I had a starting problem where the starter would kick over for about 5 to 10 seconds before starting. I found that if I turned the key to on a few times before starting it would reduce the problem. Given that, I decided to plug in a fuel pressure gauge to find out what was going on.
Finally got around to plugging the gauge in today, and I found my problem. When I turned the car off after running it, I would lose all fuel pressure. So, with the fuel pump running, I went about clamping off the fuel line between the pump and the rail to see if the pump was maintaining back pressure. Found that it was. Meanwhile, the hose going from the clamp to the fuel rail had no pressure in it. So then I switched the pump back on and moved my clamp to the return line. The pressure on the gauge skyrocketed, I stopped the fuel pump, and decided that the regulator must be faulty. So I undid the clamp off the line, and hang on a second, the line is keeping pressure now! Started the car, stopped the car, line maintains pressure after being switched off. My starting problem is solved (or so far it seems to be!)
I think that the pressure put into the system by clamping the line freed something up, perhaps in the regulator. Any of you guys have any theories??
Second question. Now that I have the fuel pressure gauge installed I know what pressure I am running. My baby is an EL Fairmont Ghia, so the specs say that at idle I should be getting 250 kPa. In fact, I am only getting about 213 kPa
Car drives fine. Would there be any benefit in getting a new regulator so that I am running pressure back within specs?