How long did it take to lose pressure? It was getting below 30 pretty quickly after I shut it off and after priming, and from there it continued to drop down slower.Over how long?
How long did it take to lose pressure? It was getting below 30 pretty quickly after I shut it off and after priming, and from there it continued to drop down slower.Over how long?
Within 5-6 seconds it would drop down to 30 and then continue to slowly trickle down in pressure. I didn’t have it hit zero but it was getting close to 10.seconds or minutes?
It was nearly cold when I did the test. I’ll rent the tester again tomorrow I guess cause I already returned it for the night.Try to see what the pressure does when you try to start cold, if it doesnt come up to 49, it maybe the issue.
That’s what I was thinking. Seems like to me it’s getting good pressure from the pump but isn’t retaining the pressure. First turn of the key I get perfect 49psi pressure, but it loses it quick. Running, 49psi. Shut the Jeep off and it loses that pressure again.If it pumps up on the first try of the key, that may not be your problem, if it takes a couple of tries, it maybe the regulator.
Shouldn’t the fuel rail keep constant pressure though, even when the Jeep is off? I’ll look into it more.It only needs to retail the pressure long enough to start, the pump runs for like 3-5 seconds, if pressure is up, then it will start, no pressure, no start. I may not be saying it right, try to google how the regulator works, but it needs the 49 psi to get adequate volume throuh the injectors to start the engine, once there is crank signal, the pump turns back on and continues to run until the engine is shut off.
I’m gonna start with fuel first. I can only imagine the quick loss of pressure before I even start the jeep must have something to do with it.. Won’t hurt to replace any of those things anyway if fuel isn’t the issue. Jeep could use a tune up lolI am thinking it is the check valve, but you want to check all possible causes. It could be a crank sensor, cam sensor, or a coil. I have had all of these cause intermittent cold starting problems along with a fuel pump. When you have problems, sometimes they just suck to troubleshoot.
You wouldn't happen to know the part no. for the Bosch unit would you? Or if there is a different number for different year ranges? I would like to try to source one if i can before they're all goneBosch is the best fuel pump replacement out there, but since they no longer make them, you have to look for them as leftover old stock (eBay usually has some).
However, Delphi I've heard good things about, and it's highly unlikely the fuel pump would fail again after 7 months. At that point it has to be something else I would assume.
You wouldn't happen to know the part no. for the Bosch unit would you? Or if there is a different number for different year ranges? I would like to try to source one if i can before they're all gone
disregard. panicked too soon. i figured it out, carry on
I grabbed 1 up as soon as I heard they are going extinct. Got it on Amazon. There were a few vendors that had them. This was 1 or 2 weeks ago. Hope that helps you find 1.