Awful Gas Mileage
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Bear ****s Bone
Bear ****s Bone
Joined: September 5, 2011
Posts: 5,473
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From: Cleburne, Tx
Originally Posted by bluethunderhorse
Quick way to check for a vacuum leak, is to spray wd40 around the mating surfaces. If you hear any change in the way the engine runs, in any certain place then you've narrowed your search.
OP do not use wd40 unless you want a very oily intake/engine. Use brake clean or Carb cleaner as these willchange the idle without causing a nasty oily mess
Thread Starter
Joined: August 23, 2004
Posts: 3,599
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From: Bay Area, California
You're thinking tstat? I'm not sure exactly what temp the car is getting to but I can check.
Cobra R Member
Joined: December 11, 2011
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From: Mass
Thread Starter
Joined: August 23, 2004
Posts: 3,599
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From: Bay Area, California
The computer says 97 Celsius or about 205 Fahrenheit. Idle speed is at 700.
Bullitt Member
Joined: January 5, 2011
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From: Sacramento
Originally Posted by cntchds
You're thinking tstat? I'm not sure exactly what temp the car is getting to but I can check.
Thread Starter
Joined: August 23, 2004
Posts: 3,599
Likes: 3
From: Bay Area, California
Nope. Stays steady at just over 200 independent of outside temp. I'm running a tank of 91 octane Chevron to rule out if it was just bad gas.
Tasca Super Boss 429 Member
Joined: September 28, 2007
Posts: 3,844
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From: Midlothian, Va
Originally Posted by benjyc32
Is yours a gt? When I had my 01' it idled around 4,500-5,000... 8,000 is pretty high for you.
Bullitt Member
Joined: December 25, 2011
Posts: 229
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From: TN
Originally Posted by 1999Pony
I think you need to remove a zero, or take your foot off the gas when your at idle.
Tasca Super Boss 429 Member
Joined: September 28, 2007
Posts: 3,844
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From: Midlothian, Va
Originally Posted by benjyc32
My bad, 450-500... it's been a long day in the blazing heat of Tn.. But I vacuumed the inside, washed, and waxed my car, and detailed my my motor bay and made everything shiny for the car show this weekend!
Bullitt Member
Joined: December 25, 2011
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From: TN
Originally Posted by 1999Pony
Haha its all good, just had to give you a little crap at least.
Bullitt Member
Joined: January 5, 2011
Posts: 248
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From: Sacramento
How often do you run 91 octane a lot of people believe its okay to but the only time you want to run a higher octane is when you raise the compression ratio and there's no bad gas maybe a bad fuel filter restrictive fuel rails maybe a bad injectir
Thread Starter
Joined: August 23, 2004
Posts: 3,599
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From: Bay Area, California
Originally Posted by mdelao
The owners manual says that should use 89 octanes. Have you try before?
Originally Posted by shaunrc
How often do you run 91 octane a lot of people believe its okay to but the only time you want to run a higher octane is when you raise the compression ratio and there's no bad gas maybe a bad fuel filter restrictive fuel rails maybe a bad injectir
Bullitt Member
Joined: January 5, 2011
Posts: 248
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From: Sacramento
Originally Posted by cntchds
Yeah, I usually run 89.
This was a first. Just to experiment.
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