Sudden Decrease in MPG
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Joined: Aug 2002
Posts: 81,385
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From: Appleton WI
if you guys are gettign 400+ on highway then what is wrong with my car? is it the 4 speed (D4) tranny becuase all of your guys cars are 5 speed (D5). i havent clean the EGR and i remeber when i had the car at 73K back in 2009 i used to get like 350+ MPG and in 2011 when i had 105K i got the timing belt and etc all changed and i have noticed a weird ticking sound when i am in a parking garage, which sounds like ticking vavles. So would that effect my MPG?
Tires can make a huge impact on mpg, Pressure in them as well. Dirty EGR ports, aging or bad o2s, dirty fuel injectors, valves that need adjusting, spark plugs. Your ticking, where is it coming from, drivers side near the firewall or the engine?
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Joined: Aug 2011
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From: Columbia, SC
Senior Moderator
Joined: Aug 2002
Posts: 81,385
Likes: 3,068
From: Appleton WI
Yes, i know. Im running 255/35/18 with 38psi for normal driving, 42 for hwy (when i know im going to be traveling)
BUT, Its a simple question. What PSI are you running. What is "Enough, not too much" Yes, every tire has a max psi rating and many are different from each other. But the question asked wasnt what is the tires max psi, its What is ENOUGH, NOT TOO MUCH = in PSI
BUT, Its a simple question. What PSI are you running. What is "Enough, not too much" Yes, every tire has a max psi rating and many are different from each other. But the question asked wasnt what is the tires max psi, its What is ENOUGH, NOT TOO MUCH = in PSI
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Joined: Aug 2011
Posts: 62
Likes: 1
From: Columbia, SC
Yes, i know. Im running 255/35/18 with 38psi for normal driving, 42 for hwy (when i know im going to be traveling)
BUT, Its a simple question. What PSI are you running. What is "Enough, not too much" Yes, every tire has a max psi rating and many are different from each other. But the question asked wasnt what is the tires max psi, its What is ENOUGH, NOT TOO MUCH = in PSI
BUT, Its a simple question. What PSI are you running. What is "Enough, not too much" Yes, every tire has a max psi rating and many are different from each other. But the question asked wasnt what is the tires max psi, its What is ENOUGH, NOT TOO MUCH = in PSI
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Joined: Aug 2011
Posts: 62
Likes: 1
From: Columbia, SC
I get 21.17 MPG with my 225/35/18's (Michelin Eagle RSA's) on 90% highway. And I have a max PSI of 44 but have it set at 46-47 on the rears (nothing ever in the rear seats or trunk) and 44 in the front.
I think you will know you have too much PSI when the ride gets awfully stiff around town and on potholes. I am always on the high way so I dont feel it too much unless I am around town.
I think you will know you have too much PSI when the ride gets awfully stiff around town and on potholes. I am always on the high way so I dont feel it too much unless I am around town.
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Joined: Aug 2012
Posts: 3,515
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From: New Berlin, WI.
Air pressure in tires..You start with the manufacturer recommendation and go from there never going lower then that spec and check your tire pressure regularly. For ex: After a few fill ups or when the temperature changes drastically like too hot, your tire pressure can change up to 4
psi.
Valves will start clicking and then you know they need to be done or just do it to get it done with.
Note: Valve adjustments are a back breaking job.....
psi.
Valves will start clicking and then you know they need to be done or just do it to get it done with.
Note: Valve adjustments are a back breaking job.....
Instructor
Joined: Jul 2013
Posts: 134
Likes: 16
From: Central Ohio
my 99 TL-P gets 380-400 hwy per tank using 93 octane, it needs plugs, CEL is on, 1/2" taller tires than stock (on TSX 17's), and 217K on the odo.... almost time for TB/Water pump, valve adjustment.... I baby it because its on its 2nd/3rd tranny, G'Ma was kinda fuzzy on the details when she gifted it to me in '11, so I drive a bit "scared" lol
Only engine mods are Stage 1 exhaust and CAI-why tempt fate and fiddle with near-perfection?
Only engine mods are Stage 1 exhaust and CAI-why tempt fate and fiddle with near-perfection?
Last edited by MrMoAcuraPar; Oct 12, 2013 at 09:56 PM. Reason: I'm a Dumbass and hit reply before my thought was finished.
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