Ok everyone I have an 88 F 350 Dully with the EFI 460. I have replaced the fuel tanks and all 3 fuel pumps, Fuel pressure regulator, all injectors, map sensor, TPS, EGR Valve, EGR position sensor, EGR selonoid, intake air sensor, intake temp sensor, computer, Distributor, ignition module, all vacuum lines, radiator, water pump, heater core, battery, all cables, starter selonoid, ignition switsh, turn single switch, all tires, all new brakes, all hoses, steering gear box, thermostat and all relays. As you can see I am truly invested into this truck. So much so it may soon cause a divorce if I can't get this truck to go down the road.
it will start and idle, sometimes has a check engine light and other times not. It will be running fine and then for no apparent reason shut off. When I drive it, it will be running fine and then stall for no reason. It may or may not restart however when it does it falls on it's face. I can't fiqure out what I am missing. I am open to any advice or suggestions as I do not know what to try next.

 

Test your Ignition Control Module ICM. If OK then I would run Diagnostic Codes. If you need help on reading CEL flashes for reading your two digit codes, here is a video. Paperclip works in place of jumper

ICM Test https://easyautodiagnostics.com/ford...module-tests-1

 

have you pulled codes in the computer, and have you done a fuel pressure test on the truck? What shape are the vacuum control lines in?

I replaced the midships tank pump, and within 100 miles, I am having a bogging and stumbling issue on this tank. Fuel pressure under load is low at 20psi. Moral of this story, dont think just because you did something that the part didnt go belly up in record time..... the gauge will tell the tale for pressure, and codes will tell if you have other underlying issues besides. OBD1 systems are primitive by modern standards, but they can still point you in the right direction. The plastic vacuum lines are a disease all their own, if you havent checked and/or replaced them, check them good for cracks. The ones on my truck disintegrated with a stern look, I cant imagine yours are in much better shape.

 

Stop throwing the parts cannon at it, unless all those parts were motorcraft, they are subject to already being bad, still in the box, quality control is shameless, on anything but, motorcraft, Sandymane has thread around here, on what to look for, and ScottinAZ is right, I had fuel pump last 6 days, less that 36 miles

 

Ok I did the KOEO test and came upnwith two codes
63 and 34
will someone please let me know what I should be looking for.
I do not get the 111 code at the end it just repeats the two code pause then a 1 code the repeats the two codes again.
It appears to be running better this morning after doing the injector replacement yesterday.

 

as I read them, code 63 is a TPS signal too low and 34 refers to the EGR vacuum controls:
EVR – EVP sensor is/was high – EVR
PFE – PFE sensor is/was out of range – PFE
My listing shows both definitions for KOEO tests.


I would start with the TPS and go from there. The ECM not knowing or being able to interpret the throttle position will cause all kinds of chaos.

 

Thank you, will change that out and see what happens. Could old gas cause the other code or both codes? I let this truck sit over the winter waiting for better weather to get back at it.
The gas is about 6 months old that was in the tantheI really love this old truck however if I don't get it on the road again soon I may have to choose between her and the wife. I would really miss my wife! Lol

 

I dont think so, save for possibly not running right, causing low vacuum.

 

[QUOTE=InspectorJames;20334889]....................Thank you, will change that out and see what happens.

You don't need to just change it out. Diagnose the part and see if it is bad first. If you don't have a meter, get one it will pay for itself quickly with these old trucks. Also you can get a good book cheap at most auto parts stores or online. Haynes Manual for your year is a good starter for you.

How to test the TPS.

https://www.fullsizebronco.com/threa...stment.203080/


34 EVP - (R) EGR did not respond properly during test
EVR - (O, R, M) EVP sensor is/was high - EVR
PFE - (O, R, M) PFE sensor is/was out of range - PFE




How to test for code 34
https://web.archive.org/web/20110501...tion.com/?p=43

https://www.fullsizebronco.com/threa...cement.218407/

LIST OF FORD OBD 1 TWO DIGIT CODES
https://www.therangerstation.com/tec...gitcodes.shtml

 

Thank you, I will test both the TPS and EGR selonoid. Both are new items...I was not getting these codes until after I replaced the injectors. I double checked the plug and vacuum lines. All appear to be in good condition

 

Ok, replacing the TPS resolved the 63 code. I still have the 34 code but that I will get tested later today. Thentricknwas running great. Took it on a 20 mile drive and all was doing well when it fell on its face. Managed to get it back home and now I have a 95 code that indicates the fuel pump. It comes on and shuts down after about 3 seconds when you turn on the key so I assume it's not a constant run issue. The other two possible based on the code is bad ground or computer not receiving info on pin 8. I am going to pull down the rail pump and check the wiring. I do not see any additional grounds, only the two wire plug. Is there supposed to be any additional grounds?
another new issue is the starter selonoid. I have replaced it twice and now it will work only when it feels like it. Most times I have to cross it to start the truck. With the single wire disconnected the RPM rise about 500 to 1000. Is that supposed to do that? I was under the improssion that it was just a momentary voltage to pull the relay in to send power to the starter. Does this point to another issue? I still haven't given up on this truck.

 

Codes can show different possible causes depending on which test they appeared in. Memory works automatically after KOEO codes have been displayed. The top of the chart show the symbols of the test the code appears in. This chart shows better the difference in code meanings depending on when they displayed. Look at the definition of the code 95 for the KOEO test. This may be duplicate info but want to make sure you got it.

https://www.therangerstation.com/tec...gitcodes.shtml

 

I am very thankful for all of your assistance. If I am reading the chart correctly the 95 code for KOEO is bad ground to the pump. When I run the codes it dosen't come up in the first series of codes. AllI get is a 34 code. Then I get a pause, single flash a pause and then the next set of code. That is where I get a 34 code again followed by the 95 code. I assume that is the memory codes. It also shows either constant run or bad ground I believe. I am going to pull the rail pump and check the wiring. I was looking for a wiring diagram but they are hard to find a good one for this truck. Am I correct that the solid Black wire is ground and the wire with the strip is power?

 

34 EVP - (R) EGR did not respond properly during test
EVR - (O, R, M) EVP sensor is/was high - EVR
PFE - (O, R, M) PFE sensor is/was out of range - PFE

Here are three separate examples of different issue related to which code they appeared in.

R means code appeared it KOER test. O means code appeared in KOEO test. M means the code appeared in Memory. And this means the code was active at one time but is no longer active and is stored in memory.

I think the EVR code in Memory might be that the truck was not at operating temperature when you tested. I recently had a code 34 and it was a bad EVR. Here is how to test it. If it is good you can clear the code by hooking the system up again to run codes and while they are being displayed turn your reader off OR unplug your jumper. Run codes again to make sure memory cleared.

https://www.fullsizebronco.com/threa...cement.218407/

 

95 (O) Fuel pump: open, bad ground or always on - Power / Fuel Pump Circuits
(R) AIR not Diverting (AIRD) - Air Injection
(M) Possible bad fuel pump ground or open between fuel pump and pin 8 at PCM (Fuel Pump Monitor signal) - Power / Fuel Pump Circuits

If your 95 appeared in KOEO test, O is indicating what the PCM thinks
If it appeared in memory the M is indicating your possible issue