spridgets
[Top] [All Lists]

Re: MG running rough

To: Bill Gilroy <w.gilroy@verizon.net>, spridgets@autox.team.net
Subject: Re: MG running rough
Date: Wed, 25 Jul 2001 22:43:38 -0700
Bill,

Do you have a fuel pressure regulator? 4-5 PSI is kind of high. Stock SU
fuel pump is 2.5 to 3 PSI. This could cuase your floats to overfill,
raising the fuel level to high in the jets. causing spillage into the
throats. Also check that your float needle close and seat properly. Lack of
a heat shield could be a problem, but not when the engine is cold obviously.

Gerard

At 12:32 AM -0400 7/26/01, Bill Gilroy wrote:
>My car performed well at the PA rally.  The only real problem I
>noticed was that if I let the car idle for several minutes I would
>start to smell gas and the car would run rough and stumble on
>acceleration.  After I revved the engine and ran through the gears it
>would go back to normal.  It also sometimes has a slight miss at speed.
>I figure I have several problems not just one, and as one lister put
>it, "70 percent of all carburetor problems are electrical," I have to wonder
>where to start.  This is what I have done to the car and what I think:
>
>The car has dual SU with no heat shield.  The plug, points, dizzy cap,
>rotor, wire, and condenser was changed less than 500 miles ago.  The fuel
>filter was changed within 200 miles.  The car has a NAPA electric fuel
>pump that puts out about 4-5 PSI.  On Tuesday morning the car was hard
>to start, backfired and missed till it warmed up.  Today it was fine.
>
>I was thinking that without a heat shield I might be boiling the fuel
>in the carburetor and winding up with extra gas in the carburetor throat.
>
>Anybody have any other ideas of what to try or where to look?  I
>realize this is a very fuzzy description and really hard to get an
>handle on via e-mail, but thanks for listening.
>
>--
>Later,
> Bill                          mailto:w.gilroy@verizon.net
>
>"Facts are the enemy of truth"
>77 Midget
>90 Shar-Pei


--
Please visit Four Points Travel -
Discount Online International Travel Reservations
http://www.gerardsgarage.com/fourpoints
To make a reservation please call Toll Free 1-800-272-3253


G G              Gerard Chateauvieux
 E A
  R R        pixelsmith@gerardsgarage.com
   A A
    R G          Pixelsmith  on  Duty
     D E
      S      http://www.gerardsgarage.com



<Prev in Thread] Current Thread [Next in Thread>