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Fuel pressure sender

Posted by Skye 
NoCoast
Grant Hughes
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Re: Fuel pressure sender
February 23, 2006 09:30AM
What are you going to run for engine management?



Grant Hughes
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Denver, CO
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sagsert
Mustafa Samli
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Re: Fuel pressure sender
February 23, 2006 10:17AM
Pectel of course smiling smiley

Sorry Skye, I had to.




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M.Samli
Phoenix AZ
Gaylant VR4
EVO III GSR (Stolen)


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derek
Derek Bottles
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Re: Fuel pressure sender
February 23, 2006 10:46AM
Yes but it is not the only rally car I have owned. My hate of gadges comes from my 323GTX with turbo boost, EGT, Mixture, Water Temp, Oil Pressure, Voltage, Oil Temp and likely some more.

So I go into the last stage of a rally in I think 2nd place in some novice class a few seconds down on 1st. About half way though I see the boost and oil temp looking odd, I spend some time looking at them to see if there is a problem since I had lost a few turbos on this car. Rather then driving the car I start to diagnose it. The results are inconclusive, with the demands of the stage I can not tell if the readings are a problem or not. Finally I decide to not worry and get back on the pace.

Finish the stage and find I droped 30 seconds and down to 4th in class, I ran the stage slower than I had the time before - that never happens I always impove my times. Once back on the transit, everything reads right... there was never a problem.

Two years later I finally understood, there is no point in gadges cause I am never going to stop or Trouble-shoot ever again on stage unless the car stops going.



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Scott Manley
Scott Manley
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Re: Fuel pressure sender
February 24, 2006 01:22AM
I'm wondering why the switch for the pumps? Other than that's how Ford did it. Pressure is regulated, so why not run both all the time?





Scott Manley
Spokane, WA
86' XR4Ti
37
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Morten
Morten
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Re: Fuel pressure sender
February 24, 2006 02:18AM
If I had to take a shot at this, it's because one's a spare in case the primary one is clogged with crap or breaks down. That's the conclusion I guessed, since mine are labeled "Fuel pump" and "Aux. Fuel Pump" under the respective toggle switches on my dash/console.

Proper guess ?



Edited 1 time(s). Last edit at 02/24/2006 02:20AM by Morten.
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sagsert
Mustafa Samli
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Re: Fuel pressure sender
February 24, 2006 09:03AM
Ramada 05, after a crappy day 1 Cem and I decide to let it lose. Diamond Creek Out, 3 miles to end of stage, oil pressure starts dropping, even though the engine is running normal, 200 yards from the tree/water spot, oil pressure is down to 15, panic in the car, I have the video. We pull over. I am trying to diagnose wtf from the cabin, oooooops, Coralba flickering, none of the OEM gauges are working, map light kaput aswell. You can hear me yell in Klingon (I think that was it) " Electrical, Keep Going ". We continue but now we are both spooked, I'm reading with one eye on gauges he's driving with one eye on gauges. We lose a little over 45 seconds but still make decent time.

Vermont installed the Oil Pressure Gauge on the same circuit as the OEM one, duuuuh, something tripped the dash fuse and we lost all gauges. We replace it in service, second to last stage, it blows again, now the fuse I put blows immediately, 10 miles from the finish of last stage we DNF due to an alternator problem, or so we thought.

Moral of the story, too many gauges are like too mant mirrors around a woman, they will either cost you $$$ or make you time.

And now the rest of the story;

A month after Ramada, the dash is out the wiring harness is being inspected wire by wire, there is nothing wrong, but the car is still not charging, knee deep in frustration. A visiting Turk chimes in, 15 minutes later we have the culprit, a fried DCCD harness that looks fine from the outside but the wires shorted from the center of the bundle when they got heated by the catatonic complexer.Once it was fixed everything was bach to normal. Subarus need the dash-DCCD Computer-DCCD trio to work at all times, if not, well the DCCD is out and God knows what kind of torque split you have and more importantly the car does not charge. Stupid eh ?





Cheers
M.Samli
Phoenix AZ
Gaylant VR4
EVO III GSR (Stolen)


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Scott Manley
Scott Manley
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Re: Fuel pressure sender
February 24, 2006 09:30AM
I understand that Morton, but if both pumps feed the same line and regulator, why the switch? Look at it this way, if one pump is running you get say 40 psi fuel pressure, if both pumps are running you still get 40 psi fuel pressure. If one pump dies you still have 40 psi fuel pressure.



Scott Manley
Spokane, WA
86' XR4Ti
37
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PAddy
Patrick McVeigh
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Re: Fuel pressure sender
February 24, 2006 11:11AM
Scott Manley Wrote:
-------------------------------------------------------
> I understand that Morton, but if both pumps feed
> the same line and regulator, why the switch? Look
> at it this way, if one pump is running you get say
> 40 psi fuel pressure, if both pumps are running
> you still get 40 psi fuel pressure. If one pump
> dies you still have 40 psi fuel pressure.

But then you're running one pump unnecessarily. If a pump has a finite working life before failure, no sense leaving them both up to chance.


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Skye
Skye Nott
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Re: Fuel pressure sender
February 24, 2006 04:06PM
OK all you guys hate gauges....

The boobies told me to do it!!!! ARgh






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john vanlandingham
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Re: Fuel pressure sender
February 28, 2006 05:14PM
Damn Skye she has a top on!!! What the fuck???

PS where the hell have you been??



John Vanlandingham
Sleezattle, WA, USA

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Lurch
Eric Burmeister
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Re: Fuel pressure sender
March 08, 2006 02:59PM
I have done this Skye. I actually pulled my oil pressure sensor out, put in a pipe plug and got a -6 to npt adapter and mounted the actual OP sender onto a free-but-previously-capped -6 fitting on my FPR.

This is when I was having a lot of trouble with my new turbo engine installation and wanted to check fuel delivery. Ran it. Logged it with a note that OP actually = FP on that run.

Motec engineer suggested it. I'd say its fair game.

For good sensors, go to the Motec website, download the catalog, see what they use (usually a Delco or Bosch unit) get the part number and order it from your auto parts store.

Party on.



Lurch
Eric Burmeister
The west coast...of Michigan
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john vanlandingham
John Vanlandingham
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Re: Fuel pressure sender
March 08, 2006 04:12PM
Hey Lurchie, you seem to get the drift with what we're up to.
As all these boys are rank (phew) beginners, none are supposed to be having any evil thoiughts of more power so all we've done on the motor side is use the Garrett T3 of Ford Cossies, added a 2wd Cossie intercooler and that's that.
Now IF we check and see AFR being somewhat wacky cause of how the turbo and intercooler work and we have the standard EEEEK! IV management then the only thing we have to putz with is the COSSIE ADJUSTABLE FUEL PRESSURE REGULATOR, so we sorta want to be able to see where we are.

Yeah getting Bosh senders is nice or all Krautski stuff as they invariably have their range stamped on the hex.



John Vanlandingham
Sleezattle, WA, USA

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CALL +1 206 431-9696
Remember! Pacific Standard Time
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Lurch
Eric Burmeister
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Re: Fuel pressure sender
March 08, 2006 04:54PM
Right on, John. Another trick I did on the VW for wacky enrichment was to put a potentiometer on the dash wired to the coolant temp sensor. Don't know if the Ford EEC adds fuel for warm up, but if they do, you could do that too for a bit more fuel.

The Protege originally used an EEC V and I had to add an adjus. fpr on that, too.



Lurch
Eric Burmeister
The west coast...of Michigan
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Skye
Skye Nott
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Re: Fuel pressure sender
March 08, 2006 04:58PM
You know guys on eBay sell coolant temp sensor resistors for a million dollars on eBay for "big HP gains" hahahah




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Lurch
Eric Burmeister
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Re: Fuel pressure sender
March 08, 2006 05:04PM
Radio shack. 5 bux. Potentiometer so its tuneable.

ebay sucks.



Lurch
Eric Burmeister
The west coast...of Michigan
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