service engine soon light
3rd Gear Member
Joined: Oct 2006
Posts: 774
From:
RE: service engine soon light
Yeah mvr reset the ecu by unplugging the battery. Laterus, you should take it to autozone and have the code pulled. That will tell you whether the prob is ignition, vacuum, timing etc.
5th Gear Member
Joined: Nov 2006
Posts: 3,569
From: So Cal
RE: service engine soon light
ORIGINAL: SmallFeesh
That could be your problem... unless your car is tuned for premium, Ford has tuned these cars to run on 87! Here is the word for word from the owners manual...
"Your vehicle is designed to use"regular" unleaded gasoline with an (R=M)/2 octane rating of 87. We do not recomend the use of gasolines labeld as "regular" that are sold with octane ratings of 86 or lower in high altitude areas."
"Premium unleaded gasoline is not recomended because it may cause these problems to become more pronounced"(starting, rough idle or hesitation driveability problems during cold start)
"It should not be necessary to add any aftermarket products to your fuel tank if you continue to use high quallity fuel of the recommended octane rating. Aftermarket products could cause damage to the fuel system."
That could be it... or ya just got some bad gas! Ever replaced your fuel filter?
That could be your problem... unless your car is tuned for premium, Ford has tuned these cars to run on 87! Here is the word for word from the owners manual...
"Your vehicle is designed to use"regular" unleaded gasoline with an (R=M)/2 octane rating of 87. We do not recomend the use of gasolines labeld as "regular" that are sold with octane ratings of 86 or lower in high altitude areas."
"Premium unleaded gasoline is not recomended because it may cause these problems to become more pronounced"(starting, rough idle or hesitation driveability problems during cold start)
"It should not be necessary to add any aftermarket products to your fuel tank if you continue to use high quallity fuel of the recommended octane rating. Aftermarket products could cause damage to the fuel system."
That could be it... or ya just got some bad gas! Ever replaced your fuel filter?
1st Gear Member
Joined: Aug 2006
Posts: 55
From:
RE: service engine soon light
dont change your o2 sensors thats probably not your probelm. basicalyyour o2 sensors monitor your a/f and the computer will constantly change your fuel trim to compensate. if the computer keeps trying to adjust your a/f and its not succesfull, it can thro a code for the o2s. your best bet is to disconect the battery for 10 minits. this will reset everything in your computer. If the check engine light comes back on then come back and post again. bad gas may give you a code like that.
4th Gear Member
Joined: Oct 2006
Posts: 1,565
From: Wilmington, Delaware
RE: service engine soon light
ORIGINAL: SmallFeesh
What octane are you running? And are you sure you put in "regular" gas and not that E-85 crap?
What octane are you running? And are you sure you put in "regular" gas and not that E-85 crap?
4th Gear Member
Joined: Oct 2006
Posts: 1,565
From: Wilmington, Delaware
RE: service engine soon light
ORIGINAL: SmallFeesh
That could be your problem... unless your car is tuned for premium, Ford has tuned these cars to run on 87! Here is the word for word from the owners manual...
"Your vehicle is designed to use"regular" unleaded gasoline with an (R=M)/2 octane rating of 87. We do not recomend the use of gasolines labeld as "regular" that are sold with octane ratings of 86 or lower in high altitude areas."
"Premium unleaded gasoline is not recomended because it may cause these problems to become more pronounced"(starting, rough idle or hesitation driveability problems during cold start)
"It should not be necessary to add any aftermarket products to your fuel tank if you continue to use high quallity fuel of the recommended octane rating. Aftermarket products could cause damage to the fuel system."
That could be it... or ya just got some bad gas! Ever replaced your fuel filter?
That could be your problem... unless your car is tuned for premium, Ford has tuned these cars to run on 87! Here is the word for word from the owners manual...
"Your vehicle is designed to use"regular" unleaded gasoline with an (R=M)/2 octane rating of 87. We do not recomend the use of gasolines labeld as "regular" that are sold with octane ratings of 86 or lower in high altitude areas."
"Premium unleaded gasoline is not recomended because it may cause these problems to become more pronounced"(starting, rough idle or hesitation driveability problems during cold start)
"It should not be necessary to add any aftermarket products to your fuel tank if you continue to use high quallity fuel of the recommended octane rating. Aftermarket products could cause damage to the fuel system."
That could be it... or ya just got some bad gas! Ever replaced your fuel filter?
Thread Starter
Joined: Mar 2007
Posts: 30
From:
RE: service engine soon light
ORIGINAL: beastzilla02
if you unplug the battery will the light turn off ? cuz mines been on as well but the car is running fine.
if you unplug the battery will the light turn off ? cuz mines been on as well but the car is running fine.
3rd Gear Member
Joined: Oct 2006
Posts: 774
From:
RE: service engine soon light
ORIGINAL: 00TropicGreenStang
Huh? Where do you live. I live in the Philly area and all the gas stations around here are E-85 and I get the E-85 93 octane and I don't get a check engine and I have a 93 tune.
ORIGINAL: SmallFeesh
What octane are you running? And are you sure you put in "regular" gas and not that E-85 crap?
What octane are you running? And are you sure you put in "regular" gas and not that E-85 crap?
Different forms of fuel;
diesel
pump gas, usaully carries a rating of 87-93 and can have a ethanol mix to drive the price lower and boost the octane.
E-85, 85% ethanol. very few places to get it right now, and can only be used in E-85 vehicles which to my knowledge are all trucks at this time
3rd Gear Member
Joined: Aug 2006
Posts: 633
From: South Louisiana
RE: service engine soon light
Run 87/89 in your ride........I used to be HARDCORE 93 Octane man until I bought this GT and this thing runs WAAAAYYY better on either 87 or 89. I figure it this way (and I could be wrong) but if you run 93 octane and it is not fully detonating......I theorize that that unspent fuel finds it's way out into the exhaust and onto the 02 sensor. Now if you burn the lower octane and the unspent fuel is cut back, then the 02 sensor will not get "wet" or caked and give your ECM the correct reading...Like I said this is theory but it is a DAMN good one 
Later
Later