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EIS 4000 FP Scale Numbers

D

David-aviator

Well Known Member
I would call GRT but its the week end so maybe someone here has the info.

In checking the fuel system, fuel pressure reads -8 psi using scale numbers I have from a previous installation. That was with an earlier version of EIS.

Anyone here with EIS 4000, could you look up the AUX scale numbers for the fuel pressure sender? I know there are different transducers, but send what you have and I will try them.

Thanks.
 
Which resistor did you use? If you used the 475 Ohm resistor, then the settings would be:

0-15psi SF=51 Off=3 (1psi resolution)
0-28psi SF=59 Off=5 (2psi resolution)

(these numbers apply to 30psi sender only)

Both are forward-sensing.

Yahoo group has all these docs in the Files section, and after you determine which sender and resistor you used, you can determine which exactly SF and Offset to use.

HTH
 
Last edited:
Radomir said:
Which resistor did you use? If you used the 475 Ohm resistor, then the settings would be:

0-15psi SF=51 Off=3 (1psi resolution)
0-28psi SF=59 Off=5 (2psi resolution)

(these numbers apply to 30psi sender only)

Both are forward-sensing.

Yahoo group has all these docs in the Files section, and after you determine which sender and resistor you used, you can determine which exactly SF and Offset to use.

HTH
Click to expand...

The sender I am using is the "Bar 0-5" what ever that is. No resistor in the system except for the tach connections.
 
5 bar is approx 73psi...(I think that's the "80 psi sender") the above numbers should not apply. Not sure if you saw the note but connecting the exication voltage w/o resistor can damage the sender..

Try this link:

http://f1.grp.yahoofs.com/v1/YMjoSE...tHhG1fJeK15Fzzi3Y6dZm5KgYjvmXWu_8/OILPRES.pdf

if it doesn't work, go to http://groups.yahoo.com/group/GRT_EFIS/files/ and then choose OILPRES.pdf from the list.

With a 301 Ohm resistor (orange-black-brown-black) in line, you'd use SF=91 Off=15
 
Radomir said:
5 bar is approx 73psi...(I think that's the "80 psi sender") the above numbers should not apply. Not sure if you saw the note but connecting the exication voltage w/o resistor can damage the sender..

Try this link:

http://f1.grp.yahoofs.com/v1/YMjoSE...tHhG1fJeK15Fzzi3Y6dZm5KgYjvmXWu_8/OILPRES.pdf

if it doesn't work, go to http://groups.yahoo.com/group/GRT_EFIS/files/ and then choose OILPRES.pdf from the list.

With a 301 Ohm resistor (orange-black-brown-black) in line, you'd use SF=91 Off=15
Click to expand...

Thanks. I think you are on to something. It appears most AUX input devices need the 4.7 vdc input to excite them and the resistor is required to protect the unit. I have not done that. The 4.7v lead is not connected to anything at this point. The sender simply is not sending any information and its voltage is very, very low.
 
It works. :) Thanks for the help.

The kit included two 475ohm resistors with instructions on how to hook up the fuel level senders using them - no mention of a fuel pressure sender - so I ignored the plan.

But, having hooked up the fuel pressure sender 4 years ago with the Subaru H6 EIS 2000 install, my brain said hey, you've done this before. And I had, just forgot it.

At least the instrument now reads increasing and decreasing fuel pressure but the 92/15 numbers are not quite right. It starts out with -6 psi and runs up to 32. With the numbers adjusted to 99/5, it starts out at 1 psi and runs up to 31. That's probably close but I will call GRT tomorrow to make sure.

Again, thanks for the info....
 
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