09 tuneup, now has horrible gas mileage

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chearn4522
Posts: 20
Joined: Thu Nov 15, 2012 4:46 pm

09 tuneup, now has horrible gas mileage

Post by chearn4522 »

we just did a tuneup on our 09 vibe 1.8L engine, changed spark plugs..( only 2 of the old ones were hand tight ) new serpitine belt, cleaned K&N filter and changed the oil...now getting horrible gas mileage...13 to 16 miles per gallon...HELP
My VIBE
K&N drop in
Konig Unknown 17
Goodyear Eagle GT 225 45 27
Tinted all the way..including brow
Leather Shifter to Match car
Short antenna
Painted Calipers
Custom Plates...MYVIBE
Viper 5901 remote start and alarm
....MORE TO COME......
Mark
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Joined: Sun Nov 02, 2008 7:26 am
Location: Cheyenne, WY

Re: 09 tuneup, now has horrible gas mileage

Post by Mark »

I would start by pulling the new plugs and verifying that they're the right ones, and make sure they all look like they're firing. Then make sure the coil packs are fully seated on the plugs. I guess I'd double check the belt routing and that I got the right belt. I've had parts stores give me the wrong one more than once. Throw away the KN filter and pick up a NAPA Gold or other other good quality filter. If everything checks out try disconnecting the negative battery terminal for 20-30 minutes to reset the computer.

I'd change the air filter and clean the MAF too, unless that's been done recently.
'08 Base Stealth, '05 Base Satellite
Caretaker

Re: 09 tuneup, now has horrible gas mileage

Post by Caretaker »

As a Corolla Vibe owner myself, I can only offer a suggestion of the obvious:

Did you order the $9 Denso iridium plugs from Rock Auto, or did you put in some two pronged E3 plugs that belong in lawn mowers? If you did not put in the NGK or preferably the Denso plugs, please do so and report back. I'm hoping that is all there is to this. Good luck.
Salsa Guy
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Re: 09 tuneup, now has horrible gas mileage

Post by Salsa Guy »

Yep Check plugs first then air filter
05 Matrix XR 4WD and 03 Vibe GT
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triz
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Re: 09 tuneup, now has horrible gas mileage

Post by triz »

Would not be a bad idea to unhook the battery for a few minutes and let the computer relearn.
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Mark
Posts: 640
Joined: Sun Nov 02, 2008 7:26 am
Location: Cheyenne, WY

Re: 09 tuneup, now has horrible gas mileage

Post by Mark »

Forgot to mention another obvious culprit: tire pressure. With the stock 205/55 tires on mine it's really almost impossible to spot a tire that's down to 20psi just by looking. But boy can that suck the mileage down.
'08 Base Stealth, '05 Base Satellite
ParknVibe
Posts: 563
Joined: Sat Jul 19, 2008 5:38 am

Re: 09 tuneup, now has horrible gas mileage

Post by ParknVibe »

Mark wrote:Forgot to mention another obvious culprit: tire pressure. With the stock 205/55 tires on mine it's really almost impossible to spot a tire that's down to 20psi just by looking. But boy can that suck the mileage down.
Yes,... always check your tire pressure!!! ...at least once a month,
cptnsolo77
Posts: 1645
Joined: Sun Jul 29, 2007 4:05 am

Re: 09 tuneup, now has horrible gas mileage

Post by cptnsolo77 »

Possible the K&N was over oiled ?
* 2003 Vibe Auto Satellite Silver w / Moons & Tunes
* Kenwood Excelon KDC-X597
* Polk DB651-Speakers
* Soundproofcow Roadblock R sound deadening in all doors
* Drop In K & N Filter
* NGK Iridium IX Plugs
* 27 MPG City/Highway with AC on
tpar1220
Posts: 48
Joined: Mon Sep 08, 2014 6:32 am
Location: martinsville (ish), in.

Re: 09 tuneup, now has horrible gas mileage

Post by tpar1220 »

cptnsolo77 wrote:Possible the K&N was over oiled ?
i was thinking this very thing. on my dirt bike, if i over oil the filter it will foul plugs left n right!
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chearn4522
Posts: 20
Joined: Thu Nov 15, 2012 4:46 pm

Re: 09 tuneup, now has horrible gas mileage

Post by chearn4522 »

re-checked the plugs...denso iridium, coil pacs look good, changing out the K&N for Napa Gold today, have the oil re-checked today also as well as tires rotated..will get back with y'll .....ty for all the help...
My VIBE
K&N drop in
Konig Unknown 17
Goodyear Eagle GT 225 45 27
Tinted all the way..including brow
Leather Shifter to Match car
Short antenna
Painted Calipers
Custom Plates...MYVIBE
Viper 5901 remote start and alarm
....MORE TO COME......
cptnsolo77
Posts: 1645
Joined: Sun Jul 29, 2007 4:05 am

Re: 09 tuneup, now has horrible gas mileage

Post by cptnsolo77 »

cptnsolo77 wrote:Possible the K&N was over oiled ?
You may have to clean the MAF sensor if it was over-oiled.
* 2003 Vibe Auto Satellite Silver w / Moons & Tunes
* Kenwood Excelon KDC-X597
* Polk DB651-Speakers
* Soundproofcow Roadblock R sound deadening in all doors
* Drop In K & N Filter
* NGK Iridium IX Plugs
* 27 MPG City/Highway with AC on
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vibrologist
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Location: Iowa

Re: 09 tuneup, now has horrible gas mileage

Post by vibrologist »

Use paper towels to blot off any extra oil on the K&N.
Vibrologist
'05 Vibe

"It is important to know the difference between 'accurate' and 'precise' even if you are neither!"

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triz
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Joined: Mon Jun 03, 2013 9:11 pm
Location: Gulfport, FL
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Re: 09 tuneup, now has horrible gas mileage

Post by triz »

Did you reset the computer to allow it to relearn?
http://lubedealer.com/mr2ner/home.aspx Please use ZO#5172967
Member discounts when you sign up as Preffered Customer. New Amsoil Customers only
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