This is topic Slower quarter times & poor gas milage, why?? in forum Tech Talk at Northern California Ford Owners .
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Posted by 94RedGT (Member # 171) on
:
Last summer I was running consistant 14.7s, but I was at the track on Wednesday and was barely hitting 14.9s... My gas milage has also dropped significantly, I was getting 250 miles on one tank, now I'm barely getting 200. My only modification has been a Prochamber. Any ideas??
Posted by Blown Mystic (Member # 476) on
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have u changed air and fuel filters and given it a tune-up??
tried a bottle of injector cleaner?
Posted by st5150 (Member # 51) on
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What were your trap speeds? Trap speeds reflect your power to weight ratio going down the track. They're a better indication of what power you're making compared to ET. As for your MPG.... pull the codes from the computer to start with. EGR and O2's are common sensors to cause a decrease in fuel economy.
Posted by shade-tree (Member # 298) on
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mileage, check plugs, wires, cap/rotor, air filter. last resort 02 sensor.
running 14.9s in wednesday's 90+ heat and 2000 ft. density air doesn't sound too bad to me. Could be equivalent to your previous 14.7 run. Was it much cooler than wednesday? I bet it was.
Posted by 94RedGT (Member # 171) on
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I was trapping around 91-92 mph. The car has 125,000 miles, I've put on around 7,000 since the last time I ran it. I did the whole tune up thing(wires, plugs, rotor) about 15,000 miles ago, I'll check out my air filter and try some injector cleaner.
How do I pull the codes from my computer?? How would I know if I had a bad sensor? Also, how often should I change the fuel filter?
[ June 01, 2002, 03:15 PM: Message edited by: 94RedGT ]
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