1984-1994 Ford Self Diagnostics Test - KOER ( Key On Engine Running )
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- Опубликовано: 28 авг 2024
- How to perform a key on engine running ( koer ) test on Ford vehicles with the EEC-IV engine management efi system. The video is a Taurus SHO but the same procedure should work on the 1984 through 1994 Ranger, Mustang, F150, Thunderbird, etc. This test examines the car or trucks engine's various sensors while running, and reports any trouble codes via the check engine light. Doesn't require a scanner, just a paperclip!
I recently bought an Equus Innova OBD-1 code reader, and the users' manual emphatically states that before you run this KOER (key on, engine running) test, you must first run the KOEO (key on, engine off) test and fix any trouble codes you get from that test. For the KOER results to be valid, you must be getting a "system pass" code (11 or 111) from the KOEO test first. By the way, that code reader makes this job MUCH easier. For under $25 on Amazon, the Innova 3145 Ford Code Reader for older Fords (1981-1995) is a great buy. The manual has all the Ford OBD-1 trouble codes and their meaning (the most comprehensive list I've seen) as well as detailed instructions for running all the tests. If you own an older Ford car or truck, this code reader and its manual are well worth the small investment.
You were supposed to turn the wheel left ..right step on brake ..step on gas clap your hands three times throw your hat into the air .. and yell Yeeehaaa.. Great video ..Thank you for all info
This makes you appreciate the OBE2 system so much more.
Awesome job! I'm having acceleration problems with my daughter's 1992 Thunderbird. Can't wait to get out there and test it. Thanks for the informative video.
Thanks man I remember my dad doing this when I was a kid, but now days nobody knows what I'm talking about or how to do it. I drive a 1990 f-150 so this was a really big help. Thank you again.
Man ten years ago nobody knew? No wonder everyone’s so confused when I’m asking questions
Thanks! The codes are always helpful to point you in the right direction for figuring out whats wrong.
very helpful as I could not find a manual for this 14 yr old car, I am a retired wrench. GOOD job thank you!
+John Clarke Glad to help out!
Yes! I love Ford for this! My car has been having rough idle for weeks now. Just got to do this and see what codes my 94 explore gives me.
Great video helped a lot. Thanks
I have a 93 ford explorer and it has the same features as this car on the video. I had trouble trying to figure out what the hell is going on and i was scared thinking I'll probably never know what to do now. Seeing this video now I am relieved that I can do this at home without taking it to a mechanic who may probably do the exact same thing!
Awesome video man thanks very much. I ran this test on my 94 Bronco today and got the 111 code. All good!
Very neat technique, thanks a lot!
Code 33 is the EGR valve. If you get oxygen sensor rich or lean codes, replace the MAP sensor. If you get vacuum to the EGR at idle, replace the charcoal canister purge valve.
Thank you for this video you just helped me get my check engine light fixed on my 91 and 93 sho
Best description I have come across. Thnks. Will now try on 95 e150 econoline. Garage wanted $100 to use their OBD1
Thank you so much for the video!! I have been trying to figure out why my 1990 t-bird was running super rich.
Amazing, specially for me in Brazil and it seems nobody understand NOTHING about Mustang in my town. Thanks. I am going to Florida next week, tomorrow I will know the errors code. Tanks again.
I'm glad this video helped you, thanks for the comment.
Thank you for the clear explanation of the process. Well done! Where on yhe not did, you find the code answers. When searched, I came up with long lists and started with P some 5 figures
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Excellent Video! Working on my father in laws truck. This worked great to give me the codes I needed to explore. Thank you!
Thanks for your info on self testing a ford computer, I have been a Ford man for years and never knew this could be done. Thank you. Will have to try it on my 1990 Bronco and see if it spits out any codes, no check engine light but it idles rough and will stall but other times runs perfectly.
emdman1959 glad to help out, thanks!
Check the EGR and charcoal canister purge valve. Run fuel injector cleaner thru the engine to clean injectors and eliminate false codes.
Holy crap, I was just about to say that I used to do this on my 93 SHO, and imagine my surprise when the video started!
Thanks for your help. You saved me $30 already.
Penny Bevins Glad to help you save some $$
Also found video very informative and the guy didn't irritate me, like 95% of RUclips videos do.
Get a digital code tester from Amazon for Ford. Also get the extension cable. Better than that get a Snap-on scanner and cartridges and manuals and adapters from E-Bay. Also get the 120 volt adapter and Battery Pak to check test results away from the car. Get the latest cartridges.
Thanks for the info. You explained it better than most i have seen. looks like you may have done this a few times.
glad to help, thanks!
Get a Actron CP9690 code tester. It checks live, record, graphing, oxygen sensor test, emissions readiness test, transmission codes, solenoid and relay test, memory codes, MAP sensor test, MAF test, IAC valve test, and MORE! It works on 1983-2013 and is updatable. EBAY has it.
Making a small jumper wire with male spade end connectors on both ends will fit better than paper clips. Also, I am wondering just how many people watching this video are likely to end up shorting the jumper to ground because nobody mentioned to not lay the bare, uninsulated paper clip near anything metal. Also, is that whole turning the wheel, braking, then rev really necessary? I don't have to do any of that stuff to get codes from a 91 F-250 with 351w block, but the connector and codes look the same. I only found this video while checking for a friend to see if Taurus were similar.
@@hankbridges5055 , is that only on certain years or models? Because if I start to turn the wheel or anything else, then my truck is already flashing codes before I even get to the second step, and can't count codes, write them down, and steer at the same time.
@@JamesMorningstar Yes, evidently. Some cars have a power-steering pressure switch and a brake on- off switch. It's to test the operation of those parts. My car says to but it don't have those parts. Some cars have a over-ride switch to activate. Best thing to do is do like it says or it might not test. My Actron CP9690 tester has code-connect to diagnose codes. My Snap on scanner is more for OBDI. It has troubleshooting. I have OBDII cartridges to 2000 and the adaptor. The Actron only gives OBDI test results for my car. It DID specify which air pump check valve was bad. Code-connect helped me to fix 2 problems. It's more specific.
He was supposed to turn the wheel 360° left or right and then back to center and push the brake pedal. Check fuel pressure and leakdown. O2 codes can be spark plugs, clogged injectors, etc. EGR not opening can be a bad EGR or no vacuum to the EGR. Improper vacuum can be the charcoal canister purge valve. Rich mixtures can be the MAP sensor or CTS, or leaking injectors, or other things.
saweeet... you da man, juss bought a 91 ford f150 ... no engine light on it, but this is good too know.. explained flawlessly on your part (Y)
Will the same procedure work on 1998 f150 4.6 L.
great video & information. best i've seen yet. thanks for posting.
and you'd think ford would put in the manual how to do this eec test, instead of telling you to "get your vehicle serviced right away."
Fantastic! thanx... my 1990 f150 is needing this... thanx
Can I still run this test with it off? Cause I cant turn it over
nice video man, very thorough. Much appreciative.
Thanks for the video tutorial. My 1994 Ford Ranger thanks you too.
What's test do if there are no codes. It flash a pass code. Thanks for sweet video
Tried this on a 1995 Ford Escort LX, 1.9L. Got check engine light flashes while engine off but with engine running.... nothing.
My Lincoln Town Car cranks well with new battery but won't fire up. So the war up and motor running is not possible. I was told and have read that this test can be done with only ignition key turns on and the engine need not be running. Also the OBD1 test is for through 1995 and OBD2 is for 1996 and newer.
Nice swap man. Bet that SHO motor really hauls in that little car.
I just tried this on my 94 F150 (manual transmission) and the check engine light never came on :( Do you know if there's anything different or why this test wouldn't work?
Does the CEL illuminate during KOEO? That means, turn key to on/run but dont start the vehicle! Checm engine light should be on. If it doesnt light up, its most likely a CEL bulb that burned out, common on older vehicles that have been ran with a fault code for extended periods of time.
you got a video for chevys... this helps out alot for me thanks a bunch!!!!!!!!!!!!!
Great explanation! Well spoken. Thanks!
IMO the Chrysler procedure for checking codes is simpler than Ford's. I own a '94 Jeep Grand Cherokee and you just have to turn the ignition switch from OFF to ON five times and then just keep it in ON the fifth time around, THEN count the number of times the 'Check Engine' light flashes. (:
yes but chrysler doesn't give an engine running test, ford gives you separate engine running/not running tests that give you better info.
@@marzsit9833 This was before OBD-II, digital odometers, etc.
10th Viewer 3rd Like Thank You for the time you spent on this Video! Chevrolet can be checked in much the same way!
I have a 1986 mercury cougar 3.8L with an digital dash display and it did not work. There is no check engine on this cluster just a servive light that never flashed. I tried several times making sure i had the right ports and cleaned them out even to no avail. Guess i may have to get myself an OBD-1 system reader.
EEC-IV...
Old as dirt, but keeps on chuggin!
Yup, no idrive, variable displacement or gps, but it can fire the injectors, and throw a spark!
Seeing as they didn’t have OBD yet in 1984, I’m gonna call a bit of an error in your date stamp there. Otherwise, helpful!
It is not a Running test! Rather a Coad Reader! You Jump the 2 terminals, and turn the Key On, the Check Engin Light Flashes in A Morris Code, Long and Short Blinks Check the Chart etc.
Thanks! Very helpful!
thanks, glad it was helpful for you.
My code book said *Muffler Bearing Bad & Low Blinker Fluid* where are these located at?
By the Water pump relay & The exhaust pump reservoir
Wen i press the brake my head tilts forward.....those that mean check glove box lock for sugar residue from the freon
thanks i will be doing this tomorrow morning.
Does it have to be a genuine Ford paperclip ?? : )
I accidentally used to a Chevy paper clip and the car burst into flames.
Eli W Oh NO! You used a Chevy clip for a Ford? They should make them different to avoid that!
Marty Stevens I tried a a Ford paperclip and it broke halfway through the test. F.o.r.d (fix or repair daily) haha.
did you wipe the dog shit off the Chevy paperclip first?
Exactly what I needed big thanks
happy to help out!
hello - 1987 ford ltd crown victoria lx 5.0 v8 OHV- i just tried this following your directions to the tee, however, it did not work. the engine light never alerted 🤷♂🤔, any idea?
J G, will this work on a 1995 taurus 3.0 eec? i thought 95 was the transition year.
so formal compared to recent vids xD
Unplug the mass air flow sensor, and start the engine. if it stays running, the mass air flow sensor is bad.
Hello. I have a 1994 automatic ford ranger with a surge problem. It only happens after its warm and at a complete stop. It wont do it on park or neutral. It also takes long to start. Sometimes i have to turn ignition key twice. It started to surge right after the smog guy replaced the fuel neck that goes to gas tank. Replaced IAC valve, fuel filter, sparkplugs, temp sensor, egr valve , pcv valve, cleaned MAF , cleaned throttle plate, checked for vaccum leaks. Any good advice would be appreciated.
thanks for this, one question though my 86 thunderbird's engine light flashed 6 times and i have a 8 cylinder engine?
Can I do this whith my 93' escort and 1.9 engine?
Cool, I can't wait to try this on my new 1994 F250.
Hi Jennies Garage. Where can I find the documentation you read the flashes from? Nice little trick....thanks.
thank you for this, you saved me a lot of money.
Awesome tutorial, thank you
I have a 92 Lincoln Town Car. Do you think this test will work on Lincolns as well? It’s a 4.6 V8
My car is with the ABS and AIRBAG turned on. How can I turn it off? The car was stopped by one year, bateryless a lot of time.
Did you solve the problem?
Where do I find a crankcase sensor for a SHO 3.2???
how many digit codes would it be for an 84 f150?
2
Does this work on a carbed eec iv? Has no CEL, but an Emmisions light that turns on and shuts off after the engine is started. Working on an 85 ranger 2.8.
Help! now my truck wont stop running through the procedure even after the paperclip is taken out!
Do Ford diesels of the same years have this feature too?
So what did you end up doing to get rid of the codes?
Hi! This was extremely helpful. Does this method work on and 89 sable? My car was driving great on our way to a restaurant. When we left the car started fine but wouldn't go into drive or reverse? Appears to shift but doesn't go?
Get an Action CP9690 code tester. It has graphing and live data and MORE!
7/14/2022...fascinating. I have purchased a 93' Tempo, that was in a minor flood in Ohio. This is my 1st experience with a non carburated motor of which i have zero use for. This short video will help me , hopefully pass communist Oregons screw the motorist D.E.Q. test.
You said to turn right then left which you did the first time but the second time you turned left then right. I'm guessing it doesn't matter which way you turn first as long as you turn both directions?
Crazy question I do remember the paperclip trick from back in the day from my dad but I have a 93 Ford Mustang 2.3l lx that shot a code ten at me and the other day I was noticing the engine running poorly/having a possible misfire while hitting 65 on the interstate. I know a code ten is a cylinder 1 issue but would the best course of action before taking it to a more skilled mechanic be doing a full tune up then giving it another go?
I have a 1993 Ford f250 7.5 liter truck I'm going thru three to four quarts every 400, 500 miles I'm not leaking under my truck or smell it burning on my motor I have black sewt coating exhaust and blowing out any ideas its using more and more oil every day I'm trying tutu figure it out and fix it (12 quarts in 9 days)
Great video. Question: you've noted that this works for 1984-1994 Ford Vehicles. Will it also work for 1995 ones as well? I thought 1995 was the last year for OBD1. (I believe it wasn't until 1996 that Ford went to OBD2.) Thanks!
shockteevee yes 95 as well
Would this work on a '93 Ford Escort GT with the Mazda 1.8 4 cyl engine?
Please please HELP ... I can't figure the actual codes out I counted the flashes but can't determine wtf the individual codes are. It's a 93 f250xl 5.8L currently won't start or will and sounds like crap and dies instantly numbers I got are from KOEO are 636114334636114334117223454542628172334542628 (I have recording of codes if I could send it to you it might help?)
Help 87 svo. Wont flash any codes got it hooked up same way
Do they make a scanner for a 1991 Sable?
Hey john, why would you want to do the KOER test and not do the key off test? Or I guess you should do both right? Can you explain why you should or shouldn't do both tests?
Brig T You should do both. First tend to the first codes first in case it corrects others. After replacing parts, recheck. Code 33 is EGR valve.
so i tried it and the code was 4141 but when i took out the paperclip it zapped/shocked and the truck died. it wont stay running longer than 5 seconds. its a v-6 2.9. what could it be?
Excellent 👌
what if your engine light don't come on till you drive for a while then goes off when you cut it off and doesn't come back on till you drive it for a while again. Can you still run this same kind of test?
I hate doing this, and know it a little to good! SHO owners know where I'm coming from.
superbly explained thanks ..
What about 1995? (Ford Taurus specifically)
Hi I have a 1994 Mercury Sable 3.8L (same as a Ford Taurus) ..I went to go run this test but I could not find the gray single connector, it's not attached to the black plug, Any clue what may be the problem? Please help. Thanks
Hi, The single plug should be in the same area as the large one. Just hunt around and you should be able to find it. I have read that in some rare instances the single connector is integrated into the large one. Search google for a diagram of the large plug. If you have an extra terminal it might be the sti wire.
How is the computer getting feedback from steering right/left in this? I can see brake and throttle able to be sensed by the system but steering right/left I am at a loss as to how the car knows your doing this?
It's for the load.. power steering load on engine... brake for vacuum change.. rev for missfire
the engine turns over but wont start its go the check engine light will this still work?
Thank you for this great video.Can you please provide the link to the codes? I have 1992 Mercury Cougar 8 Cyl.(same as 92 T bird). Thank sagain
Great info, thanks for sharing.
glad to help, thanks.
Awesome video! Thank you so much. Where to check codes tho? My ford probe 89 gave me 98 and 54.
Would a $15 ODB1 scanner do the same ?
will this work on a merc cougar 89 xr7?
What did type into google specifically like what exactly do you ask google ??
Great video. I have a 93 f150. 4.9L. I have to codes. 998 and 118. I replaced the tps and put back the original bulds on instrument panel. I disconnected the battery for about and hour and even over night but the check engine light came back on. With same codes. My question is how do I reset the computer. Please help.
7/30/2022 !!! Update from 7/14/2022.....SUCCESS !!!! The codes mean Zero to me as i have never & will never take a car to a mechanic. The turn the wheel, JAB the breake pedal HARD , and rev the engine 100% shut the check engine light OFF, and allowed me to pass Oregons ripp of democrat scum emissions test. And this video is HOW OLD ?? Fantastic. engine sevice light has been on for 2 yrs.
I tried this on my 86 ranger, engine seemed to go through the test paces , didn't get any flashes, could my engine light be burnt out?
When you first start the car or turn key to accessories, does the check engine light come on for a moment? If it does, then the light is fine.