Fuel Pressure regulator AGAIN!

[94Roadster]

About a month ago my 94 Roadster with the LT1 wouldn't pop right of and start. So I bought a fuel pressure regulator gauage and watched the fuel pressure at 40 PSI and then when I shut the engine down, the pressure dropped as fast I could count down! I then unplugged the vaccum hose from the fuel pressure regulator and it just poured out gas. So I replaced the regulator and it then start perfect.......for about a month. Tonight I put the gauage back on and it while running the pressure was at 40 PSI and when I turned off the engine the pressure stayed there about 45 seconds and then dropped to about 38 PSI. I pulled the vaccum hose off and gas was pouring out again! It looks like I have another bad regulator. My question is: What is causing my fuel pressure regulators to go bad? It's a Bosch part and they aren't cheap. Is there something else I need to check before I put another regulator in? Did I just get lucky and have the new one go bad? Help!:confused

 

[grapeknutz]

My take is the injectors are leaking down, how many miles are on the engine ?

 

[94Roadster]

35K, The motor runs fine once started

 

[94Roadster]

If the injectors were leaking then why would I have fuel on the vaccum line side of the fuel pressure requlator?

 

[grapeknutz]

Yeah that does sound like a tear in the diapham!

 

[94Roadster]

I'm pretty sure that's the problem but what's causing them to go out? That's two this summer? Is there too much pressure?

 

[grapeknutz]

Let me put it to you like this, I would not stand next to you in a lighting storm!

 

[WhalePirot]

Call the boys at TPIS in Chaska, MN. http://www.tpis.com/

Fuel pressure is unlikely as the cause of your diaphragm failures.