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 Tech question on fuel system
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craigztoyz



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607 posts
90 300ZX VH45 95 J30 90 rx7 lots of cars older then me.
Austin TX
1-18-2008

  Tech question on fuel system 12:59 PM 7/17/2008

Does the fuel system need to be pressurized to make the injectors fire? Some manufactures do, some don't. In the wiring I do not see anything that would do that, but trying to figure why I have no injectors firing.
Jeff Taylor

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59 posts
'96 240sx
Blacksburg VA
4-4-2006

 « Re: Tech question on fuel system (craigztoyz) 2:22 PM 7/17/2008

No. There is no pressure sensor on the fuel system that disables the injectors when no fuel pressure is present.

Make sure you are getting switched +12V to one side of the injectors.

Also, the injectors may be stuck shut. My VH45 had sat around for years without running and 6 of my injectors would not fire. To fix them, I applied 12V directly to each failed injector for a half a second. This freed them up for some reason.




Old news: KA24DET: 528wHP / 420 wTQ on STOCK internals
Current project: VH45DET w/ Garrett TV7512 in same car: 446wHP @ 6psi

Street Dynamics Racing
jetaylor@vt.edu
craigztoyz



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607 posts
90 300ZX VH45 95 J30 90 rx7 lots of cars older then me.
Austin TX
1-18-2008

 « Re: Tech question on fuel system (Jeff Taylor) 9:13 PM 7/17/2008

Thanx Jeff. Bad computer ground on something in the ecu system. redid grounds, and it works!! thanx again
 

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