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fuel in vac. lines @ vac.manifold/ pcv outlet
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susie
New User
Jun 17, 2008, 5:26 PM
Post #1 of 2
(1032 views)
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fuel in vac. lines @ vac.manifold/ pcv outlet
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Can you help?? Our '92 mazda navajo 4.0 ltr v-6 push rod has developed a problem in the vac./fuel system.
The engine light came on two days before this problem started. We drove a few miles [motor was warm;w/no engine lt.] and parked it . A couple hours later it seemed to be a battery/starter problem;starter shorted out and smoked at the pos.connection at the starter,no problem! Replaced the starter on the spot and it cranked over fine but would not fire. If i pushed on pedal it would sputter a bit,but would'nt fire. We could smell fuel pretty strong and thinking there may be a vac.line off or loose, I pulled a 1/4"or 3/8" vac line off at the small vac.manifold, where 3 or 4 seperate small hoses connect
[including the pcv hose and a hose from the brake booster] on the left side of the intake manifold directly over the pcv valve, and when I did pull off a hose, fuel pours out of the hose. This happens each time I crank the motor over.[no start] Long winded but I really need some help on this one!!!
Thanks for any and all advise you can give...RTM
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Double J
Veteran
/ Moderator
Jun 17, 2008, 7:59 PM
Post #2 of 2
(1027 views)
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Re: fuel in vac. lines @ vac.manifold/ pcv outlet
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One thing that comes to mind is the fuel pressure regulator.
You can pull the hose off the regulator and if fuel is present in the vacuum line there,the regualtor is faulty and needs to be replaced.
I dont know how much automotive repair knowledge you have,but I an concerned about you working on this with that much fuel present in the vacuum lines and shorts/smoking wires at the starter and such..
This is a very dangerous situation you have here,something that im sure you already know.
I urge you,if knowledge is limited,to stop cranking it any more,and have it towed to a qualified repair shop.
Disconnect the battery negative cable as well to disable the electrical system.
Here is a picture of the Pressure regulator..
Here is a link to the vacuum diagrams...The very bottom one is sorta generic but does show the FPR connected to the manifold source and brake booster as you mentioned...
click here
Hope this helps
Be careful..Work At YOUR OWN RISK!
Jim
(This post was edited by JIM N on Jun 17, 2008, 8:07 PM)
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