Long cranking time. Suspecting low fuel pressure!!

[Stainbox12]

When i initially bought the car, i had a hard time to start it, i had to crank it 4 or 5 times. I took it to the mechanic, and we replaced the fuel filter. The problem stopped, and it was starting right away. I decided later on, to buy a walbro 190, i installed it, and the problem came back. Long time cranking. I read somewhere that the o-ring pops off, and it causses long cranking times. So i decided to take it out again, but this time, i added a fuel hose, attaching the pump and the fuel feed line, so i wouldn't be using the o-ring that previously made my car blow 3 pistons, because of low fuel pressure. The problem apparently came back, so i replaced the fuel filter again, and my fuel pressure solenoid is still in place. What i noticed is that, when i unscrew the fuel filter banjo, fuel comes out but, very slowly, so i suspect that the system is not keeping pressure, and that i have to crank several times in order to build it up again. I noticed that if im driving, and i turn off the car, and i crank again within 10 seconds, it will fire right away. I guess its because it has pressure still. So, i decided also to rewire the pump, hoping it would fix the problem, but it did not. What else can i try?

 

[JackM]

Just for kicks, you may want to check the two wires that go to the ECUs temp sensor in the t-stat housing. If they are broken, you will also have a hard time starting the car when cold. If that's not it, I'd attach a fuel pressure gauge to the system to see what is really going on...

Jack

 

[wolf20043]

Had the same problem on ours. Turned out to be an air leak in the lines allowing the fuel to bleed back to the tank and need to re-pressurize when trying to start it. Tightened everything up, and the problem was solved.
Mike