TD New Guy
Join Date: Apr 2015
Location: Kingston, WA
My Ride: 90 Dakota w T swap
Thanked 0 Times in 0 Posts
Re: 2.5 T1 Air charge sensor
The regulator is a new one, but I had the problem before the new regulator also, which sorta made me rule it out. I went through and tried the "checking fuel pressure" steps to see where my problem might lie, and now my issue is blocking off the fuel lines. How is everyone doing it? I used a large set of vice grips and clamped down on the inlet hose, triggered the pump, and fuel pressure still got to the rail and then fell after turning off the pump. Then I tried a set of c-clamps to really get into it, and fuel pressure still got by, and proceeded to leak back down after disengaging the pump.... This happened on both the inlet and outlet fuel lines. I don't think i can get them fully closed by clamping, so im going to go out tomorrow and grab a check valve to throw in there. if that works, I'll know its probably the one in the pump thats off.
In other news, I managed to get the intake temp sensor installed and wired up. Engine light has gone away. On start up my af gauge is pegged lean, but im not sure if that's a warmup thing or something else. It goes to its regular 14-15 once there is some the in the engine, so im not all too worried about it. I don't think....
Ignoring the fact that the fuel pressure does not stay when its off, it does stay when its running, and builds with vacuum and such, so I took her around the block. Everything actually seems to be working fine. I didn't bring it past 5psi for breakin reasons, but fuel pressure gained, a/f ratios were looking good, and she seemed happy. I'm still going to try to get this fuel line test done, but my guess is the check valve in the pump. Not sure if the addition of the Air charge sensor made things run smoothly, but for now things look good.
Last edited by crashmasher; 12-17-2017 at 09:47 PM.