Hidden codes 82 84
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Hidden codes 82 84
I have an 89 f150 4.9 standard with 5 speed OD
my issues are driving me crazy. I am just starting my apprenticeship for technician and get lots of help from the journeymen there, but my truck tends to be a little old for them.
2 scenarios
1: Driving up hill, truck will buck with a CEL flash. Not steady.
2: Driving up hill, WOT, my CEL will flash a couple times then become solid. Top of the hill I release pedal and the CEL turns off.
once home, I ran codes and got 82 84.
i replaced vacuum lines, egr, egr vacuum regulator, both airb & aird solenoids, replaced upper manifold throttle body EGR and IAC gaskets, adjusted timing, fixed a couple GROUND wires.
Still have those hidden codes.
in the past year or 2 I had a bunch of work done, including cleaning my injectors, throttle body, IAC.
Replaced spark plugs and wires, MAP, TPS, distributor cap and rotor, PCV valve, fuel filter, and fuel pressure regulator.
im going to do a compression test soon, but is there anything that I keep overlooking?
my issues are driving me crazy. I am just starting my apprenticeship for technician and get lots of help from the journeymen there, but my truck tends to be a little old for them.
2 scenarios
1: Driving up hill, truck will buck with a CEL flash. Not steady.
2: Driving up hill, WOT, my CEL will flash a couple times then become solid. Top of the hill I release pedal and the CEL turns off.
once home, I ran codes and got 82 84.
i replaced vacuum lines, egr, egr vacuum regulator, both airb & aird solenoids, replaced upper manifold throttle body EGR and IAC gaskets, adjusted timing, fixed a couple GROUND wires.
Still have those hidden codes.
in the past year or 2 I had a bunch of work done, including cleaning my injectors, throttle body, IAC.
Replaced spark plugs and wires, MAP, TPS, distributor cap and rotor, PCV valve, fuel filter, and fuel pressure regulator.
im going to do a compression test soon, but is there anything that I keep overlooking?
Fleet Owner
Joined: Aug 2005
Posts: 23,666
Likes: 301
From: Easton,Ks
Service Code 82 indicate that voltage output for Air Management solenoid(s) did not change when activated.
Possible causes:
-- Solenoid circuits shorted to power.
-- Solenoid circuits open or grounded.
-- Solenoid resistance out of range.
-- Damaged processor.
Service Code 84 indicates a failure in the EGR Vacuum Regulator (EVR) solenoid circuit.
Possible causes:
-- Damaged EVR solenoid
-- Open harness
-- Shorted harness
-- Damaged processor
Note that both of these codes are KOEO codes so you have stored codes in CM with the CEL coming on and you need to find out what they are and post them here so we can help you.
The CM codes are read out right after the KOEO electrical codes are done and a space code of 1 or 10 (1 CEL & 10 if you are using a code reader).
Possible causes:
-- Solenoid circuits shorted to power.
-- Solenoid circuits open or grounded.
-- Solenoid resistance out of range.
-- Damaged processor.
Service Code 84 indicates a failure in the EGR Vacuum Regulator (EVR) solenoid circuit.
Possible causes:
-- Damaged EVR solenoid
-- Open harness
-- Shorted harness
-- Damaged processor
Note that both of these codes are KOEO codes so you have stored codes in CM with the CEL coming on and you need to find out what they are and post them here so we can help you.
The CM codes are read out right after the KOEO electrical codes are done and a space code of 1 or 10 (1 CEL & 10 if you are using a code reader).
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So I ran the codes and got Code 53
TP circuit above maximum voltage.
This was after the initial 81, 82, 84 (81 did not appear the last time I ran codes)
I tested the wiring to the TPS and the TPS itself. Both are good, now would this mean my pcm is shot?
TP circuit above maximum voltage.
This was after the initial 81, 82, 84 (81 did not appear the last time I ran codes)
I tested the wiring to the TPS and the TPS itself. Both are good, now would this mean my pcm is shot?
Cargo Master
Joined: Jun 2013
Posts: 3,177
Likes: 15
From: Somewhere n North America
Engines are easier to diagnose over the internet when ALL the codes are listed, and in order of test.
KOEO - (O) Self-Test Codes =
KOEO - (C) Continuous Codes =
KOER - (R) Self-Test Codes =
Make sure your A/C, Heat, Radio, etc. are turned off when testing.
"I tested the wiring to the TPS and the TPS itself."
What were the actual readings of the TPS?
KOEO - (O) Self-Test Codes =
KOEO - (C) Continuous Codes =
KOER - (R) Self-Test Codes =
Make sure your A/C, Heat, Radio, etc. are turned off when testing.
"I tested the wiring to the TPS and the TPS itself."
What were the actual readings of the TPS?
Thread Starter
|
New User
Joined: Aug 2017
Posts: 7
Likes: 0
Engines are easier to diagnose over the internet when ALL the codes are listed, and in order of test.
KOEO - (O) Self-Test Codes =
KOEO - (C) Continuous Codes =
KOER - (R) Self-Test Codes =
Make sure you A/C, Heat, Radio, etc. are turned off when testing.
"I tested the wiring to the TPS and the TPS itself."
What were the actual readings of the TPS?
KOEO - (O) Self-Test Codes =
KOEO - (C) Continuous Codes =
KOER - (R) Self-Test Codes =
Make sure you A/C, Heat, Radio, etc. are turned off when testing.
"I tested the wiring to the TPS and the TPS itself."
What were the actual readings of the TPS?
green .78 (closed) 4.55 (wide open)
black 15.2 ohms
I fixed a ground wire, reset my comp. ran codes after 15 mins run time.
Self-test 81 84
continuous 53
Cargo Master
Joined: Jun 2013
Posts: 3,177
Likes: 15
From: Somewhere n North America
What were your 82 & 84 fixes ?
Hopefully you did get some codes, 11's.....
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3rd Gear
Joined: Feb 2024
Posts: 3
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Well where's the new thread what did you figure out I'm kind of having the same issues
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