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Old 04-15-2014, 06:07 AM   #1
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Gas milage

93 mustang gt conv

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Old 04-15-2014, 06:11 AM   #2
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I only get about 8 mpg in my 93 mustang gt conv it's pretty much all stock except bbk shorty headers and bbk cold air intake I can't s see how people get 20 mpg if anybody has any tips please let me know thanks

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Old 04-15-2014, 09:33 AM   #3
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8 mpg?! Holy ****. I average about 19 in my '14 GT and I drive it like I stole it. I figured newer cars were better at fuel efficiency but wow.
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Old 04-15-2014, 01:11 PM   #4
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I it only has 80000 miles on everything is almost new everyone says they get almost 20 mpg I am not even close to that

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Old 04-15-2014, 01:29 PM   #5
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My 94 with a 347, Vortech V1 @ 10 PSI and 3.73 rear axle gets over 15 mpg.

I would suggest a tune up or a different driving style.
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Old 04-15-2014, 01:31 PM   #6
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I Just Tuned It And I Drive It normal

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Old 04-15-2014, 08:05 PM   #7
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Might be ready for new injectors
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Old 04-15-2014, 09:50 PM   #8
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I am Gonna Try That Next Didnt Try That yet

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Old 04-16-2014, 01:50 PM   #9
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I got 25mpg out of my 95 Cobra if I kept it at 65mph on the highway with the 3.73 gears and kept a light foot. I get over 20mpg with my bolt on 98 and I think that number is going to go up a good deal with the new wheels/tires I just put on. Something is wrong with your car or you just drive like a maniac or both.
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Old 04-16-2014, 02:30 PM   #10
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You definitely want to give the car a tune up. When's the last time the fuel filter has been changed? Have you checked out the spark plugs? When was the last time the O2 sensors have been changed? 80,000 miles, if they're original O2 sensors, I'd definitely through in a new set!

You said a lot of components were brand new. Can you make a list of all the recently replace parts?

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Old 04-16-2014, 02:32 PM   #11
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Ahhhh I get 11 in my coyote. E85 ๐Ÿ‘

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Old 04-16-2014, 03:11 PM   #12
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New parts are new transmission new air intake ( the one where the filter is inside the fender) whole new exhaust did o2 sensors when did exhaust new plugs and wires (GOT THE GOOD WIRES 100$)all new tires. These shouldnrt affect gas but I will say any way new radiator,water pump, heater coil, starter that's all can think of now

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Old 04-16-2014, 03:13 PM   #13
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Did fuel filter last week with tune up

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Old 04-16-2014, 03:42 PM   #14
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Ahhhh I get 11 in my coyote. E85 ๐Ÿ‘

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Lol
It's a good thing E85 is relatively inexpensive!
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Old 04-16-2014, 03:46 PM   #15
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Did fuel filter last week with tune up

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Did you check the timing to make sure that it's set correctly?
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Old 04-16-2014, 04:53 PM   #16
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Lol
It's a good thing E85 is relatively inexpensive!
****s gone up 70ยข in the last 3 months lol. Yesterday was the first time I had to pay over $3. Lol. Yes its cheap. In the long run its more expensive though. Less mpg. More frequent oil changes. I change mine every 2,000 miles. E85 breaks down oil quick. Now royal purple came out with a new one. Its called XPR. Its for e85 and race gas. So I will be trying this next.

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Old 04-16-2014, 05:00 PM   #17
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Someone just told me about the timing I am going to get that checked tomarow

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Old 04-17-2014, 02:37 PM   #18
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Your base timing should be set at 10*. Make sure it hasn't moved from there. Also, you're still running the stock tune right? No chip or anything? Does the car run perfectly smooth or does it buck around or stall?

What about your MAF sensor? Have you tried cleaning it?

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Old 04-17-2014, 04:40 PM   #19
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It all stock no chip and run smooth but it idol s a little higher then it should. whatt is a maf sensor? Sorry don't know to much about mechanics

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Old 04-17-2014, 04:58 PM   #20
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My 2005 V6 will get 26-28 mpg on the highway if I'm just cruising at 70-75. Unfortunately where I live, that isn't the case. Around here I get 19-22mpg.
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Old 04-17-2014, 05:10 PM   #21
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It all stock no chip and run smooth but it idol s a little higher then it should. whatt is a maf sensor? Sorry don't know to much about mechanics

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The Mass Airflow sensor is in the round thing that's right next to the air filter on the intake tube. You'll see where there is a wire connector attached to it.
You might also take your throttle body off and clean it up as well.
After you do all of that, if your idle is still high, you probably need to replace the Idle Air Control valve.
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Old 04-17-2014, 05:18 PM   #22
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I'm about to find out the new mileage on my 98. New wheels/tires just installed. Speedo is accurate via a spherical. Gone 150 miles on half a tank so I'm hoping 22-24 and I don't exactly go easy on it either.

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Old 04-18-2014, 02:23 PM   #23
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It all stock no chip and run smooth but it idol s a little higher then it should. whatt is a maf sensor? Sorry don't know to much about mechanics

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The Mass Airflow sensor is in the round thing that's right next to the air filter on the intake tube. You'll see where there is a wire connector attached to it.
You might also take your throttle body off and clean it up as well.
After you do all of that, if your idle is still high, you probably need to replace the Idle Air Control valve.
straybullitt has you covered OP! You can pick up some MAF cleaner from your local auto parts store. Use the cleaner very sparingly and make sure you hold the can about a foot away from the MAF while spraying.

Cleaning the throttle body can be helpful too. You might as well clean it while you have CAI off. This could help your idle issues!

Shane
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Old 04-18-2014, 06:25 PM   #24
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Ok thanks I am going g to try all that my next day off

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---------- Post added at 11:25 PM ---------- Previous post was at 11:25 PM ----------

I will let u know if it works

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Old 04-23-2014, 01:46 PM   #25
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Ok I cleaned the MAF, cleaned the idle control valve, changed the throttle position sensor and still have high idle when i I'm park or in neutral and I don't think the gas changed still calculating that though
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Old 04-23-2014, 03:57 PM   #26
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It actually idle higher now. It's about 1500 rpm when it's in park or neutral I adjusted the throttle position sensor it's at about 9 volts
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Old 04-23-2014, 04:02 PM   #27
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Old 04-23-2014, 06:12 PM   #28
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You're probably going to have to REPLACE the IAC.
Try disconnecting the battery for about 20 min and then let the car idle for about 15 min so it can relearn the idle.
If that doesn't work, replace the IAC with a NEW, good quality replacement and do the idle relearn procedure, that I just suggested, again.
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Old 04-23-2014, 06:14 PM   #29
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And the throttle position sensor on our cars is NOT adjustable...
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Old 04-23-2014, 10:32 PM   #30
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I know I had to drill holes out on sensor to adjust it that s what it said to do on American muscle video
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