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Mail From: Larry (Larry Alster)

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RE: Strong smell of gas at WOTThis was posted by Jeremy
----- Original Message -----
From: Schuster, Jeremy
To: Larry Alster ; Burgess, Michael L. ; (email redacted)
Sent: Thursday, April 29, 2004 5:34 PM
Subject: RE: Strong smell of gas at WOT


I've fixed the 'gas smell under WOT' problem on a few boosted cars by adding a second, larger o-ring at the top shoulder of the injector. This is not to seal the injector to the rail, but to put additional pressure on the injector at the head/injector interface. The problem was that the injectors were being pushed off their seats in the head under boost, spraying a very fine mist of fuel outward from the base of the injector. I happened upon this by chance while checking the operation of my BOV on a dynojet a couple of years ago. If you can easily spin the injector when it's installed, then you're at risk for this problem too, IMO.



This assumes that you already have the one-way valve to the charcoal cannister installed, which is the #1 cause of gasoline smells in my experience.



Feel free to post this to the list. I can't reply to it from this address.



Jeremy



-----Original Message-----
From: Larry Alster [mailto:(email redacted)]
Sent: Thursday, April 29, 2004 4:10 PM
To: Burgess, Michael L.; (email redacted); (email redacted)
Subject: Re: Strong smell of gas at WOT



He said he sees gas around the injectors. If I see gas at the injectors I'm replacing the orings and fixing the problem. Why do I need to investigate further?? Fix what you see and then if there is still a problem deal with that but start with the obvious and dangerous. :)



Larry



White Knight 1991 Crystal White #99 CSP
Silver Bullet 1992 Silverstone #17 EM BEGI System IV Turbo +
Honey B 1992 Sunburst Yellow
Whoosh 2004 Titanium MazdaSpeed MX5



LowCountry Miata lowcountrymiataclub.net
Masters Miata
RAGS 074

----- Original Message -----

From: Burgess, Michael L.

To: 'Larry Alster' ; (email redacted) ; (email redacted)

Sent: Thursday, April 29, 2004 3:47 PM

Subject: RE: Strong smell of gas at WOT



Isn't there a way to simulate WOT while not moving and not opening the throttle by hand? What I mean is--can't you squeeze one of the fuel regulator's hoses to raise the pressure to a full 60 or such psi....and then you can see if you have a leak first hand..wear glasses btw.

Can someone help fill the holes in my story...which hose etc.

-Mike

-----Original Message-----
From: Larry Alster [mailto:(email redacted)]
Sent: Thursday, April 29, 2004 2:30 PM
To: (email redacted); (email redacted)
Subject: Re: Strong smell of gas at WOT



If you see fuel you have a leak, you need to fix it so you don't have a
fire.

O rings come from the dealer or a parts house.

As for the boost gauge, why replace something that is a mechanical system,
boost, with an electric gauge. Make sure the noise is the gauge and not a
leak in the line and then just get another gauge of a different brand. My
Autometers have always worked fine.

Larry Alster

1991 "White Knight" CSP #99
1992 "Silver Bullet" EM #17 BEGI System 4.2+
1992 "Honey Bee"
2004 "Whoosh" MazdaSpeed MX-5
----- Original Message -----
From: "Matt Bennett" <(email redacted)>
To: <(email redacted)>
Sent: Thursday, April 29, 2004 10:15 AM
Subject: Strong smell of gas at WOT



> I've got a strong smell of gasoline at WOT, and some evidence of a bit of
> gasoline leakage around the injectors (550cc).
>
> I've heard talk of injector o-rings- could this be the culprit?
>
> Anything else to investigate?
>
> If it is o-rings- where/how do I get new ones?
>
> Is there anything I should be careful of when replacing them?
>
> also:
>
> I've got a mechanical boost gauge- which I think is "whistling" under
> boost (but reads accurately AFAIK) I've been considering replacing it
> with an electrical gauge- any suggestions for a gauge/sensor combo?
>
> Thanks,
>
> Matt
> '96 w/ proto Ubercharger
> Austin, TX



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