i suppose that means replace the diaphragm or regulator assy...

i have an adjustable holley (p/n 512-501) on there right now but why would that be (supposedly) for the 5.0L only when the pressure band is 35-65 and a 5.7L runs about 43ish... same fuel rail... apparently they have no tech line to answer the question, either?

 

Diaphragm is split or broken
All TPI's run the same pressure; 39psi @ idle, vac connected , 43ish with vac line disconnected
The different size of the injectors (19 vs 22lb ) controls the amount of fuel supplied

 

Probably because they introduced it in 85 when there WAS NO 350 in these cars, and never bothered to update the catalog listing after the 350 appeared.

As said however, they're the same. There's no difference in any of the TPI mechanical components in any given year between when it's on a 305 and when it's on a 350. All the same.

Yes it's definitely broke. Get a new one.

 

yea, i guess they are behind the power curve on that one... just wondered cuz that is the afpr i have on my 5.7... took it off today and the diaphragm was deteriorated so yea, it would leak. saved a couple of bux thru advance auto, tho, with 20% off. better than nothing! and i was so close to getting that thing out of the garage finally - maybe next weekend now...