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Old 02-22-2003, 04:43   #1 (permalink)
BIGXR8
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confused Need some Help??

Hi can some one tell me what the difference is between a Power balance test and what it is does? and a compression test I do know what a compression test is.

Matt
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Old 02-22-2003, 04:58   #2 (permalink)
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A power balance test is a mode you can put the EEC in to see if one or more cylinders are down on power. Basically the EEC shuts off one cylinder at a time and measures the rpm drop. If all cylinders are producing the same power, then there should be no difference

To do a cylinder balance test you need to:

1. Make sure the engine is fully warmed. If in doubt, run engine at 2000 rpm for 2 minutes.
2. Turn the ignition off and wait 10 seconds for system to shut off. Make sure A/C is off and transmission is in Park (automatic) or Neutral (manual).
3. Hook up a test lamp and jumper (or tester if you have one).
4. Start the engine.
5. Engine I.D. should be output.
6. Step on the brake and turn the steering wheel 1/4 turn. .
7. If a "Goose" pulse is received, move throttle quickly to WOT (wide open throttle) and release.
8. Fast Codes are output (ignore).
9. Read the codes.
10.Within 2 minutes of recieving the last code, lightly press the accelerator.
11. If any cylinder is found to be down on power, the EEC will output a code of cylinder number x 10 (ie. cylinder 4 = code 40)
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Old 02-22-2003, 05:04   #3 (permalink)
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Thanks for the info EDXR8 so if the compression is down say on two cylinders will it show up as a code.
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Old 02-22-2003, 16:57   #4 (permalink)
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yeah, if one or multiple cylinders are down on compression, or down in power for some other reason it will show up in the codes.
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