Starving Under Load? Options

[kenshapiro2002]

Just brought the green machine back from CT this afternoon. After filling her up, she started to starve under load (trying to accelerate above 3,500 RPM...getting up a hill, etc.) so badly at one point I had to pull off the highway...she was dying. After sitting for 10-15 minutes, she fired up and was alright for another half hour. Then it all repeated. After the second rest she made it all the way back to Baltimore and ran beautifully for 90% of the time. I could sense a little starvation once in awhile.

I'm a shade tree mechanic at best, but my guess is that even though the seller (A Porsche tech) said the fuel tank was amazingly clean and needed nothing after being stored for 20 years, the fuel filter was getting clogged, and perhaps sitting for a while let things "settle". The seller suspects points. Any opinions?
Thanks in advance,
Ken

[Eddie914]

"After filling up" .... Bad gas? It will not be the first time. Drain/pump some of the gas out and put it in a clear container. Look for any separation. Perform a quick smell test.

A clogged fuel filter is not uncommon on a vehicle that has been sitting for a long time. Condensation can result in water in the fuel. I always put a can or two of can dryer in the fuel of my vehicles that have been sitting (like through the winter).

My motorhome (carbed Chevy 454) exhibited the same symptoms - clogged fuel filter.

My BMW M5 exhibited the same symptoms - worn plugs, cap & rotor.

My Chevy Suburban (TBI 350) exhibited the same symptoms - worn cap & rotor.

When my vehicles start running poorly the culprit is USUALLY ignition related ... but since your teener started running poorly after a fuel fill up ... check the fuel system.

Eddie

[kenshapiro2002]

Eddie,

Here I am , three months later, to tell you "You Win". After fixing everything electrical, and rebuilding the carbs, it finally got "healed" after a can of Valvoline Dry Gas and a can of Sea Foam (probably the dry gas did it all by itself). I knew that the fill up half the way home was the culprit, but other theories about the new gas flushing out old crap never bore fruit. I'm changing the sock and fuel lines, and pump next week, but right now she's running beautifully...finally...after some Dry Gas.

"After filling up" .... Bad gas? It will not be the first time. Drain/pump some of the gas out and put it in a clear container. Look for any separation. Perform a quick smell test.

A clogged fuel filter is not uncommon on a vehicle that has been sitting for a long time. Condensation can result in water in the fuel. I always put a can or two of can dryer in the fuel of my vehicles that have been sitting (like through the winter).

My motorhome (carbed Chevy 454) exhibited the same symptoms - clogged fuel filter.

My BMW M5 exhibited the same symptoms - worn plugs, cap & rotor.

My Chevy Suburban (TBI 350) exhibited the same symptoms - worn cap & rotor.

When my vehicles start running poorly the culprit is USUALLY ignition related ... but since your teener started running poorly after a fuel fill up ... check the fuel system.

Eddie