Mis fire after fill up
Thread Starter
Advanced
Joined: Dec 2001
Posts: 80
Likes: 0
From: Livingston Louisiana
Mis fire after fill up
Code P0300 running rough after fill up. Hadn't driven car for several months prior to this occurrence. Drove it 35 miles filled up then a mile later started with flashing engine light and running rough. What should I check first? Should I drain full tank or take to dealer?
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 481
From: OK
Put some Techron in the tank... Clear the codes... DRIVE it like you stole it... PULL THE CODES before you KILL the car and post them...
I wouldn't be surprised if your code and CEL disappear and don't come back....
oh yeah I forgot DO NOT TAKE IT TO THE DEALER for the love of pete....
I wouldn't be surprised if your code and CEL disappear and don't come back....
oh yeah I forgot DO NOT TAKE IT TO THE DEALER for the love of pete....
Last edited by 73Corvette; Jun 19, 2016 at 07:29 PM.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Likely crap gas. Had that happen when returning from the Corvette Museum with my old C4. Stopped in West Virginia and there were some guys on the front step of the station smiling as I filled. Left and then couldn't climb any of the hills in West Virginia (think those guys knew something was up with the gas). It was awful, had to use the right lane because I couldn't keep up with traffic on the hills. Re-filled in Pennsylvania after burning out the bad tank, ran like of dream after only a mile on the fresh fuel.
I would be suspicious of the fuel you just put in. You need to drive it out to find out. You could drain the fuel but that is a pain. Start with the simple solution, work from there.
I would be suspicious of the fuel you just put in. You need to drive it out to find out. You could drain the fuel but that is a pain. Start with the simple solution, work from there.
Last edited by vettenuts; Jun 20, 2016 at 07:53 AM.
Advanced
Joined: Dec 2015
Posts: 78
Likes: 5
From: Lawrenceburg Indiana
I had that happen, bad old gas and drove until 1/4 tank then refilled with Shell 93. After a few miles it started to run normal. I keep a bottle of Techron in the car and add to the fuel if using some "other" gas. Since, never an issue.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Just checked your page and the car appears stock. So barring other issues (noises, etc.) it may just be fuel. Does it skip all the time or only certain times, i.e., if you drive steady is it OK? Does it happen only when accelerating?
I would try to drive it while it is not skipping to get that tank down. You could also clear the codes and see if P0307 re-appears or whether it is a different cylinder.
Last edited by vettenuts; Jun 21, 2016 at 02:34 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 481
From: OK
