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Left the house tonight in the 1990 245. It's a 5-spd, but LH 2.4 for certain. As we pulled out of the driveway, I immediately noticed the car was running poorly under load. Was running fine an hour earlier. Starts fine.
Acceleration OK, but rough and not what it usually is. When I got home (at 3:00am) I checked for codes. From the FI, I got: a 2-3-1 (rich/lean at cruise) and 3-1-2 (missing knock signal from ICU), and from the ICU I got a 2-1-4 (bum/missing RPM sensor signal).
She's definitely running lean. Vacuum/intake hoses are new. The RPM sensor is brand spanking new (maybe two weeks old). Knock sensor status is unknown.
Before I start digging in tomorrow, I figured I'd ask: Has anyone had this combination of codes before?
Any thoughts? Thanks!
-Ryan
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Athens, Ohio -- 1990 245, 125k, M47, E-codes -- 1991 745, 278k (girlfriend-mobile)
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