New PCM = Less power?
Okay, so I've gotten my Bonneville back from the dealer with a new computer installed and programmed. And she runs perfect... except that she doesn't seem to have the same kick she used to have. In fact, it runs about like it did when I drove it for a few weeks with the Supercharger belt off. I'm going to call the dealer back, and see what he thinks, but I thought I'd run it past you guys first.
This car is a '96 SE, upgraded with the L67, supercharged engine. It is badged with a "Supercharged" emblem on the trunk, but other than that, it looks like a typical SE car. There isn't even a boost guage in the dash. If he programed the new computer like a normally aspirated one, failing to notice the SC, would I see basically weaker performance like that? (Just a thought)
Is it possible that the old PCM was not a stock unit and had been upgraded to something aftermarket that was making her run faster... and now I've got a stock one?
Again... she runs good..... just about 20% less kick in the pants than she used to have.
A side note: The dealer told me the car needed a new O2 sensor, and I should bring it back in. The CEL was not on, he says, because the sensor was stuck in the middle range and thus still sending a signal. The next day, the light came on and there is a strange smell upon turning the car off. (symptomatic of a bad O2, I understand). It ran weaker from the time I picked her up, though.
Any thoughts appreciated, as always!