5.8l challenge
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5.8l challenge
Here's a challenge for anyone willing to attempt. The truck is a 1992 F250 5.8L Windsor.
What’s the problem:ffice
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Idles high (and erratic) when warm. Idle will reach 2,000 rpm or higher. Does NOT throw a Check Engine Light. Note that this truck only sees about 3,000 miles a year.
What’s been replaced:
EGR valve, 6 months ago with aftermarket valve
TPS sensor, 9 months ago after low idle issues
MAP sensor, 3 months ago with aftermarket sensor
IAC valve and gasket, 3 weeks ago with new Ford part
EGR valve position sensor, 4 months ago with aftermarket sensor
Fuel filter, 1 week ago
Spark plugs, 1 year ago
Spark plug wires, 2 months ago
IAT sensor, 1 month ago with aftermarket sensor
Coolant temp sensor, 2 months ago with aftermarket sensor
EGR control solenoid, 1 week ago with aftermarket sensor
Oxygen sensor, 3 weeks ago with aftermarket sensor
Throttle body gasket, 1 month ago
Engine codes:<O></O>
Using a code reader, I received the following codes:
KOEO test: 111 (pass code)
Continuous memory: 334 (EGR closed voltage higher than expected)
KOER test: 334 (EGR closed voltage higher than expected)
<O></O>
So I replaced the aftermarket EGR valve position sensor with the original valve position sensor (that I had taken out earlier), reset the computer, took the truck for a test ride, and rescanned the codes and got the following:
KOEO test: 111 (pass code)
Continuous memory: 334 (EGR closed voltage higher than expected)
KOER test: 111 (pass code)
<O></O>
Since the KOER test now passed, I cleared the continuous memory code to get the following codes:
KOEO test: 111 (pass code)
Continuous memory: 111 (pass code)
KOER test: 111 (pass code)
<O></O>
The following day, I took the truck for a slightly longer test ride and noticed the same high (erratic) idle issues when the truck got warm. So I rescanned and got the following:
KOEO test: 328 (EGR closed voltage lower than expected)
KOER test: didn’t do it since I was already getting KOEO error code.
<O></O>
So I replaced the aftermarket EGR control solenoid that I had installed the day before with the original Ford part that I removed, reset the computer, took the truck for a test ride and rescanned the codes and got the same code as before:
KOEO test: 328 (EGR closed voltage lower than expected)
KOER test: didn’t do it since I was already getting KOEO error code.
<O></O>
<O></O>
Now I am suspecting problems with the PCM. I’ve thoroughly checked for vacuum leaks and nothing. HELP!
<O></O>
What’s the problem:ffice
ffice" /><O></O>Idles high (and erratic) when warm. Idle will reach 2,000 rpm or higher. Does NOT throw a Check Engine Light. Note that this truck only sees about 3,000 miles a year.
What’s been replaced:
EGR valve, 6 months ago with aftermarket valve
TPS sensor, 9 months ago after low idle issues
MAP sensor, 3 months ago with aftermarket sensor
IAC valve and gasket, 3 weeks ago with new Ford part
EGR valve position sensor, 4 months ago with aftermarket sensor
Fuel filter, 1 week ago
Spark plugs, 1 year ago
Spark plug wires, 2 months ago
IAT sensor, 1 month ago with aftermarket sensor
Coolant temp sensor, 2 months ago with aftermarket sensor
EGR control solenoid, 1 week ago with aftermarket sensor
Oxygen sensor, 3 weeks ago with aftermarket sensor
Throttle body gasket, 1 month ago
Engine codes:<O
></O>Using a code reader, I received the following codes:
KOEO test: 111 (pass code)
Continuous memory: 334 (EGR closed voltage higher than expected)
KOER test: 334 (EGR closed voltage higher than expected)
<O
></O>So I replaced the aftermarket EGR valve position sensor with the original valve position sensor (that I had taken out earlier), reset the computer, took the truck for a test ride, and rescanned the codes and got the following:
KOEO test: 111 (pass code)
Continuous memory: 334 (EGR closed voltage higher than expected)
KOER test: 111 (pass code)
<O
></O>Since the KOER test now passed, I cleared the continuous memory code to get the following codes:
KOEO test: 111 (pass code)
Continuous memory: 111 (pass code)
KOER test: 111 (pass code)
<O
></O>The following day, I took the truck for a slightly longer test ride and noticed the same high (erratic) idle issues when the truck got warm. So I rescanned and got the following:
KOEO test: 328 (EGR closed voltage lower than expected)
KOER test: didn’t do it since I was already getting KOEO error code.
<O
></O>So I replaced the aftermarket EGR control solenoid that I had installed the day before with the original Ford part that I removed, reset the computer, took the truck for a test ride and rescanned the codes and got the same code as before:
KOEO test: 328 (EGR closed voltage lower than expected)
KOER test: didn’t do it since I was already getting KOEO error code.
<O
></O><O
></O>Now I am suspecting problems with the PCM. I’ve thoroughly checked for vacuum leaks and nothing. HELP!
<O
></O>
