Run On Problem.
Thread Starter
Melting Slicks
Joined: Nov 2001
Posts: 2,214
Likes: 0
From: Casa Grande AZ
Run On Problem.
Hi!
I took the 69 out for a maiden voyage this morning. Just a quick cruise around town and a stop at the gas station.
Anyway, I stupidly put regular unleaded in the car. Now I've got a huge run on problem. This isn't just the old 'rumble rumble die' it's hard to get the engine to stop! Anyway, what's my best bet here? An additive?
Thanks!
I took the 69 out for a maiden voyage this morning. Just a quick cruise around town and a stop at the gas station.
Anyway, I stupidly put regular unleaded in the car. Now I've got a huge run on problem. This isn't just the old 'rumble rumble die' it's hard to get the engine to stop! Anyway, what's my best bet here? An additive?
Thanks!
Race Director
Joined: Mar 1999
Posts: 10,258
Likes: 1
From: Calif.
Re: Run On Problem. (lbell101)
Run-on could be caused by:
Idle speed set too high or too much timing or (sometimes) shutting off the engine after a very short drive with the choke still engaged and the carb on "fast idle."
There are other things but these could be some places to start.
Idle speed set too high or too much timing or (sometimes) shutting off the engine after a very short drive with the choke still engaged and the carb on "fast idle."
There are other things but these could be some places to start.
Drifting
Joined: Mar 2001
Posts: 1,514
Likes: 1
Re: Run On Problem. (lbell101)
As space in the tank allows top off with higher octane. That might be all you need. As for additives I've heard so many positive/negative comments I don't know what to tell you on those.
Scott
Scott
Safety Car
Joined: Aug 1999
Posts: 4,862
Likes: 118
From: Texas
Re: Run On Problem. (lbell101)
I had the exact same thing happen last weekend with my '71. As soon as I filled up at a cheap gas station my car developed some dieseling. I attribute it to bad gas. High idle is usually the cause but it has not happened with my current set-up until I filled up with cheap gas.
To stop the run on just kill the engine while you are still in gear. I expect it to quit as soon as I get some good gas.
To stop the run on just kill the engine while you are still in gear. I expect it to quit as soon as I get some good gas.
Thread Starter
Melting Slicks
Joined: Nov 2001
Posts: 2,214
Likes: 0
From: Casa Grande AZ
Re: Run On Problem. (RatRacer)
Thanks guys!
I filled the tank up so adding higher oct gas wasn't an option. But I did add a bottle of "104 +" octane booster. The problem is no more!
I filled the tank up so adding higher oct gas wasn't an option. But I did add a bottle of "104 +" octane booster. The problem is no more!
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
Re: Run On Problem. (lbell101)
Unless your engine has been modified to a much lower compression than stock, it needs premium fuel. As already posted, idle rpm set too high will also cause run-on even with proper fuel. In any case, use premium instead of octane boosters + regular. The cost of octane boosters will be way more than the extra cost of premium. Who ever said that Corvettes were cheap to own? :)
Thread Starter
Melting Slicks
Joined: Nov 2001
Posts: 2,214
Likes: 0
From: Casa Grande AZ
Re: Run On Problem. (Vetterodder)
Ya - I know. I don't know what I was thining pulling up to the wrong pump. After I use some, I'll go put some super high octane gas in there. I think there's one station in town that sells the good stuff at $2.50 a gallon.
