wierd gas mileage problem
#13
Member
Posts like a V-Tak
Join Date: Nov 2008
Location: Bremerton, Wa
Posts: 57
Likes: 0
Received 0 Likes
on
0 Posts
![SuperchargerHeaven is on a distinguished road](https://www.gmforum.com/images/reputation/reputation_pos.gif)
![Default](https://www.gmforum.com/images/icons/icon1.gif)
well you can listen for hissing while the engine is running or spray fuel injector cleaner, like carb cleaner but for fuel injected cars, around the hoses and listen to the rpm, if they pick up you found a leak. I would venture to guess its just running too rich.
#14
Retired Senior Admin
![](/images/badges/Gearhead.png)
Expert Gearhead
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Likes: 0
Received 29 Likes
on
25 Posts
![Danthurs is a name known to all](https://www.gmforum.com/images/reputation/reputation_pos.gif)
![Danthurs is a name known to all](https://www.gmforum.com/images/reputation/reputation_pos.gif)
![Danthurs is a name known to all](https://www.gmforum.com/images/reputation/reputation_pos.gif)
![Danthurs is a name known to all](https://www.gmforum.com/images/reputation/reputation_pos.gif)
![Danthurs is a name known to all](https://www.gmforum.com/images/reputation/reputation_pos.gif)
![Danthurs is a name known to all](https://www.gmforum.com/images/reputation/reputation_highpos.gif)
![Default](https://www.gmforum.com/images/icons/icon1.gif)
If you take a can of carb cleaner and spray it on the vac lines and connections when the engine is running the RPM will go up if you spray a leak. Also get the EGR tube.
#15
Retired Senior Admin
![](/images/badges/Gearhead.png)
Expert Gearhead
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Likes: 0
Received 29 Likes
on
25 Posts
![Danthurs is a name known to all](https://www.gmforum.com/images/reputation/reputation_pos.gif)
![Danthurs is a name known to all](https://www.gmforum.com/images/reputation/reputation_pos.gif)
![Danthurs is a name known to all](https://www.gmforum.com/images/reputation/reputation_pos.gif)
![Danthurs is a name known to all](https://www.gmforum.com/images/reputation/reputation_pos.gif)
![Danthurs is a name known to all](https://www.gmforum.com/images/reputation/reputation_pos.gif)
![Danthurs is a name known to all](https://www.gmforum.com/images/reputation/reputation_highpos.gif)
![Default](https://www.gmforum.com/images/icons/icon1.gif)
well you can listen for hissing while the engine is running or spray fuel injector cleaner, like carb cleaner but for fuel injected cars, around the hoses and listen to the rpm, if they pick up you found a leak. I would venture to guess its just running too rich.
That'* a good chance if the O2 sensor is real bad. That'* why pulling the plugs and inspecting them is a good idea.
Thread
Thread Starter
Forum
Replies
Last Post
Nashville Cowboy
General GM Chat
26
02-06-2007 05:23 PM
corvettecrazy
Everything Electrical & Electronic
6
10-12-2005 12:40 PM