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Subject Topic: Poor fuel mileage Post ReplyPost New Topic
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truckerwillie
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Posted: Oct 11 2017 at 5:20am | IP Logged Quote truckerwillie

Mileage has been about 15 around town. Just bought the 2004 Frontier
4 cyl 5 speed. The a/c compressor operates all the time on any setting.
Set on heat only, the ac cycles on and off. I believe the dealer does not
want to fix it.

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lakota
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Posted: Oct 11 2017 at 2:47pm | IP Logged Quote lakota

..

The A/C system can lower the fuel mileage up to 3 mile per gallon.

It could be an expensive computer problem. One could wire in a switch on the dash to the wire feeding the clutch and manually control it. The clutch is the disc in front of the pump,look for a black wire going to it.

Designed over use of computers is a big problem. I dislike computer controlled automatic transmissions and a few other stupid ideas.

Good Luck.. Don S..


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'99 4x4 3.3 Frontier Se KC Auto, 48,000 miles
'76 4x4 401 Wagoneer QT
'04 FWD 1.8 Sentra '08 FWD 2.4 Camry LE
Fort Worth
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truckerwillie
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Posted: Oct 11 2017 at 6:27pm | IP Logged Quote truckerwillie

Thanks for the reply. If I cannot fix it properly , I will switch the system
off as you suggested.
TW

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truckerwillie
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Posted: Oct 30 2017 at 9:17am | IP Logged Quote truckerwillie

Disconnecting the a/c clutch improved fuel mileage much. I installed a
new fan resister and got #2 fan speed working. I hoped that would fix
the a/c clutch problem also. Not. Any other ideas. I have unplugged the
clutch. However, the idle speed increases as if the a/c was requested.
Truckerwillie


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lakota
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Posted: Oct 30 2017 at 3:17pm | IP Logged Quote lakota

..

You would have to reprogram the computer...

If I could have done that I'd be making twice the retirement income.

It could be a ground problem, in the switch or computer.

Dang... I knew everything when I was a teenager.. Don S..

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PLEASE >>> A SIG similar to mine can be VERY HELPFUL to all the members!
'99 4x4 3.3 Frontier Se KC Auto, 48,000 miles
'76 4x4 401 Wagoneer QT
'04 FWD 1.8 Sentra '08 FWD 2.4 Camry LE
Fort Worth
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