Had a previous donation thread which hasn't received any reply within the last 7 days, so I'm opening a new one.
Brought my 1990 Firebird 3.1L across country. Ran fine until I got here, then failed smog (5x allowable CO at 2500rpm - properly warmed), and then died the same day. It will start for a few seconds, but will not run otherwise.
Disconnecting the alternator allows it to run, albeit not all that smoothly, for a few minutes until the battery starts dieing. Alternator tested good three times at two different shops out-of-vehicle (14v). In the vehicle it shows less than 8v charge when running (from the cluster).
First shop was stumped. After replacing the radiator (hole pouring fluid) and O2 sensor (dead), they ran out of ideas. ECM swapped for known good to no effect. New plugs, wires, cap, rotor, fuel filter, air filter.
Towed to second shop. They claimed it's a bad alternator (internal short), and cited smog failure on high resistance in 5 injectors. I've been reading that high CO @ 2500 is more indicative of a bad cat.
What tests can I perform to help diagnose this problem, without throwing money at part swapping?
have the same problem?
Monday, August 8th, 2011 AT 2:04 AM