poor Mileage

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poor Mileage

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Blazer >> Mechanical & Maintenance >> General Tech Help >> 2nd Gen (1995-2005) Tech >> poor Mileage

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poor Mileage - 4/27/2008 12:03:47 AM

ZL600A

Posts: 1
Joined: 4/26/2008
Status: offline

My 2000 LS 4X4 blazer has 97500 miles on it. It has run very good so far, I have underdrive pulleys for the crank and alternator, cold air intake and a magnaflow exhaust. These mods have been on the rig for about 4 years my highway mileage was about 23mpg hwy/ 17 city.
In the last 4 months my hwy mileage has dropped to about 17, city about 14. There are no check engine lights and the idle is still about 650 rpm, the engine still feels strong with no hesitation. The fuel pump was replaced in December, about a month after my mileage dropped noticeably. I am lost for the reason why mileage has dropped so significantly. Any thoughts would be appreciated. thanks
Al

Post #: 1

RE: poor Mileage - 4/27/2008 10:47:04 AM

rriddle3

Posts: 1311
Joined: 12/22/2006
From: Fort Worth,Texas
Status: offline

97,500 miles.
Tune up time= plugs, wires, distributor rotor and cap, and fuel filter.

_____________________________

2002 Blazer LS 4dr 2WD Auto Trans
Hypertech PP III Programmed
Flowmaster 50 Series Delta Flow Muffler, C6 Corvette Exhaust Tip
TYC Elegante carbon fiber tail lights

(in reply to ZL600A)

Post #: 2

RE: poor Mileage - 4/27/2008 11:05:37 AM

lennyblazer

Posts: 1985
Joined: 5/6/2007
From: Appleton, WI / Houghton, MI
Status: offline

Yeah I would say tune up time. That helped my mileage out.

Also this section of the forum is for introducing yourself and your blazer. This would get more response if put in the General Tech section.

_____________________________

-Lenny
4.3L Auto. 3.73Gears

http://www.cardomain.com/ride/2358267

(in reply to rriddle3)

Post #: 3

RE: poor Mileage - 4/27/2008 12:20:08 PM

swartlkk

Posts: 14299
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

I too would say that it is time for a good tune up consisting of plugs, wires, cap and rotor. Cleaning the MAF sensor and the EGR valve would probably be beneficial as well.

*Moving to 2nd Gen Tech*

_____________________________

Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to lennyblazer)

Post #: 4

RE: poor Mileage - 4/28/2008 5:27:15 PM

972DRBLAZER

Posts: 445
Joined: 10/30/2007
From: polk, fl.
Status: offline

first- welcome to forum
next-change air filter, let some air in that motor

_____________________________

97 BLAZER 4.3 2WD. HEADERS, CHERRY BOMB, 3.73 POSI, PORTED THROTTLE BODY, CAI, TBS, 3.5 MAF, ELECTRIC FANS, WAIT4ME TUNE, B&M STAGE 2 SHIFT KIT, HOLLEY IGNITION BOX & COIL, 160 THERMO, AND MORE.

(in reply to swartlkk)

Post #: 5