Daveb

I did it per the instructions. Been a while. Lol. It has a relay and bit as for connecting to the truck simply runs off the alternator wires and then the plug for the stock lift pump if I remember correctly. *but as for connecting to the truck.

I do not yet know. The gague says 15 from the second the cranking starts. But that's not an analog gague running off the fuel psi port. I'd rather check with a shop gague. It started up fine today. This is the first time I drove it since cleaning the breather last night. Let's see what happens.

Thanks for the reply. I do. It's saying I'm getting 15 psi. The other thing is when I got the airdog, it said I was running 19. I adjusted the airdog spring to knock it back to 15. I blasted out the overflow valve yesterday. It was very dirty and MAY have had ice. The vp is brand new. Literally. And the overflow valve on the return is too. Second vp, second valve. No change to the issue. I had exposed wires on the other one (had 16k) so I had them fix under warranty a couple weeks ago. Could the airdog valve be leaking off? When I took the little rubber ball out to adjust the spring I noticed that there was already a little ring on it from being pushed into the housing. It's only been on for a year. The other thing i noticed was that when this all started, the truck at first was flooding during starting. White creamy smoke with airdog at 19 psi. Although it ran fine all summer at 19. I adjusted the airdog to 15 psi, and now no smoke but still lots of cranking. One last thing you should know is that when I gas hard, the engine wants to die afterwards if I don't give it a little fuel for a couple seconds. Like there's no recovery from a hard pull. Do you think it could have anything to do with MAP or crank sensor? Thanks again for the help.

Hello there, so all day yesterday there was no pressure either direction from the fuel cap. It started right up at 22f outside with no issues after sitting all night. Drive it ten minutes. Shut off. Started back up perfectly. Drove home. Shut off. Three hours later started back up perfectly. Drove 20 mins. Shut off. Started back up. Shut off. 20 minutes later again and it started right up. This morning. Had issues starting up again. Drove ten minutes, shut off and heard the hiss again. It was windy outside so I couldn't tell if it sucked in or blew out when I loosed the cap. But there was a gasp of air. An hour later, it started right up!!!!! Erg this is annoying. To be honest, the issue only started happening when it started getting really cold. So it seemed that it was rubber contracting and leaking air? But then it was 50 out for a couple days and did it too so?? However, that doesn't explain the seemingly random perfect starts such as yesterday morning at 22f. It also started fine last week at random in 12f.

Well, I just drove it around town. Got home. Instantly pulled fuel cap and nothing. No push or pull. It's now starting to get intermittent. I swear it was under pressure last time I did that and it was hissing. It also was leaking fuel too. Granted I only drove for 10 minutes but that's been enough before. I guess I'll try again tomorrow. Is there a way to check the rollover valve? I mean this truck has 250k and is like 8 out of ten. I baby this thing since I got it, it looked stock before. No oil leaks. Starts up no issue in negative 15 Fahrenheit weather. I retorqed the head too for the heck of it. Got MAYBE an eighth of a turn on SOME of them. They are all now at 123 foot pounds. It barely EVER hits 1200 degrees. Only for a short tap once in a while. Usually cruises around at 600. Never given me issues till now.

Hey guys, did a little searching online and found this website. Maybe someone on here can help. Lately my truck has been making a hissing sound coming from somewhere around the sending unit/fuel lines. When it hisses, the truck cranks over about 10 seconds before it starts, like it's not getting any fuel. The airdog always runs 15 psi. The truck will always start right up within about 15 minutes of shutting it off. But if I let it sit for a few hours, it may or may not start right up. It also seems like this hissing sounds is related to starting. More of a hiss, the harder the start. Maybe I'm thinking too far into it. Has anyone ever seen this before?