I just got my car runing 91 Camaro 5.0 TBI.
after replacing the O2 sensor and cleaning other valves. I have notice the the car has lost some power and the engine vibrates alot specially on 5th gear the car has a hard time accelerating. I also get Intermittent service engine soon. Should I have it scanned? would I get any code? What could it be....


Thanks in advance...

 

Definitly get your car scanned. You said you replaced your O2 sensor and cleaned out the valves, what did you use to clean the valves and was the O2 sensor bad that you had to replace it? Try checking your timing maybe?

 

RS,

Yes, have the ECM scanned. Ask your clone to do it. Tell him to get a key, a flashlight, a paper clip, and a notepad. Follow the instructions in the Tech Articles on this site.

If that Tech Article isn't clear enough (it is a little misleading) then you can try this:


First, you'll need to acquire a GM OBD I ECM Diagnostic Trouble Code Retrieval Tool (commonly known as a paper clip to TGO members).

With the engine and ignition turned off, locate the ALDL connector under the dash, just to the right of the steering wheel in the driver's foot well area. There should be a small rectangular cover over the access hole in the lower dash trim.



Insert a tool as described above (paper clip) into the 'A' and 'B' terminals on the ALDL connector:



WITHOUT STARTING the engine, turn the ignition to the "RUN" position. Watch the Malfunction Indicator Lamp (MIL) and it will begin to flash. This is also commonly called the "Service Engine Soon" or "SES" lamp. The first code will flash three times, and will usually be a code '12'. This is encoded by one flash of the lamp, a brief pause, then two successive flashes of the lamp. Each code will repeat three times, so you should see a "Code 12" flash three times. Any other error codes will follow in numerical order, and each code should flash three times. After all codes have been displayed three times, the "Code 12" will again flash three times, then all other codes will follow as described earlier. This cycle will continue until the jumper is removed or the ignition is turned off.

After you have made a note of all error codes, turn off the ignition and remove the jumper immediately. If you forget to remove the jumper and attempt to start the engine with it in place, you could damage the ECM. For this reason you should remove it immediately.

Once you have a note of all error codes, check this file for the decoding:

GM Error Codes.pdf.

You'll need Adobe Acrobat Reader to open/print the file.

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Later,
Vader
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Justice and Freedom will Prevail

 

Thanks for all the info....