9 M.p.g????
Thread Starter
Burning Brakes
Joined: Dec 2003
Posts: 855
Likes: 0
From: Tampa FL
9 M.p.g????
Any ideas why my car is getting 8.9 - 9.4 M.P.G? It seems to be running good but first thing in the morning takes a min. to start and usually throws up the service engine soon light untill it warms up and I turn it off and bakc on.
Instructor
Joined: Jun 2003
Posts: 200
Likes: 0
From: Tempe AZ
I used to get about 28mph on the freeway, now I get 14mpg. Thing is, I know for a fact my fuel injectors are having problems. All of them. Maybe that would be a good place to start, by testing the injectors? I just haven't gotten around to (or able to afford) replacing mine yet.
Melting Slicks
Joined: May 2004
Posts: 2,524
Likes: 10
From: Lufkin Texas
St. Jude Donor '05-'06
Pull codes and let us know what you get. I tend to agree with Corvettaholic in that it's likely an injector issue. You may have one or more leaky injectors hence the hard starts when the fuel floods the cylinders and has to wash out before she fires. This will usually throw a code or two like for example a 45 for rich exhaust.
Thread Starter
Burning Brakes
Joined: Dec 2003
Posts: 855
Likes: 0
From: Tampa FL
I do ... use the gas to clean those lines out ha ha ha ha. but as far as the codes how do i do it? I don't have a tool and am not sure if it is like some vehicles where you turn the ignition on three times and wait for the blinking.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by pimpjames
I don't have a tool and am not sure if it is like some vehicles where you turn the ignition on three times and wait for the blinking.RACE ON!!!
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Melting Slicks
Joined: Jun 2004
Posts: 3,032
Likes: 4
You should post what year yours is in your post that would make things easier for us...
anyway- i see from your profile, you have an '86, L98... Find the diagnostic module below the drivers side dash. Take a paper clip, short the A and B terminals together. Turn the key to the Run postion <b>do not start the car</b>. You'll hear the fan come on and your check engine light will start to flash....
first code 12 three times...
*flash once* pause *flash thrice* (three times)
any code you get will appear next
it will finish by flashing code 12 three more times
the first group of flashes is the first number, the second group of flashes is the second number... i.e. 3 flashes, followed by 4 flashes woudl be a code 34...
good luck
anyway- i see from your profile, you have an '86, L98... Find the diagnostic module below the drivers side dash. Take a paper clip, short the A and B terminals together. Turn the key to the Run postion <b>do not start the car</b>. You'll hear the fan come on and your check engine light will start to flash....
first code 12 three times...
*flash once* pause *flash thrice* (three times)
any code you get will appear next
it will finish by flashing code 12 three more times
the first group of flashes is the first number, the second group of flashes is the second number... i.e. 3 flashes, followed by 4 flashes woudl be a code 34...
good luck