Fuel Accumulator--Need help

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07-11-2018, 01:50 PM
bluespecial

Fuel Accumulator--Need help

Been having hard start issues with my delorean for awhile so I decided to replace the accumulator. I read and watched videos on youtube for instructions. These instructions state only a little fuel will drain out of the accumulator when removing it. But I cannot stop the fuel from coming out of the hose that connects to the bottom of the fuel accumulator. It's not a leak, the gas keeps flowing. I have it clamped for now but its still trickling out. Did I miss a step or what could be going on here? Don't really want 13 gallons of fuel in buckets. Is there a manual fuel shut off valve? Any help would be appreciated.
07-11-2018, 01:58 PM
kings1527

Quote:

Originally Posted by bluespecial

Been having hard start issues with my delorean for awhile so I decided to replace the accumulator. I read and watched videos on youtube for instructions. These instructions state only a little fuel will drain out of the accumulator when removing it. But I cannot stop the fuel from coming out of the hose that connects to the bottom of the fuel accumulator. It's not a leak, the gas keeps flowing. I have it clamped for now but its still trickling out. Did I miss a step or what could be going on here? Don't really want 13 gallons of fuel in buckets. Is there a manual fuel shut off valve? Any help would be appreciated.

I'm assuming you mean "hot" start issues? If that's the case, then yes, the accumulator could be the issue. Could also be the PPR O-rings or a couple other things.

If everything else is sealed up, such as the boot at the fuel pump, gas cap on correctly, all fuel lines attached, etc, then there shouldn't be much fuel leaking out. I can't remember exactly how much came out when I did mine but it wasn't a few drips nor was it a few gallons. I'm guessing the flow will stop if everything else on the car is buttoned up. Kind of like having your finger on a straw: the second you take your finger off the top, water flows out of it.
07-11-2018, 02:01 PM
bluespecial

Yes "hot start" issues
07-11-2018, 02:13 PM
FABombjoy

If the internal diaphragm has failed (causing the hot restart issue too), perhaps you are siphoning fuel from the tank via the accumulator?

If so, you may need to keep the accumulator high and disconnect the feed hose from the accumulator, letting the feed line drain until air enters and breaks the siphon.
07-11-2018, 02:23 PM
bluespecial

I have the old accumulator removed now, the flow of gas continues. Is the internal diaphragm inside the accumulator or some other part?

Quote:

Originally Posted by FABombjoy

If the internal diaphragm has failed (causing the hot restart issue too), perhaps you are siphoning fuel from the tank via the accumulator?

If so, you may need to keep the accumulator high and disconnect the feed hose from the accumulator, letting the feed line drain until air enters and breaks the siphon.
07-11-2018, 02:43 PM
Bitsyncmaster

Take the fuel take cap off. You may have pressure in the tank.
07-11-2018, 02:54 PM
FABombjoy

Quote:

Originally Posted by Bitsyncmaster

Take the fuel take cap off. You may have pressure in the tank.

Yes! Good thought!

To quote an old post:

Quote:

Originally Posted by DMCMW Dave

Attachment 45534

PS the short ones have been known to crack and leak fumes. That's really all there is to look for.

PPS The rollover valve (Hi Matt) has been known to get stuck and cause the tank to pressurize as well.
07-11-2018, 03:09 PM
DMC-81

Yes, the fuel is siphoning out of the tank. This happened to me as well. I blew compressed air in the line to break the prime and that stopped the flow.