Really Bad Gas Mileage - Taurus Car Club of America : Ford Taurus Forum
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post #1 of 17 (permalink) Old 10-29-2018, 05:00 AM Thread Starter
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Really Bad Gas Mileage

I'm only getting a little more than 11 or 12 miles a gallon.
First things I've done to this car (has less than 73K miles) All new tires. Put in new air filter. I've cleaned the MAS, IAC valve. I changed the oil to 5-30W full synthetic and at that time I put in one bottle of Techron.
Last week I put in new plugs and wires (it was missing once in a while). Seems to be running good at this time. Also checked the PCV valve and it was good. I know there is a exhaust leak and or catalytic converter problem (P0430 code). Could that be what's causing the problem??
I'm afraid how much a muffler shop is going to charge me for new cat. (I'm retired, fixed income).


Also there could be a vacuum leak. Lack of power... I will try to find the vacuum leak using carb cleaner and will let you guys know what I find...
What would be the normal Florida rate to fix the catalytic converter???
I appreciate this site and advice given!


Thanks, Jerry

2002 Taurus Wagon, 3.0L Vulcan OHV
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Last edited by Jerry Brown; 10-29-2018 at 05:22 AM.
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post #2 of 17 (permalink) Old 10-29-2018, 07:21 AM
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Originally Posted by Jerry Brown View Post
I'm only getting a little more than 11 or 12 miles a gallon.
First things I've done to this car (has less than 73K miles) All new tires. Put in new air filter. I've cleaned the MAS, IAC valve. I changed the oil to 5-30W full synthetic and at that time I put in one bottle of Techron.
Last week I put in new plugs and wires (it was missing once in a while). Seems to be running good at this time. Also checked the PCV valve and it was good. I know there is a exhaust leak and or catalytic converter problem (P0430 code). Could that be what's causing the problem??
I'm afraid how much a muffler shop is going to charge me for new cat. (I'm retired, fixed income).


Also there could be a vacuum leak. Lack of power... I will try to find the vacuum leak using carb cleaner and will let you guys know what I find...
What would be the normal Florida rate to fix the catalytic converter???
I appreciate this site and advice given!


Thanks, Jerry

First thing to do when not getting good MPG. Check the brakes. Routine check is to drive around the block on a resting cool car and check for heat in brakes. Common fails. Another routine check. Park overnight on a flat surface with the parking brake on. Start, release the brakes, and note how it moves away. At idle it should roll out at a fast walking pace.


-chart-
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post #3 of 17 (permalink) Old 10-29-2018, 11:32 AM Thread Starter
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Oh I forgot to mention I also put new brake pads on the front. I will check out your suggestions on the parking brake and all that tomorrow. Thanks

2002 Taurus Wagon, 3.0L Vulcan OHV
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post #4 of 17 (permalink) Old 10-29-2018, 11:38 AM
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Oh I forgot to mention I also put new brake pads on the front. I will check out your suggestions on the parking brake and all that tomorrow. Thanks
New bks with stuck guide pins, common problem. I bought '11 Buick Lucerne at 59K no rust car with new rotors and pads. It had a stuck guide pin and overly hot front brake. Pin totally dry, no grease from new.


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post #5 of 17 (permalink) Old 10-29-2018, 08:42 PM
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^+1 with Chart. After a brief drive, touch the center of each wheel feeling for any that are abnormally hot.
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post #6 of 17 (permalink) Old 11-01-2018, 09:07 AM
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I was experiencing bad gas mileage like this just before my ignition coil pack started to fail.

I was getting 12-13 mpg in-town with the worn ignition coil pack, but I was back up to the 16-17 range in-town with the new one.

I was really surprised by the fuel mileage improvement.

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post #7 of 17 (permalink) Old 11-01-2018, 12:35 PM Thread Starter
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When I put in new plugs and wires I thought I'd take a look at the bottom of the coil pack. It's white plastic under there and I did see a couple cracks. Would that be enough to Warrant a new coil pack?

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post #8 of 17 (permalink) Old 11-01-2018, 03:52 PM
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When I put in new plugs and wires I thought I'd take a look at the bottom of the coil pack. It's white plastic under there and I did see a couple cracks. Would that be enough to Warrant a new coil pack?

Yup, if you've got any cracks it needs to be replaced.

Kevin

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post #9 of 17 (permalink) Old 11-01-2018, 05:27 PM
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Originally Posted by Jerry Brown View Post
When I put in new plugs and wires I thought I'd take a look at the bottom of the coil pack. It's white plastic under there and I did see a couple cracks. Would that be enough to Warrant a new coil pack?
Any coil crack will cause a misfire. Depends on the weather. Random misfire feel without a cell. Spritz this one with water spray and it went crazy. New coil and runs fine.
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post #10 of 17 (permalink) Old 11-02-2018, 09:37 AM Thread Starter
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I'll get the new one tomorrow and put it in I'll let you guys know how it runs. It'll take a week or so to figure out what my gas mileage is. I only drive 10 to 20 miles a day.


Oh, I had a new back catalytic converter put in. It was $280 total. Not a bad price. The converter alone is $190 at Advance Auto...

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Last edited by Jerry Brown; 11-02-2018 at 12:26 PM.
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