Hi guys,
I would like to resolve the low MPG problem on my car,
I have a 87 and 88 grand marquis, the 87 one is ok, it run fine and have a good MPG
but my 88 is wrost on fuel efficeiently the difference between the two cars is importent (around 40%)
I did a tune up on it : spark plugs, wiring, distributor cap : new, I did the timing adjustement to 10BTC (was a little bit to high)
no jammed brakes, bearings rotors, pad and calipers are new,
No check engine light, no smoke, no strange smells
What can I check or replace to improve the fuel efficiently on this car ?
I wonder if the o2 sensor or the map sensor doesen't work properly, the check engine light should turn on ?
thanks, and please excuse my English
I would like to resolve the low MPG problem on my car,
I have a 87 and 88 grand marquis, the 87 one is ok, it run fine and have a good MPG
but my 88 is wrost on fuel efficeiently the difference between the two cars is importent (around 40%)
I did a tune up on it : spark plugs, wiring, distributor cap : new, I did the timing adjustement to 10BTC (was a little bit to high)
no jammed brakes, bearings rotors, pad and calipers are new,
No check engine light, no smoke, no strange smells
What can I check or replace to improve the fuel efficiently on this car ?
I wonder if the o2 sensor or the map sensor doesen't work properly, the check engine light should turn on ?
thanks, and please excuse my English
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