Expert: autohelp - 1/11/2010

Question
QUESTION: i have codes  pc0340  pc1323  pc 1377 can you tell me what these are  thank you

ANSWER: AFTER each CODE displays the word History or Current displays.

I need to know which codes are History and which codes are Current

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QUESTION: i have a 1996 cad deville i clear the the the computer codes 2 days a ago now i have codes pc0340 pc0372 pc1323 pc1377 these come as history pc1350 as current my car seems to run ok at first after 15 mins it sometimes starts missing what do you think my problem or problems could be thank you again

ANSWER: You have a spark timing problem.

If you are mechanicaly inclined or know of someone who is, You will need a DIGITAL VOLT/OHM METER, Simple electrical schematics, Test procedures and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture. I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information necessary to fix your vehicle

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QUESTION: can you tell me how to clear computer codes 1996 cad sedan deville.

Answer
To CLEAR the PC codes with a DIGITAL instrument panel (speedometer) only.

1. redisplay the codes and the display will stop at PCM?

2. Push and release the HI (fan up) button and you will see PCM CODES?

3. Push and release the LO (fan down) button and you will see PCM CLEAR CODES?

4. Push and releae the HI button and you will see PCM CODES CLEAR?

5. Wait 3 seconds and turn ignition switch OFF.