fuel presssure

[tnt]

hello every one my 84 gn on start i get black smoke out the pipe and motor load's up went i drive slow or when i am at a stop lite ofr a long time my ? to u all what should my fuel pressure be and how can i tell if pressure reg on my car is the stock one or not?

 

[Chad Oliver]

Check out this diagram, the fuel regulator is #9. http://www.engraver1.com/help/intake2.gif it's from the sticky posted above. A stock fuel pressure regulator will be labeled Bosch 233.

 

[tnt]

thanks alot but i still need to know the stock fuel pressure.

 

[Wagondraggin]

about 30 psi at idle i believe..

 

[6SENSE]

Stock FP on a Bosch 233 regulator (what came on TRs) is 34-40 psi static (idle with the vac LINE OFF). A Bosch 237 regulator (what came on a TTA, and also considered a upgrade besides getting an adjustable) is 37-43 psi static. The FP reading you should be concerned with when adjusting is static fuel pressure. Amounts with the LINE ON may vary, but is usually about 6psi less than static, at idle. A good regulator should drop pressure with the line on, and as the engine builds vaccum. When building boost your FP should raise 1 psi for every pound of boost (at WOT FP should = static FP + boost).

 

[tnt]

thank's alot