Problem: loss of power when heating up - clues for the cause?

[Phil Waterman]

Originally Posted by Rhett Fisher

Hi Hanno.
Is the power loss accompanied by misfiring and maybe bangs in the exhaust, or does it just seem that you're driving with the brakes on?
Rhett. :-)

Hi Hanno

Rhett asks a very good question, dose it feel sound etc like the engine is getting tight or purely a doesn't want to run issue. Example does it still spin over on the starter and cold start speed?

Does the temp gauge show normal temp when this happens?

Will be very interested to hear what the eventual solution to the problem is, or will it be one of those strange old vehicle maladies that problem goes away but you can't put your finger on what was the cause or that it really ends up being several small things combining.

Cheers Phil

[Rhett Fisher]

If there isn't any misfiring, I would probably discount any ignition problems. From my experience, the flatheads are very susceptible to wear in the fuel pump mechanism i.e. camshaft lobe, pushrod and pump rocker arm etc. Also, a likely contender is the pump diaphragm which might be damaged by this ethanol that's been foisted on us in recent times- I've had to renew the one in my 1936 Austin 7 recently, as the old one had literally crumbled to pieces! Plus I have two motorcycles which I now can't use, as their GRP fuel tanks have gone soft and leak like sieves. Arrrrgh!
Rhett :-)

[Hanno Spoelstra]

Thanks for all the input, will get back on this later (currently suffering from the flu )

[Phil Waterman]

Hi Hanno

That's it the truck has the Flu, same symptoms tired lack of power. But kidding aside hope you and the truck are feeling better soon.

Cheers Phil

[Hanno Spoelstra]

Hi Phil,

Indeed my cough sounds like a bad misfire

My local American car specialist did take the time to look up the modern equivalent of the condenser part (will list it later here), contrary to the FLAPS. It was not on stock but we be early next week.

To be continued.

Hanno