

    1964 Ford Falcon 2-door hardtop, fuel-injected 302 (5.0) and a 5-speed. A blast to drive!

  3. #3
    Registered User
    Join Date
    Jan 2009
    Location
    Wheeling, WV
    Posts
    8
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    The odometer does work - I don't know how accurate it it, but I can't help but think the speedometer might have some connection with the tranny problem. As I mentioned, the problem didn't occur until I hit highway speeds then parked it.
    1996 F-350; Powerstroke, 5-speed, 4x4, regular cab
    -daily driver
    1991 F-250, 7.3L IDI, 5-speed, 4x4, supercab
    -to be restored
    1988 E-350 Ambulance, van type, 7.3L IDI, C6
    -on the road (seasonally)
    1994 E-350 Ambulance, van type, 7.3L IDI, E4OD
    -Old beater
    1980 Mercedes Benz diesel, 240-D
    -parts car

  4. #4
    Resident Fruitcake argve's Avatar
    Join Date
    Dec 2004
    Location
    Greenfield, Indiana
    Posts
    7,439
    Thanks
    3
    Thanked 118 Times in 74 Posts

    Default

    is the tach working correctly?
    Travis

    Enterprise 3 - 1986 Ford Std Cab F350 6.9 IDI Non Turbo C6 auto Custom Aluminum Rad and - The sports car model as I call em.

    Past diesels
    ENTERPRISE 2 - 1990 Ford F350 7.3IDI NA E4OD Crew Cab Dually
    1995 Dodge 2500 6 banger with 5 speed - too many things modified - was my hotrod
    1991 Ford F350 7.3 IDI the infamous "Enterprise" - too many things modified - caused many gray hairs
    1983 Ford F250 6.9 IDI Don't know why I bought it - used as parts
    Originally Posted by towcat talking about Dsl_Dog_Catcher
    admit it....
    you like that tingly feelings walking around the station with your skirt and heels with the weight of your sidearm on your hips........

  5. #5
    Full Access Member david85's Avatar
    Join Date
    Feb 2008
    Location
    Campbell River, B.C.
    Posts
    3,206
    Thanks
    1
    Thanked 4 Times in 4 Posts

    Default

    Does this year of van have a speedo cable? I know the F series changed over to pip signal for the speedometer in 1992, but not sure about the E series.

    I also second the question about the tach (if so equipped).
    1986 F250 Lariat turbo diesel
    3.08 gears, custom built up E4OD trans with baumann TCS and other mods. Also fitted a 1356 transfer case 20thou off the pistons, 30 thou off the bore, head studs, stainless steel exhaust, ram air intake, ATS 088 turbo with 60-1 compressor, moose pump

    1986 F150 2wd, 302 rollercam on LPG and 3.55 gears AOD trans (the one that never died)

    1996 saturn SL1 electric car project: http://www.diyelectriccar.com/forums...ion-26587.html
    - huh, it moves....
    http://www.youtube.com/watch?v=6HXB5KkBFNE

  6. #6
    Registered User
    Join Date
    Jan 2009
    Location
    Wheeling, WV
    Posts
    8
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    It has no tach - it's an econoline van. My latest idea is that there is a bad connection where the wiring harness plugs into the tranny. One of the terminals had a little corrosion, and the Ford book says that if one of the wires looses signal, it can result in the symptoms that it has. I'm going to look into that.

    It has no cable - like I said I replaced the sensor on the rear end.

    This is why automatic transmissions and electronics (even worse - the combination of both) are bad!
    1996 F-350; Powerstroke, 5-speed, 4x4, regular cab
    -daily driver
    1991 F-250, 7.3L IDI, 5-speed, 4x4, supercab
    -to be restored
    1988 E-350 Ambulance, van type, 7.3L IDI, C6
    -on the road (seasonally)
    1994 E-350 Ambulance, van type, 7.3L IDI, E4OD
    -Old beater
    1980 Mercedes Benz diesel, 240-D
    -parts car

  7. #7
    Full Access Member david85's Avatar
    Join Date
    Feb 2008
    Location
    Campbell River, B.C.
    Posts
    3,206
    Thanks
    1
    Thanked 4 Times in 4 Posts

    Default

    Loose connections anywhere in the wiring will cause problems. But you are right about the connection on the side of the transmission (passenger side one that feeds the solenoid body). Its a very common problem.
    1986 F250 Lariat turbo diesel
    3.08 gears, custom built up E4OD trans with baumann TCS and other mods. Also fitted a 1356 transfer case 20thou off the pistons, 30 thou off the bore, head studs, stainless steel exhaust, ram air intake, ATS 088 turbo with 60-1 compressor, moose pump

    1986 F150 2wd, 302 rollercam on LPG and 3.55 gears AOD trans (the one that never died)

    1996 saturn SL1 electric car project: http://www.diyelectriccar.com/forums...ion-26587.html
    - huh, it moves....
    http://www.youtube.com/watch?v=6HXB5KkBFNE

  8. #8
    Full Access Member jdchristian3's Avatar
    Join Date
    Mar 2007
    Location
    shenandoah valley of VA
    Posts
    68
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    have it towed to a trans shop. DONT drive it. when the OD light flashes you have major issues. if driven, it could cause failure. it needs to be scanned and logged while driving, so all sensors are watched.
    04 f-350 4x4 6.0L 6 speed DRW-bone stock except no muffler, CM flatbed
    94 f-250 4x4 7.3LIDI factory turbo E40D- fuel turned up 25%, FW Murphy dual meter gauge pyrometer, custom intake and AEM dryflow filter, single hand made black stack, trans-go shift correction kit, 3.73LS rear, 235/85R16 BFG M/T KM's. Out runs every thing else i own...
    74 Jeep CJ-5 renegade factory v-8-out of service due to body being rusted thru at all mounts...
    99 f-350 4x4 SRW 7.3L E4OD-Egde Juice/Attitude, gutted cat, K&N intake and filter, KURT gooseneck hitch, battle scarred from cows, gates, and horses...

  9. #9
    Registered User
    Join Date
    Jan 2009
    Location
    Wheeling, WV
    Posts
    8
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    I have not driven it since, but my Ford service manual says that a flashing O/D light is caused due to the following "condition:"

    [INDENT]"Voltage through EPC circuit is checked and compared after a time delay. An error will be noted if tolerance is exceeded during KOEO and continuous Self-Test." --- It says this is caused by an "EPC circut failure or shorted output driver."

    This is the only thing in the book I could find out about a blinking O/D light. Do you know of the more serious conditions that would cause the light to blink?
    1996 F-350; Powerstroke, 5-speed, 4x4, regular cab
    -daily driver
    1991 F-250, 7.3L IDI, 5-speed, 4x4, supercab
    -to be restored
    1988 E-350 Ambulance, van type, 7.3L IDI, C6
    -on the road (seasonally)
    1994 E-350 Ambulance, van type, 7.3L IDI, E4OD
    -Old beater
    1980 Mercedes Benz diesel, 240-D
    -parts car

  10. #10
    Yeah, it's a CHEVY! GenLightening's Avatar
    Join Date
    Oct 2006
    Location
    Pukalani, Hawaii
    Posts
    1,917
    Thanks
    18
    Thanked 21 Times in 17 Posts

    Default

    You need to pull the codes from the tranny. Also, even though you don't have a tach, you should still have the sensor for it, as the computer needs that signal to work. You might check the connector for it. It sits to the right of the oil fill tube, a large nut with 2 wires coming out of it. Also check the connections at the trans, both sides. If none of that works, you may need to open the rearend up to check the signal ring for the speedo.
    Doug

    '88 Chevy 1Ton CC DRW 2wd
    6.9 IH IDI w/Banks Sidewinder
    Rodney Red custom radiator
    E4OD w/Baumann controller and Racer-X triple disc TC

  11. #11
    Full Access Member
    Join Date
    Mar 2008
    Location
    my very own hell
    Posts
    5,143
    Thanks
    34
    Thanked 242 Times in 202 Posts

    Default

    Quote Originally Posted by jdchristian3 View Post
    have it towed to a trans shop. DONT drive it. when the OD light flashes you have major issues. if driven, it could cause failure. it needs to be scanned and logged while driving, so all sensors are watched.
    Eh, it depends - flashing OD light means the PCM has entered limp mode, which usually means 2nd gear and full line pressure. If trans ain't slipping and fluid don't smell and/or look burned up chances are tis electrical issue, in which case the trans will not get damaged if driven. His wallet will definitely take a serious damage if he has the truck towed to a trans shop tho, it seems there are very few honest mechanics left out there so he'll likely get slapped with at least an hour's worth of work even if it takes them just 5 minutes to located a loose harness or plug and fix it. I'm a firm believer that shops are for people who don't have the equipment/tools for the job, don't know have the knowledge/skills to perform the job, or are just too darn lazy to even be bothered with diagnostics let alone performing any repair...
    _/「,[____],
    l----L -0lll0-
    ()_)-()_)-O-)_)

  12. #12
    Registered User
    Join Date
    Jan 2009
    Location
    Wheeling, WV
    Posts
    8
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    Don't worry - it won't be going to any tranny shop - besides, I have a spare tranny anyhow (I just hope its good and I hope I won't need it). I will try to have my dad pull the codes on Wed, which should get things narrowed down.

    I'm still not sure why the spedo isn't working properly after replacing the speed sensor - will check the signal ring.
    1996 F-350; Powerstroke, 5-speed, 4x4, regular cab
    -daily driver
    1991 F-250, 7.3L IDI, 5-speed, 4x4, supercab
    -to be restored
    1988 E-350 Ambulance, van type, 7.3L IDI, C6
    -on the road (seasonally)
    1994 E-350 Ambulance, van type, 7.3L IDI, E4OD
    -Old beater
    1980 Mercedes Benz diesel, 240-D
    -parts car

  13. #13
    Full Access Member david85's Avatar
    Join Date
    Feb 2008
    Location
    Campbell River, B.C.
    Posts
    3,206
    Thanks
    1
    Thanked 4 Times in 4 Posts

    Default

    Also follow the wiring harness back from the VSS connector. Some have reported damaged wires that can cause problems like you are having.
    1986 F250 Lariat turbo diesel
    3.08 gears, custom built up E4OD trans with baumann TCS and other mods. Also fitted a 1356 transfer case 20thou off the pistons, 30 thou off the bore, head studs, stainless steel exhaust, ram air intake, ATS 088 turbo with 60-1 compressor, moose pump

    1986 F150 2wd, 302 rollercam on LPG and 3.55 gears AOD trans (the one that never died)

    1996 saturn SL1 electric car project: http://www.diyelectriccar.com/forums...ion-26587.html
    - huh, it moves....
    http://www.youtube.com/watch?v=6HXB5KkBFNE

  14. #14
    WAR DAMN EAGLE! tuckerd1's Avatar
    Join Date
    Mar 2005
    Location
    Princeton, AL
    Posts
    903
    Thanks
    3
    Thanked 0 Times in 0 Posts

    Default

    Flashing OD light can mean several things. I'm no expert so I won't try to list them. But my 93 has had the flashing light many times since it was new. Every time but once it was a slipped Torq Conv code. Once it was for a TPS gone bad. I would usually disconnect the batteries and see if the bad code cleared. It did until I finally rebuilt it at 187,000 miles.

    If it shifts through all gears, even though hard, disconnect the batteries to clear the bad code and try it again. If flashing light comes back, get a code reader. You can get a code reader for ~$40.
    Don

    Cotton - '93 F350 CC DRW 7.3, Hi-Mod E40D, 2WD 4.10, Hypermax Turbo, Intercooler and 3 1/2" exhaust, DPS Turbo Cal Pump, Delphi BB Injectors, Holley Red, F450 Hydroboost & MC, E40D has latest internal updates and low stall billet convertor.

    2010 Dodge Ram 3500HD 6.7L CTD Auto Exhaust Brake 4x4 CC DRW B&W Turnover Ball

    2012 Bison Stratus GN 42' 4H 16' LQ

    2002 Pacesetter GN 36' 4H 12' LQ

    2000 Merhow Equistar GN 24' 2H 5' LQ


    '99 Damon Challenger 31RL 5'er, 5.5G Generac

    WAR DAMN EAGLE!!!

  15. #15
    Registered User
    Join Date
    Jan 2009
    Location
    Wheeling, WV
    Posts
    8
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default So far - So good

    I disconected the batteries like you suggested, and so far... so good. I took it for a nice long test drive, and the light never came back on and shifting is back to normal, so I'm hoping that the TPS that I replaced was the problem. My speedo is still going crazy, however.
    1996 F-350; Powerstroke, 5-speed, 4x4, regular cab
    -daily driver
    1991 F-250, 7.3L IDI, 5-speed, 4x4, supercab
    -to be restored
    1988 E-350 Ambulance, van type, 7.3L IDI, C6
    -on the road (seasonally)
    1994 E-350 Ambulance, van type, 7.3L IDI, E4OD
    -Old beater
    1980 Mercedes Benz diesel, 240-D
    -parts car

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •