everyone that has had head/valve issues

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everyone that has had head/valve issues

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everyone that has had head/valve issues - 11/18/2006 4:54:42 PM

importkiller

Posts: 7254
Status: offline

Did you notice poor gas mileage before you had the repair done? as you all know the best mileage I ever got 12 mpg and for the past month or so I am down to below 9 mpg. I just found out today that I have an engine misfire code from 280 miles ago, from reading all your posts it seems that almost all of you got the same code also. Just wondering if this could be the reason I have always got bad gas mileage.

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RE: everyone that has had head/valve issues - 11/18/2006 6:24:35 PM

LawWyfe

Posts: 1565
Joined: 11/15/2006
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Now we've got 3 "head/Valve" threads I have to keep up with? GRRRRRR Killer, I was on a trip when I had my prob happen - therefore I was checking gas mi. closely. I averaged approx 15-16 mpg the whole trip until I could get home to the dealership. 9-12 MPG OMG!!?? Uh could it be the way you drive? <just askin> If not..WOW how bad for you...might as well be gassin up that big ole #2 hog! (One big reason I chose to go 3..didnt want to go broke in gas alone!)

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2006 Hummer H3 Boulder Gray
Simple and understated and not all tricked out!
Sometimes less is better......OK...some BLING since I joined here!

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RE: everyone that has had head/valve issues - 11/18/2006 7:25:10 PM

importkiller

Posts: 7254
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I thought it was my style of driving because I hate getting passed

But when I was in the hospital a few weeks ago my wife was the only driver of the truck and she got 9.5 mpg for the entire week, so it can't be me. BTW...my wife drives like an old lady....well you know...like a woman

J/K!!

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RE: everyone that has had head/valve issues - 11/18/2006 9:49:30 PM

LawWyfe

Posts: 1565
Joined: 11/15/2006
Status: offline

Yeah, so does the hubby when he gets in it...so I don't let him drive it much![

< Message edited by LawWyfe -- 11/19/2006 9:06:39 AM >

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2006 Hummer H3 Boulder Gray
Simple and understated and not all tricked out!
Sometimes less is better......OK...some BLING since I joined here!

(in reply to importkiller)

Post #: 4

RE: everyone that has had head/valve issues - 11/20/2006 2:38:14 PM

beachman

Posts: 194
Status: offline

Below - find my mileage - do understand i fish on the beach, so mpg may be down due to the 4x4 factor... this is PRE-VALVE issue...

Just got H3 back POST-VALVE issue - so look out for the new miles...

257.6 miles 15 gallons
17.17 mpg 091106

213.9 miles 14 gallons
15.02 mpg 091806

188.4 miles 12.2 gallons
15.4 mpg 092406

162.4 miles 9.6 gallons
16.6 mpg 092106

186.8 miles 12 gallons
15.5 mpg 092306

227.5 miles 14.8 gallons
15.7 mpg 092606

13 gallons 202.9 miles
15.6 mpg

12.4 gallons 193.3 miles 100306
15.5 mpg

239.3 miles 15 gallons 100706
15.9 mpg

223.5 miles 14 gallons 100806
15.9 mpg

251.3 miles 101906 15 gallons
16.7 mpg

204.4 miles 102606 13.6gallons
15.0 mpg

234.9 miles 103006 15 gallons
15.6 mpg

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RE: everyone that has had head/valve issues - 11/20/2006 2:58:42 PM

importkiller

Posts: 7254
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wow..those numbers are alot better than mine ever were

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RE: everyone that has had head/valve issues - 11/20/2006 3:08:08 PM

beachman

Posts: 194
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Yeah, I am pretty psyched...

It is the 06' Adv and Lux package Automatic (kind of wish I had the stick)...

Was getting 13-14 with my LR

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Post #: 7

RE: everyone that has had head/valve issues - 11/20/2006 5:17:15 PM

AlanH3

Posts: 62
Joined: 3/19/2006
Status: offline

My mileage was slightly lower than average when my light came on. My lowest mileage was a few tanks before that, and I think that was probably still breaking in.

-Alan

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RE: everyone that has had head/valve issues - 11/20/2006 10:02:25 PM

importkiller

Posts: 7254
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I am actually hoping my heads go and soon...my mileage is terrible and getting worse and no dealer seems to be able to anything about it. they all just say...due to larger tires. I asked the last one if they could check the pcm and see if there is something out of whack or maybe flash it and i was told there is no flash available and that they couldn't do anyhting with 35" tires on it. I called three other dealers and they all gave me the same crap. I just filled up again tonight, went 187 on a full tank, filled up with 20.4 gallons---9.16 mpg...impressive.

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RE: everyone that has had head/valve issues - 11/20/2006 10:43:28 PM

Linus Gump

Posts: 960
Status: offline

What you might want to try, to prove your tires aren't the prime culprit in your mileage is to go out and get some cheap 33's to put on, run a couple of tanks through while keeping serious trak of your pre and post tire change fuel economy, then go in and say WTF with the 33's on.

Also, I was thinking, aren't you the one who only puts $20 in at a time, and only when the tank is empty? If so, try actually going from full to something less than full, then fill back up and not the mileage traveled. This will be more acurate then guestimating. If not, sorry for the confusion.

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RE: everyone that has had head/valve issues - 11/20/2006 11:20:13 PM

importkiller

Posts: 7254
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yea I normally only put $20 in at a time once the light comes on but I always fill it and test mileage twice a month or after a mod or repair is done. I do keep a log of mileage and I never got over 12.5 with the base tires (265's I think). My normal mileage was always around 10-11 mpg with the 265's. With the 35's it went down to 9-10 then I installed the k&n fipk and my mileage with 35's went up to close to 11. I got the check engine light a few weeks ago ( I posted about it when I got the light) ever since then my mileage has been back in the 9's. I just hope that if the motor does go it doesn't happen when my wife and son are in the truck.

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RE: everyone that has had head/valve issues - 11/21/2006 9:31:29 AM

beachman

Posts: 194
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Most of my driving quite the same, yet different, if that makes sense....

If I am not driving highway, then I am running it on the beach, 4x4 top speed at about 15MPH.

The fishing season is a bit done here in RI, so i will be able to get a true account over the next few weeks and will post.

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RE: everyone that has had head/valve issues - 11/21/2006 10:20:38 AM

AlanH3

Posts: 62
Joined: 3/19/2006
Status: offline

You have the misfire code and they won't check the heads and valves? That doesn't seem right.

In my case, I told the dealer the idle seemed odd and he said he couldn't do anything without a code. 100 miles later I had the code, took it back, and they immediately checked the valves.

Maybe tires can affect mileage? But they ought to at least check you engine.

-Alan

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RE: everyone that has had head/valve issues - 11/21/2006 2:16:20 PM

brachilius

Posts: 80
Joined: 7/11/2006
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Importkiller, there is something seriously wrong with your H3. I have nearly 26,000 miles on mine and get an average of 330 miles per tank full. This averages out to about 16.5 mpg. This is all in city driving. The best I ever got was 450 miles driving the PA turnpike. That is over 22 mpg. I would be bitching at the dealer big time for such ****ty numbers.

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RE: everyone that has had head/valve issues - 11/21/2006 2:51:56 PM

importkiller

Posts: 7254
Status: offline

I'll just wait for the motor to die then push it in front of a freight train.... I'll get an 07 with the insurance money

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