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Re: Need limp-home diagnostic help on 91 850!! (archive)
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Posted by Dale on December 19, 1999 at 09:08:35:

In Reply to: Need limp-home diagnostic help on 91 850!! posted by chris on December 18, 1999 at 17:23:13:

: On my 91 850, the engine runs on one bank when it is cold, and when it has been running for about 20 minutes, but it runs on all 12 in between those times. I have switched throttle motors, still same bank down, switched throttle bodies, same, replaced the coil, rotor and cap on the affected side, still no change. Does anyone have any ideas what this could be? The diagnostic code is main ignition module on the self test. HELP!!!!!!!
Chris, check voltage on both batteries,more than four years since replacement it maybe time,also if one is not up to spec's you should replace both.

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