fuel milage problems - Nissan Frontier Forum
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#1 (permalink) Old 01-08-2013, 12:02 AM
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fuel milage problems

I have searched this section and had no luck. I was hoping someone could give me some help. i have been getting relly bad gas milage lately and im not sure why, or if there is anything i can do to improve it. I used to get abour 17 and now im down to about 14.

I have an 03 3.3l cc with 120,000 miles.
I had the timing belt and all hoses replaced about 10,000 miles ago.
It gets regular oil changes and has a new air filter.
I also got new tires and have them serviced regularly too.

This truck has also been getting a little slugish and i try really hard not to step on it to bad, but its just not like it once was.

any help would be greatly appreciated.

03 frontier XE crew cab
03 ford ranger
06 buell xb9r (firebolt)
95 ford escort gt (turbo)
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#2 (permalink) Old 01-08-2013, 12:59 AM
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What condition is your distributor in? Spark plugs? Any hesitation/misfiring occuring?

2000 Silver Frontier, SE 4x4 V6 Crew Cab (5spd) - 309xxx km and counting!
2014 Cayenne Red Xterra Pro4X (6spd) - 800km!
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#3 (permalink) Old 01-08-2013, 01:03 AM
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i dont think so, when it was in the shop for the timing belt they said everything else looked good.

03 frontier XE crew cab
03 ford ranger
06 buell xb9r (firebolt)
95 ford escort gt (turbo)
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#4 (permalink) Old 01-08-2013, 01:09 AM
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is there anyway i can change the gearing on it. if i put the cruse on at 70 or more it down shifts alot to maintain the speed and its running hard at 3000+ rpm's. If I could keep it at higher speeds and lower rpm's like most cars I think that would help. my wifes v6 chevy trailblazer runs 75 at 2000 rpms on cruise.

03 frontier XE crew cab
03 ford ranger
06 buell xb9r (firebolt)
95 ford escort gt (turbo)
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#5 (permalink) Old 01-08-2013, 01:24 AM
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Do you have a supercharger? Check for a knock sensor code. I've read that other people with automatics have noticed a lower cruising rpm with a new (working) knock sensor.
I have a manual so it didn't anything with cruising rpm (obviously). I am at about ~2800 rpm when at 70mph, if I remember correctly

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2014 Cayenne Red Xterra Pro4X (6spd) - 800km!
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#6 (permalink) Old 01-08-2013, 06:29 AM
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The change didn't occur after the timing belt replacement, did it? If so, they may have messed up the timing.

Fuel filter? Exhaust restriction (converter)?


Jerry
2004 Frontier, King Cab, XE, 4-cyl, 5-spd, 4x1
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#7 (permalink) Old 01-08-2013, 06:12 PM
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thanks for the replys guys.
it does not have a supercharger, does the non s/c have a knock sencor too?

the gas milage was fine after the timing but the power loss seams to have been fading for a while.

03 frontier XE crew cab
03 ford ranger
06 buell xb9r (firebolt)
95 ford escort gt (turbo)

Last edited by joeseabee; 01-08-2013 at 06:20 PM. Reason: spelling
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#8 (permalink) Old 01-08-2013, 09:57 PM
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Quote:
Originally Posted by joeseabee View Post
thanks for the replys guys.
it does not have a supercharger, does the non s/c have a knock sencor too?

the gas milage was fine after the timing but the power loss seams to have been fading for a while.

Yes your non s/c 3.3 has a knock sensor. Have somebody read your trouble codes. It is a common problem for them to go bad. This WILL NOT make your SES light come on.

Also you may want to check all your oxygen sensors for proper operation.
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#9 (permalink) Old 01-08-2013, 10:43 PM
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thanks for the input guys. keep it coming, I have a friend that is a michanic im gonna see what he can look up for me.

03 frontier XE crew cab
03 ford ranger
06 buell xb9r (firebolt)
95 ford escort gt (turbo)
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#10 (permalink) Old 01-09-2013, 01:27 AM
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Although I had a faulty knock sensor and I did the relocation mod (see the sticky at the top of the page), I didn't notice a big difference in fuel mileage with a working knock sensor.
The s/c guys notice a difference in performance though.

2000 Silver Frontier, SE 4x4 V6 Crew Cab (5spd) - 309xxx km and counting!
2014 Cayenne Red Xterra Pro4X (6spd) - 800km!
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