i have a 1989 325is and it doesn't have a cat. will this make cause me to get poor gas mileage? plus what should a 1989 325is get on average in the city?
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You will not get worse gas mileage without it. Because the car is obd1, the o2 sensor is before the cat only and will not care if there is a cat or not. The exhaust will actually have slightly less restriction because there is no cat, so mileage should stay close to stock or tiny bit better.Originally posted by cabriodster87"Honey? What color is this wire? Is it the same as that one? Are you sure? I don't believe it. OK, it works. Thank you sweetie."Originally posted by Kershawi've got a boner and a desire to speed.
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Originally posted by dashboardmonkey View Postwell that's what i get anyway
i drive it pretty hard tho
well, except on the track when it's like 8-12..
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15mpg is pretty low there. My '88 iS cammed, chipped and running 19lb injectors only got down to 17-22mpg and I flogged it routinely.Need a part? PM me.
Get your Bass on. Luke's r3v Boxes are here: http://www.r3vlimited.com/board/showthread.php?t=198123
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Originally posted by nando View PostI have a thirsty 2.8 liter and on it's worst day I don't get less than 18. lol
well, except on the track when it's like 8-12..
DaveE30 Dinan Turbo
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Please correct me if im wrong but...
How does a cat effect gas mileage on a pre OBD car???
An OXYGEN SENSOR will effect fuel economy not a cat. The cat does NOTHING to effect fuel trim.
If the car had a post cat O2 sensor it would effect fuel trim but our cars only have one and its BEFORE the cat.[IMG]http://www.r3vlimited.com/board/
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