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post #1 of 18 (permalink) Old 03-31-02, 06:49 PM Thread Starter
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Efi Question for XR9UTE aka pete

Heres a question for all you technical die hards that would have to know everything about efi(or at least one thing..)

Does anybody know how many mL of fuel passes through a fuel injector before a pulse is given to the trip computer on an XF fairmont ghia??? Or how many pulses it gives after 0.1 litres??

The reason for the question is that I have the trip computer on an XF with no efi and hence the fuel part doesn't work as it should. And i recently found a fuel flow sensor that you put in series with your fuel line and it produces 780 pulses every 0.1 litre. Would this work if I bought it. Its a costly little device at $130 + $11 shipping. I don't want to waste that money. Either way its cheaper than fitting EFI.

Cheeeeeers

matt


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post #2 of 18 (permalink) Old 04-02-02, 07:27 AM
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Don't know about the XF but the EA to ED Ford Manual says of testing the trip computer using the Ford diagnostic unit ".... the tester presents to the trip computer a constant pulse frequency of 30 Hz at 7.5 milliseconds simulating constant fuel consumption."

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post #3 of 18 (permalink) Old 04-02-02, 07:58 AM
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Hmm and Probst book says in a typical SFI Ford at 60 mph 0.0015 kg of fuel is burned per second and each injector gives 16 pulses per second. He also says MPEFI may fire 4 times as often and deliver 1/4 as much fuel per second. Doesn't answer your question but if you know how much a litre of fuel weighs it might tell you if you are within cooee.

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post #4 of 18 (permalink) Old 04-02-02, 08:01 AM
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See http://www.users.bigpond.com/INTERJECT/MEMBERS.HTM
Falcon XE. (MAP) 250=300 kpa. 130 ltr/h 11-14 cc/min
Falcon XF EST (MAP) 240=290 kpa. 120 ltr/h 10-11 cc/min
Falcon XF Leaded (MAP) 220=280 kpa. 110 ltr/h 11-15 cc/min
Falcon XF Unleaded (MAP) 220=380 kpa. 120 ltr/h 11-15 cc/min

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post #5 of 18 (permalink) Old 04-02-02, 08:51 AM
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I give up; a very good question I can't find an answer to. Some of the docs here: http://www.acc-electronics.com/cloud/tc_eec.htm might hold the answer. And this guy may know: http://acc-electronics.com/cloud/efi/amarch/eec.

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post #6 of 18 (permalink) Old 04-03-02, 02:12 AM Thread Starter
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Thanks for those replies AB. I should be able to put some of that information to good use.

Cheers

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post #7 of 18 (permalink) Old 04-03-02, 07:00 AM
XR9UTE
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Hi Matt,

Well we could hang a CRO of the DOL pin and see what we get.
Then I could could hang a Pseudo encoder off the EEC Fairmont Ghia and crack the VAF open a tad and measure the injector pulse width. That would give us a DOL vs mS function.

Or you could just forget it because it doesn't make any hp. (giggle)

Pete.
 
post #8 of 18 (permalink) Old 04-03-02, 10:23 PM Thread Starter
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Quote:
Originally posted by XR9UTE
Hi Matt,

Well we could hang a CRO of the DOL pin and see what we get.
Then I could could hang a Pseudo encoder off the EEC Fairmont Ghia and crack the VAF open a tad and measure the injector pulse width. That would give us a DOL vs mS function.

Or you could just forget it because it doesn't make any hp. (giggle)

Pete.
CRO??? DOL??? Can you translate that to english??

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post #9 of 18 (permalink) Old 04-05-02, 06:15 AM
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CRO - Cathode Ray Oscilloscope
DOL Don't know perhaps mistyped DIL pins -DIL (Dual-In-Line)
Two parallel rows of connection holes on a PCB. Also refers to the type of connector needed with this array. or perhaps mistyped DIP pins.

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post #10 of 18 (permalink) Old 04-05-02, 06:18 AM
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DOL Hmmm Diognostic Output Line?
DOL Dodgie Old Link?

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