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Location:
Sydney NSW
Registered:
July 2004
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AE86 Fuel System Upgrade
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Wed, 03 August 2005 04:15
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Hi people
Car is ADM 86 with 96KW 4AGE
I have noticed this morning that my external VL (i think) pump is drawing a fair bit of current, suggesting it is having "issues", so i am reserching the available options.
The current setup appears to have no surge tank, its just a VL pump mounted under the car in front of the diff.
First question,
Is it possible to tell the difference between a carby 86 tank and an EFI 86 tank from the underside without pulling it off the car? (just in the off chance it has already been swapped).
I dont like the idea of running without a surge, so if i need to replace the pump, i am thinking of a new system altogether.
A lot of people talk about AE82 EFI pumps, is this for the Carby tank or the EFI tank?
I think my easiest solution is to install another low pressure pump then a surge before the VL pump, but after serching the forums there is a fair bit of ambiguous information out there, leaving me more confused than ever.
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Location:
Rosanna, Melb
Registered:
June 2002
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Re: AE86 Fuel System Upgrade
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Wed, 03 August 2005 04:34
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Firstly are you sure something is wrong with your pump? If it aint broke dont fix it. My lift pump pulls about 10amps (it is a Holley Blue after all)
An EFI pump will work in a non-EFI tank, but you will just get fuell surge when you get low on juice.
Options:
- Continue running as is and just don't run your petrol low
- Drop an intank EFI pump into the tank. Assuming your tank is NOT baffled then again don't run your petrol low.
- Use another pump to lift into a surge tank and then use your current pump to draw from this and pump to the fuel rail
- Pull out your tank and add some baffles so you can run an in tank pump and not worry about surge.
All of this info and more should be available plenty of places around the net so keep reading.
Hen
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Location:
Sydney NSW
Registered:
July 2004
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Re: AE86 Fuel System Upgrade
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Wed, 03 August 2005 05:08
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Yeah, im not sure as yet, but when i went to hit the kill switch on the pump this morning when i parked it, it was quite hot compared to normal. Now it could be the switch, but the pump was labouring quite a bit more than usual (its normally fairly audible, and "pulses" at idle, but it was at full cycle while which was not its usual thing)in a nice long traffic jam on the way to work and i have been toying with the idea of adding a pump and surge setup anyway, so its been running around in my head for a while.
Thanks anyway Henn
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: AE86 Fuel System Upgrade
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Wed, 03 August 2005 05:41
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FFFAAAAAAAAAAAAAAAARRRRRRRRRKKKKKK!!!!!
Your fuel pump is run through a KILL SWITCH!?!?!?!?!!!!!!one
This, and your fuel pump wiring, are solely the cause of your issues. Those camira/VL pumps work fine when mounted next to the tank in an AE86, so i have serious doubts your pump is toast.
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Location:
Sydney NSW
Registered:
July 2004
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Re: AE86 Fuel System Upgrade
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Wed, 03 August 2005 05:53
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 yeah, its a bit dodge, My car has been a bit of a "magical mystery tour" since i bought it, i got a few inherited issues to sort out
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Location:
Rosanna, Melb
Registered:
June 2002
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Re: AE86 Fuel System Upgrade
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Wed, 03 August 2005 06:26
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Run the kill switch on your fuel pump RELAY, not the high current wires to the pump itself.
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Location:
Sydney NSW
Registered:
July 2004
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Re: AE86 Fuel System Upgrade
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Wed, 03 August 2005 06:43
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I shouldnt really post technical questions on here when im busy at work,   Its painfully obvious to me now what is going on. The pump already runs through a relay, controlled by the kill switch, which makes this whole thread pretty useless. I think the warm kill switch is more an indication of the kill switches condition 
Feel free to ignore this thread
But, one question still stands. I know EFI 86 fuel tanks are hard to come by, but does anyone know if you can tell the difference just by looking at the underside of one?
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Location:
Melbourne
Registered:
January 2005
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Re: AE86 Fuel System Upgrade
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Wed, 03 August 2005 10:25
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You should try mounting your fuel pump a little closer to the tank, i run a bigport 4age with some dodgy efi pump out of god knows what and have not had a problem.
I also ran an 8mm line to the fuel rail for better flow and future mods, i would also reccomend this. A mate of mine with a gze used is original (6mm) lines and it ran like shit until he replaced them and it was sweet.
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Location:
cambo
Registered:
May 2002
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Re: AE86 Fuel System Upgrade
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Thu, 04 August 2005 09:20
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dood it wasnt the original lines it must have been something else. i ran my gze on 15psi for ages with no troubles, and now im running a fairly large turbo and the standard lines are holding up fine. its not ideal, but for a 4age its deinfately ok.
cannonball, if i were in your situation and i was parranoid about it id just run a surge tank. you can fit one under the car, would cost you no more than $200 to get the whole setup running.
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