1993 f150 fuel pressure check?
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Tuned
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1993 f150 fuel pressure check?
What is the best way check fuel pressure on a 4.9l with a single tank? I have a rough idle and have ruled out the ignition system and vacuum leaks. Next is fuel pressure. My truck runs very bad if i run it hard, turn it off for ten minutes or so, then turn it on again. Almost like it is running on 3 cylinders, and the more gas i give it the worse it sounds. I suspect that is aslo the fuel pump cuz i have replaced fuel filter. I have also listened to the injectors and they sounded good to me lol.
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Tuned
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How do you hook it up to the fuel rail? I was told that there isnt a schrader valve or anything. And 60psi? I thought is was about 32psi or something?
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Tuned
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Wow i didnt know that lol thanks. Do you know where the shrader valve is located and what size it is?
Fleet Owner
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From: Easton,Ks
The location of the TEST POINT (schrader valve):
The tester with an adapter to adapt to the schrader valve size of external thread of 0.305 inches outer diameter by 32 threads per inch (TPI), and it has a thread root diameter of 0.302 inches outer diameter. The valve also has an internal thread of 0.209 inches outer diameter by 36 TPI:
The self-test connector pointing out pin #6 to take to ground or to short to pin #2:
Location of self-test plug with pin #2 to pin #6 shorted:
/
The tester with an adapter to adapt to the schrader valve size of external thread of 0.305 inches outer diameter by 32 threads per inch (TPI), and it has a thread root diameter of 0.302 inches outer diameter. The valve also has an internal thread of 0.209 inches outer diameter by 36 TPI:
The self-test connector pointing out pin #6 to take to ground or to short to pin #2:
Location of self-test plug with pin #2 to pin #6 shorted:
/
Thread Starter
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Tuned
Joined: Sep 2015
Posts: 336
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The location of the TEST POINT (schrader valve):
The tester with an adapter to adapt to the schrader valve size of external thread of 0.305 inches outer diameter by 32 threads per inch (TPI), and it has a thread root diameter of 0.302 inches outer diameter. The valve also has an internal thread of 0.209 inches outer diameter by 36 TPI:
The self-test connector pointing out pin #6 to take to ground or to short to pin #2:
Location of self-test plug with pin #2 to pin #6 shorted:
/
The tester with an adapter to adapt to the schrader valve size of external thread of 0.305 inches outer diameter by 32 threads per inch (TPI), and it has a thread root diameter of 0.302 inches outer diameter. The valve also has an internal thread of 0.209 inches outer diameter by 36 TPI:
The self-test connector pointing out pin #6 to take to ground or to short to pin #2:
Location of self-test plug with pin #2 to pin #6 shorted:
/
So the shrader valve is located on the fuel rail towards the back of the engine?
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Fleet Owner
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From: Easton,Ks
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