Code help needed
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Junior User
Joined: May 2006
Posts: 55
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From: Finland,Europe
Code help needed
Hi guys,my 1989 4,9l+5 speed F150 keeps flashing its engine light while driving and when i scanned it i got these codes:
KOEO 27,10,32,96
KOER 10,77
code 27: Coil #2 primary circuit failure
code 32: EGR PRESSURE FEEDBACK FAULT (1985-1989 MODELS)
code 96: Fuel pump secondary circuit failure/high speed fuel pump relay open
code 77: Operator error during dynamic response test/wide open throttle not sensed
What should i do? I´ve never done this before.
Tommi
KOEO 27,10,32,96
KOER 10,77
code 27: Coil #2 primary circuit failure
code 32: EGR PRESSURE FEEDBACK FAULT (1985-1989 MODELS)
code 96: Fuel pump secondary circuit failure/high speed fuel pump relay open
code 77: Operator error during dynamic response test/wide open throttle not sensed
What should i do? I´ve never done this before.
Tommi
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
There are no such codes 10 or 27 for your truck to start with.
32 says you have an open wire going to the EVP sensor.
96 says the fuel pump relay did not pink but you say you are driving it.
77 says you did not put your foot on the skinny pedal during the test.
32 says you have an open wire going to the EVP sensor.
96 says the fuel pump relay did not pink but you say you are driving it.
77 says you did not put your foot on the skinny pedal during the test.
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Junior User
Joined: May 2006
Posts: 55
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From: Finland,Europe
Hi. Thanks for answering.
"There are no such codes 10 or 27 for your truck to start with."
But that´s what the code reader says?
Code 10 is "separation code" so its not actual fault code,i shouldnt have listed it,sorry about confusion.But it really read code 27.
"32 says you have an open wire going to the EVP sensor."
Meaning what? What should i look for?
Thanks,Tommi
"There are no such codes 10 or 27 for your truck to start with."
But that´s what the code reader says?
Code 10 is "separation code" so its not actual fault code,i shouldnt have listed it,sorry about confusion.But it really read code 27.
"32 says you have an open wire going to the EVP sensor."
Meaning what? What should i look for?
Thanks,Tommi
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
Looking at the Ford's "Engine/Emissions-Diagnosis 1989 Shop Manual"
Under the truck 4.9 engine code listing the manual does not show a 27.
I would take that code reader back and get my money back.
Then get a paper clip and read the codes again.
Do not use a code reader on any 86-95 trucks.
If you do not know how to use the paper clip go to this URL:
http://fordfuelinjection.com/?p=13
It means that the voltage coming back to the EEC computer on the EVP sensor wire is below what the voltage could possibly be (maybe zero volts) unless you have an open circuit.
The open circuit could be a bad EVP sensor (open), broken wire or bad plug pin.
Under the truck 4.9 engine code listing the manual does not show a 27.
I would take that code reader back and get my money back.
Then get a paper clip and read the codes again.
Do not use a code reader on any 86-95 trucks.
If you do not know how to use the paper clip go to this URL:
http://fordfuelinjection.com/?p=13
Originally Posted by TommiFIN
"32 says you have an open wire going to the EVP sensor."
Meaning what? What should i look for?
Meaning what? What should i look for?
The open circuit could be a bad EVP sensor (open), broken wire or bad plug pin.
Last edited by subford; Jan 29, 2008 at 07:59 AM.
Elder User
Joined: Jun 2006
Posts: 805
Likes: 3
Umm, 96 could mean someone tested the fuel pump at the DCL. Been there, done that. Scared the crap outta me. I had no CEL before I ran the test, then started the truck and had a CEL. Just KNEW I blew something up tinkering. But, found out, by experimenting a LOT of times, that a 96 will be generated when the fuel pump test input is jumpered to run the pump. If your sooper dooper scanner that gives you codes that your truck cannot have, perhaps it runs a fuel pump test too. Dunno. Guaranteed, though, if you turn on the pump by bypassing the ECM, you WILL get a 96. Worked that way on both my 92 F-150, and my '86 'Bird.
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