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Well my most recent TBI tuning saga continues. Tonight, for no apparent reason after chasing my tail a while on the VE table, flow rate and AE tables, the MAP sensor stopped reporting in the datastream... It's locked at 54 some KPA.... No error codes.....
Any ideas?
And randomly the MAP sensor is reporting in the datastream again. I unplugged and plugged the ALDL connector back in. Could it really have been that simple?
While driving around and still working on figuring out what fueling this thing likes I'm still dealing with an intermittent lean pop in some of the middle to upper VE cells it seems. When this happens it SEEMS that it causes the MAP sensor to LOCK in midrange, about 50 to 55 KPA or so and it STAYS locked there for a time that is random and un-repeatable.
Is there a setting that might be causing this? Any thoughts?
Could it be the sensor damaged from the pop.I'm guessing u'd have a spare to try or already did.if it's not mechanical in the sensor that's a very odd electrical issue.hard to make sense
Well I wondered about that. The issue with the MAP sensor comes and goes. Going to try to get another one or two GM sensors from a friend and try them.
An update to the problem. It APPEARS that the MAP sensor crapped out. Checked it with a multimeter and it was displaying about 2.5 V with KOEO. Swapped around several other MAP sensors and they display something closer to 5V with KOEO, AND they report high MAP on TP also......
Can't believe the MAP went bad, and it was only doing it sometimes. I guess the next step is I will cut open the old MAP... Curious what it looks like in there as I've never seen one filet-ed open before :)