Engine over revs after a repair.
Thread Starter
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
Sometimes God takes pity on us Dummy's.
Disconnected the air bridge to the Throttle Body to make sure the butterfly was not sticking, was OK. Started the motor several times, of course it would stall almost immediately. Connected everything back up, it started, reved a little and settled into a normal idle. Let it idle for 5 min for the PCM to relearn, went for a drive and it runs like a bomb again.
Dumb luck and the hand of God.
Also had a PCM 10 code which I could not find in the Service Manual.
Cheers.
Disconnected the air bridge to the Throttle Body to make sure the butterfly was not sticking, was OK. Started the motor several times, of course it would stall almost immediately. Connected everything back up, it started, reved a little and settled into a normal idle. Let it idle for 5 min for the PCM to relearn, went for a drive and it runs like a bomb again.
Dumb luck and the hand of God.
Also had a PCM 10 code which I could not find in the Service Manual.
Cheers.
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
Sometimes God takes pity on us Dummy's.
Disconnected the air bridge to the Throttle Body to make sure the butterfly was not sticking, was OK. Started the motor several times, of course it would stall almost immediately. Connected everything back up, it started, reved a little and settled into a normal idle. Let it idle for 5 min for the PCM to relearn, went for a drive and it runs like a bomb again.
Dumb luck and the hand of God.
Also had a PCM 10 code which I could not find in the Service Manual.
Cheers.
Disconnected the air bridge to the Throttle Body to make sure the butterfly was not sticking, was OK. Started the motor several times, of course it would stall almost immediately. Connected everything back up, it started, reved a little and settled into a normal idle. Let it idle for 5 min for the PCM to relearn, went for a drive and it runs like a bomb again.
Dumb luck and the hand of God.
Also had a PCM 10 code which I could not find in the Service Manual.
Cheers.
The computers are displaying their address in hexadecimal .... a base 16 number system .... it is commonly used at the "assembler" level of programming because there are 8 bits in a byte, and two possible numbers in a bit (0 or 1) so a "byte" can be represented with two "hex" digits.
I saw a "personalized" plate on a car in Silicon Valley a few years ago .... it had C6 E4 on the plate .... and on the plate frame it said "EBCDIC" ..... when translated using IBM's EBCDIC character set (which uses hexadecimal numbering for characters) ....
the plate said "F U" which the DMV has on its "banned" list
Another Silicon Valley story ... there is an old Volkswagen "bug" driving around with personalized plates that say FEATURE ...... why ??? .... because in the software business whenever a customer complains about a "bug" in the software, a vendor always replies "That's not a bug .... that's a feature" .......
Thread Starter
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
The Q is the PCM code causes a check engine light. I can delete the code and it stays off until restarting the engine which triggers it again??? Will have to get it diagnosed by my local garage friend.
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
I took your previous post to mean that you saw a "10" as the code .... what are you seeing ????? Obviously you have a code if the CEL is on.
Thread Starter
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
That is not a code ..... I already explained that the 10 is the computer's address on the network.
A DTC code has the following layout ..... P 1234 C
The leading letter ("P" in this example) indicates what system in the car the code applies to (P=Powertrain, C=Chassis, B=Body, U=CommUnication) .... the next four positions are numbers .... followed by either a "C" or an "H" (sometimes both) indicating the status of the code .... Current or History.
If you have the CEL illuminated you have at least one DTC set in the car. If you don't know how to display the codes ... read these instructions .......
https://www.corvetteforum.com/techti...D=26&TopicID=1
Post the codes and someone can help diagnose them.
A DTC code has the following layout ..... P 1234 C
The leading letter ("P" in this example) indicates what system in the car the code applies to (P=Powertrain, C=Chassis, B=Body, U=CommUnication) .... the next four positions are numbers .... followed by either a "C" or an "H" (sometimes both) indicating the status of the code .... Current or History.
If you have the CEL illuminated you have at least one DTC set in the car. If you don't know how to display the codes ... read these instructions .......
https://www.corvetteforum.com/techti...D=26&TopicID=1
Post the codes and someone can help diagnose them.
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Melting Slicks
Joined: Aug 2003
Posts: 2,786
Likes: 7
From: Iowa
Another Silicon Valley story ... there is an old Volkswagen "bug" driving around with personalized plates that say FEATURE ...... why ??? .... because in the software business whenever a customer complains about a "bug" in the software, a vendor always replies "That's not a bug .... that's a feature" .......
Thread Starter
Safety Car
Joined: May 2003
Posts: 3,814
Likes: 105
From: Dearborn Heights Michigan
Sorry for MY confusion. During the self diagnostic routine the 10 PCM code flashed so fast that I overlooked it and with the self diagnostic option it showed only 10 PCM - 1code.
The code is P0107 which is: Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage. May have been caused when I disconnected the air bridge and cranked over the engine.
Sorry again.
The code is P0107 which is: Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage. May have been caused when I disconnected the air bridge and cranked over the engine.
Sorry again.
