Hello,
This is my first post here and I'm sure many will come. I bought a 1975 Cosworth this past Labor Day. I am the second owner with a GREAT paper trail! It was well maintained has about 75K and was not on the road since 1997. I got it running and on the road, runs very good, besides some clutch issues really not much to complain about, except.......
Here is my problem and or questionOn my first test drive after driving it 10 minutes or so I had shut it off, when I went to start it back up, it would start run and stall, gave the exact feeling of a car running out of gas, then it started and was fine. A few starts later same thing again, then like magic it started.
Then it ran fine for a couple of short trips next few days, then again, I was on the road an had my "road tool bag" with me. For some reason I saw a surgical clamp and I don't know why I did but I placed it on the return line of the fuel pressure regualtor and it started right up. With the purchase of the car a NOS fuel pressure regulator came along with it (as well as every other sensor, I know big time score!) Replaced it problem went away for a few days then back again, put the original back started right up, then it happened again. Sandy came lost power, went to Florida after the storm on business 6 weeks later I return drive the car no problem.
I have not placed a gauge on either side yet, only happens when it has been running, original fuel pum was replaced with a Porche pump by original owners son. I replaced the pump in tank with a Fierro pump (tank was spotless inside), filter was replaced. Cold Start valve is bypassed by me, it was leaking and was running a 3600 RPM when it was hooked up. The intermitent part is what is getting to me.........
Ideas?????
How does the regulator work the higher engine vacume the valve opens or closes?
Thanks