12 MPG?
02-27-2006, 04:09 PM
#1
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Location: Washington, MO 63090
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I have an '88 vert and I just did a 13b streetport swap. The car runs really good and feels great at high r's. However during normal driving, it is almost dumping gas ut the exhaust and kind of gutless. I do have a cold air intake and a extremely freeflowing exhaust so I know i'm not geting the back pressure for the secondaries. So they are permanently open which would account for the gutlessness at low r's. I am only getting 12MPG on a good day (170-180 miles per tank). My a/f gauge is telling me it is running lean to stoich, but the people behind me would disagree. Does anyone have any avenues I can explore to maybe remedy my condition. I can't help but think if the fuel mixture was right it would run better. And who doesn't want there car to run better?
Thanks,
Jack
Thanks,
Jack
02-28-2006, 12:57 PM
#6
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i've talked to the guys at Hayes Rotary in Redmond, WA, where i got the motor and they said nothing about a SAFC and i thought of the o2 sensor and he said not likely the problem. he keeps telling me the a/f adjusting screw on the pass side of the engine bay needs to be tested. and that brings up another question...is that suposed to change my a/f gauge reading when i adjust that.
02-28-2006, 01:40 PM
#7
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Originally Posted by jack' post='804951' date='Feb 28 2006, 01:57 PM
i've talked to the guys at Hayes Rotary in Redmond, WA, where i got the motor and they said nothing about a SAFC and i thought of the o2 sensor and he said not likely the problem. he keeps telling me the a/f adjusting screw on the pass side of the engine bay needs to be tested. and that brings up another question...is that suposed to change my a/f gauge reading when i adjust that.
That's an idle adjustment. It's not likely to have any significant bearing on your fuel economy.
02-28-2006, 05:14 PM
#9
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Originally Posted by 1988RedT2' post='804959' date='Feb 28 2006, 11:40 AM
That's an idle adjustment. It's not likely to have any significant bearing on your fuel economy.
and it does make a tiny difference on my a/f meter but it really affects the way the car runs.
02-28-2006, 09:57 PM
#10
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Originally Posted by jack' post='805006' date='Feb 28 2006, 04:14 PM
i think otherwise stamped right on it there is an L (lean) and an R (rich) to let you know which way to turn it.
and it does make a tiny difference on my a/f meter but it really affects the way the car runs.