[toobroketoretire]

I have had an unusual problem ever since I installed my Edelbrock and #3310-2 Holley. After one month of light-throttle cruising I get an ENORMOUS loss of power for 5-6 seconds when I open my secondaries. I have a gut feeling the fuel in the secondary bowl is "going bad" and is the reason for the enormous loss of power. Once I have experienced that 5-6 second loss of power all things return to normal and stay that way for at least a week.

So my question is this: At what point does our fuel go "bad"? The fuel stored in a non-vented tank is kept pretty cool and mixed with a lot of other fuel but the 3 ounces of fuel in a vented secondary bowl is stored in a real hot 200-250 degree environment. So at what point can that 3 ounces of fuel go "bad" enough to the point in which it won't ignite under high cylinder pressures?

I recently installed a 1/8" copper line joining my secondary bowl to the suction line and the problem hasn't surfaced since. So I'm wondering if "bad" fuel was causing it.

Any thoughts?

[Slicktop]

Did you ever stop to think that since you are the only one in history to experience this that YOUR carb is screwed up.........gas does not go bad in the short time span that you are talking about, period..........

[toobroketoretire]

Originally Posted by Slicktop

Did you ever stop to think that since you are the only one in history to experience this that YOUR carb is screwed up.........gas does not go bad in the short time span that you are talking about, period..........

Slick, if you'll reread my post I asked the question "at what point does fuel go bad in which it won't light off under high cylinder pressures".

[Slicktop]

Originally Posted by toobroketoretire

Slick, if you'll reread my post I asked the question "at what point does fuel go bad in which it won't light off under high cylinder pressures".

Like I stated in your previous thread cars in storage for 6-12 months start and run fine and those engines also have "high cylinder pressures".

Also, if you buy gas at a rural station that gas could have been in the stations storage tank for a long time.........

Contact the experts, your favorite gas company, when they mix their fuels they do extensive testing and might have further insight into your "problem".

[toobroketoretire]

Originally Posted by Slicktop

Like I stated in your previous thread cars in storage for 6-12 months start and run fine and those engines also have "high cylinder pressures".

3 ounces of fuel stored in a vented bowl and at temperatures of up to 250 degrees is a lot different than 15-20 gallons of fuel stored in a un-vented gas tank at ambient temperatures.

[toobroketoretire]

Originally Posted by Slicktop

Also, if you buy gas at a rural station that gas could have been in the stations storage tank for a long time.........

My local gas station is a Vallero that has 10 pumps and gets a load of fuel most every day.

The first time it did it I assumed my plugs had gotten fouled from all the low speed low rpm driving I do so Fish sent a pair of #70 jets to me so I could lean it down about 5%. But after another month of low speed low rpm driving it did it again. And each time the whole "event" lasts about 5-6 seconds. Once the event happens it'll run perfectly for at least a week when it begins to exhibit the same symptoms but not nearly as bad. Feels just like a 5-6 second loss of fuel pressure. And when it does it I can't feel any missing....................just an enormous loss of power.

[fishslayer143@yahoo.com]

Originally Posted by Slicktop

Did you ever stop to think that since you are the only one in history to experience this that YOUR carb is screwed up.........gas does not go bad in the short time span that you are talking about, period..........

if it is a carb malfunction, why does it only do it once, then operate perfectly fine afterwards? and then wait a month before doing it again and only if you don t use the secondaries during that month? ...that is the mystery.. I took the problem directly to Holley.. they cannot explain it either.

[toobroketoretire]

Originally Posted by fishslayer143@yahoo.com

if it is a carb malfunction, why does it only do it once, then operate perfectly fine afterwards? and then wait a month before doing it again and only if you don t use the secondaries during that month? ...that is the mystery.. I took the problem directly to Holley.. they cannot explain it either.

I have a feeling it's just fouling on the plugs and it takes 5-6 seconds to burn it off. Because I recall my '82 doing the exact same thing after extended low speed driving.

[Slicktop]

Well, then we are back to a discussion about plugs. In 1965 I bought an Austin Healey 3000 and it continuousy fouled American plugs. Parts guy suggested trying NGKs, saying that they would not foul easily and if fouled would clean up under acceleration. Guess what, he was right and I have been using NGK plugs ever since with never a fouled one in all types of cars. We are talking about regular NGKs, not platinums, etc. The regular NGKs have a wide flashpoint and a copper core and just do the job. Try a set.

[fishslayer143@yahoo.com]

maybe you just need to go one heat range hotter , since you mostly drive low rpm anyway