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Todays gas is garbage. There are several brands that will stain the paint less then 30 seconds all are the reform summer blend. Yes the gas is the issue check your gas mileage lately? My gas mileage stinks in summer and gets much better in the winter. By the way I believe your pump is going bad My car did that several years ago and it was the holley pump going bad

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This is why I asked which pump he was using...........step up to a real capable pump that also can handle exotic fuels or in this case crap. I run the Magnafuel 300 series which is a direct bypass type so no long return runs and it dumps directly into the cell.

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I prefer to bypass mine as close to the carb as possible. Use short feed lines to the carb so the fuel does not have time to heat up before it gets to the bowls.

I can put my hand in the fuel cell and feel the warm fuel out the return. Sometimes, depending on the conditions the outside of my carb actually sweats from the combination of a hot motor and cool fuel

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I prefer to do the same on the return line(keep it
close to the carb)... when we first started injection
we returned from the front then a few years later
we changed to a return at the pump.. reason was cost..
we cut cost with no return line... but with higher
fuel pressures you dont run into vapor lock

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I know its not this fuel pump as it did not loose fuel pressure when it happened and the orange box works fine as it did not loose spark either and never has with that orange box. I agree MSD is better but that box has been on our cars since 2000 and never had a problem. I put the plastic filter on early this summer to see what was going on when it did die 3 times and that was a loss of fuel pressure so I ended up replacing that pump early this summer with the Holley red pump I had to see how it worked and it never had a fuel problem again. It was a Firecore pump that cut out early this summer and we are taking care of that. But I wanted to go to the track so I threw a Holley Black pump on with the external reg. Like I said it did not loose fuel pressure yesterday or at all with this pump on it. This is only the first time this has happened this summer. But last summer I had the fuel boiling happen twice. Since then I added the heat shield and a new phenolic spacer which I did at the end of last summer. Thats one of the annoying things is it dont happen all the time as I thought the heat shield helped but yesterday showed me it really did not. Ron

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I know its not this fuel pump as it did not loose fuel pressure when it happened and the orange box works fine as it did not loose spark either and never has with that orange box. I agree MSD is better but that box has been on our cars since 2000 and never had a problem. I put the plastic filter on early this summer to see what was going on when it did die 3 times and that was a loss of fuel pressure so I ended up replacing that pump early this summer with the Holley red pump I had to see how it worked and it never had a fuel problem again. It was a Firecore pump that cut out early this summer and we are taking care of that. But I wanted to go to the track so I threw a Holley Black pump on with the external reg. Like I said it did not loose fuel pressure yesterday or at all with this pump on it. This is only the first time this has happened this summer. But last summer I had the fuel boiling happen twice. Since then I added the heat shield and a new phenolic spacer which I did at the end of last summer. Thats one of the annoying things is it dont happen all the time as I thought the heat shield helped but yesterday showed me it really did not. Ron

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It is hard to imagine it getting that hot that the fuel boils at the carb, but you seem like a very sharp guy that has a handle on it. Hard to believe the top of that inner fender gets that hot as has been suggested. Perhaps try a temp gum to check out your underhood temps in various places underhood ?

Btw, nice sanitary work under the hood, what gears do you run ?

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