Dies in Reverse and lowest forward gear

[TennesseeBroncBoy]

Recently I have had some trouble with my 1993 5.8L EB 351W, w/E40D. I go out to crank the truck up and let it warm up a little while. I shift into reverse to back out of the driveway, and it wants to die on me. If I don't immediately give it gas, it will **** over. Once in gear and left alone with no throttle input, the rpms fluctuate between 1,000 and 500, then it dies. I can put it in any forward gear with no problem, but if I try to put it in the lowest of the forward gears it dies immediately, even when you try to give it gas. Idle is set fine. I searched for a answer and read on a Mercedes forum that the MAF might cause this problem, but the MAF on Bronco's did not come out until the 94 models. My truck has the speed density, which I have no idea how it functions. ALSO, about 1,000 miles prior, I had my ECM (Engine Control Module) replaced. I don't know if this would affect it either. I really don't know where to start looking to fix this, since it only happens in reverse and forward low, regardless of temperature or precipitation. I am pretty sure it is not a load thing, or a wiring thing. I hear no tranny noise either, the rpms just dive and then it's dead. Please help if you know what might be causing this. Thanks guys! :wacko:

 

[miesk5]

yo!

I suggest having the Bronco checked for Diagnstic Trouble Codes (DTCs) for Free at a local parts shop;

Have all lights & Accessories Off.

Be sure that they do the KOEO = Key On Engine Off portion first;

then, engine @ Normal Operating Temperature before doing the KEY ON ENGINE RUNNING (KOER) portion

or DIY;

Self Test by BroncoJoe19

Post any DTCs found here and then we'll see what other tests are involved

Is the Transmission Control Indicator Lamp (TCIL - LED @ end of shofter stalk) Flashing?

A possibilty is;

Kills Engine in Drive or Reverse; may be caused by a faulty VSS signal to the PCM. Observe the speedometer gauge or VSS signal on a scan tool. If the VSS display exceeds 90 MPH (may be higher on some models), the computer is programmed to stop pulsing the fuel injection. If this occurs at low speed or while idling, suspect a bad Speedometer Odometer Module. Source: by jasperengines.com

 

[andre]

was the ecm exact part no#

if youre ecm come from stadard tranmission may be you're problem e

because auto tranms ecm set idle when you shift in drive or reverse

fist thing to check

if you have old ecm and one in truck post the two part no#

ecm can have diff fontion ac or not auto manuel ext,,,ext

 

[Seabronc]

Andre has a good point there. The idle setting for a manual transmission is much lower than for an automatic transmission.

Good luck,

>-

 

[TennesseeBroncBoy]

Also swapped out a PCM relay too b/c it was burnt up. (P/N- FOAZ 14N089A). But as you were asking the P/N for the ECM here it is: 78-5281. Best I know this is set for the 5.8L w/ E40D AT. I have not had a chance to get the codes. I am a military guy, and with all the Haiti business, I've been too busy to get the beast down to the parts store and the codes checked. I will write down, verbatim, exactly what you suggested and have it tested in that order. I will post the info as soon as I get it. I really appreciate the help. This is a really frustrating issue. Good news is that the truck is still driveable. /emoticons/[email protected] 2x" width="20" height="20" />

 

[miesk5]

yo;

One way to cofirm a Ford ECM (PCM, etc.) is to check your Vehicle Emission Control Information (VECI) Decal, same as the one on the core support or hood or air filter cover

It is On-Line for Free at Ford. Click "Quick Guides" in left panel; Scroll to & CLICK VECI Labels "Provides Vehicle Emission Control Information (VECI) and a related calibration parts list."

Enter applicable info (need to know your Calibration number from your B-pillar sticker).

btw, Vacuum Diagram is the same as the one on the core support or hood or air filter cover.

Source: by Ford motorcraftservice.com

Didn't see that PN for a quickie view of 2 Cal numbers there

a Google Search gt this;

1993 FORD BRONCO Engine Control Computers also known as (ECC / ECM / PCM / Module / etc.) 78-5281 V8 5.8 GAS Engine Control Computer] Reman. w/A.T. Federal Emissions (E4OD) Transmission; w/I.D. #F2TF-CC

I have to ASSume (I am da ass most of da time) that it is correct; most of the time that VECI & CAL # are the factors as well as the EECs Program Code

as Ryan writes;"...Every computer has a main sticker on the 60-pin connector that identifies the computer and holds the most information about the computer. If you have an EEC in your hands and wonder what it came out of this list is for you. If you are looking for an EEC in a junkyard or swap meets this is for you too. If you just wondered what computers Ford used in which vehicle this is also for you. I would not be upset if you printed this page off for your records, in fact I recommend taking it with you so you have an advantage finding that special EEC..." see site for Label pics & Listing

you can check for codes yourself; See the Link there for Joe's DIY info

But I hear ya about how busy (when isn't it in da MIL? but this is devestation & **** in Haiti) it is now; good luck to you and stay safe!

 

[TennesseeBroncBoy]

Much to my surprise, the codes pulled were all tranny codes. 617 (Shifting between 1-2), 619 (Shifting between 3-4), 628 (Excessive Torque Converter CLutch SLipage), and 637(High Trans Oil Temp). I took it to a reputable/experienced tranny shop in Pensacola (Hirst) and they did some tests on it and drove it and said that there was slippage in the torque converter for sure. He could not duplicate the dying in reverse problem though. I can't remember his exact words, but he said that it could be getting hot and locking up. His dad (the owner) said that the reverse thing is usually a pump issue. For a rebuild I'm looking at a $1700-$2500 repair bill. Almost more than the truck is worth. /emoticons/[email protected] 2x" width="20" height="20" /> I know a tranny rebuild is well beyond my knowledge, so it looks like my beloved Bronco might be a driveway ornament for a while. Thanks for the help and the jumper advice. Time to marinate on my choices. Once again, many thanks!

 

[miesk5]

I hear ya... Yep, the tranny is the tuffest on the $ sit.

I know some who have a nice garage and have the time & $ for parts and tool rentals & did the repairs.

I was under my 96 the other night in the driveway and really, I hesitate to advise some DIY repairs to others bec. of the lack of a garge, jacks stand lifts and the special expensive tools needed to do some repairs.

And as with us now, the Bronco is our our sole vehicle..

Anyway; a quickie;

DTC 617 - 1-2 shift error. "...IF this code persists and you have noticed shift problems while driving, its going to be a shift servo inside the E4OD tha has failed. (Computer needs to control when the tranny is shifting)..."

Source: by greystreak92 (Joe B)

619 (M) Transmission shift failure (3/4 shift)

DTC 628; "...code 628 can be caused by a mechanical problem or electrical problem. First thing to do is to check power to the solenoid connector at the transmission. These solenoids are 12 volt solenoids, not 5 volts......I have attached a few pictures for reference. Unplug the transmission connector and check the VPWR wire for 12 volts first with the key on at the harness itself. Then if OK, check the solenoid resistance with an OHM meter on the 200 OHM scale through the pin on the connector coming out of the transmission marked TCC & VPWR pins. Should be 0.98 to 1.6 OHMS as MTB has said. I usually used a special transmission tester tool, but this is the only way you can do it. I have seen many of these code 628 in the past, and I'm sorry to say 95% have been internal Mechanical failure. These tests for the solenoids are only going to tell you if the solenoid is open or within spec. It will not tell you if a piece of junk is stuck in the solenoid causing it to bleed pressure to the TCC, therefore giving you a rough running engine, shuddering feeling or stall in 2nd, 3rd, or 4th gear caused by the Torque converter clutch being applied at the wrong time..."

Source: by Fordace I think that was on a Lincoln w/E4OD and don't know id the pins are the same,, but..

GL with it.. hang in there

 

[Goorange]

I am having the same problem with my 91 F150 with the 302. It dies in revers and sometimes when I pull in to a parking lot or something it will die too. Recently the motor started racing to 2500 rpms unless you unplug the TPS. I know have to replace the TPS and this is not the first time I have had to do this with an F150. A diagnostic should return that code though if you have it run