spitfires
[Top] [All Lists]

Re: Phantom Miss

To: spitfires@autox.team.net
Subject: Re: Phantom Miss
From: Growe58@aol.com
Date: Wed, 16 Jun 1999 10:18:14 EDT
Really obvious things to double check that caused similiar symptoms for me in 
the past

Valve lash? - very sensitive to misadjusted valve clearance
Plug gaps all the same? - I DID say obvious :)   
Damping oil in the carb topped off?

Good luck!

-Greg

In a message dated 6/15/99 11:01:14 PM EST, papirtis@erols.com writes:

> Fellow listers,
>  
>  Any suggestions welcome!
>  
>  Have been having a bit of a time trying to find the cause of a miss (or
>  pulsing) experienced when backing off the throttle, or holding a steady
>  speed.  There is also a slight popping from the exhaust as the throttle
>  is let off during shifting.  
>  
>  Accelerating has no miss and higher speed cruise has a less noticable
>  miss or pulse.
>  
>  1980 Spit.
>  -Lumenition System and Distributor checked out
>  -Fuel pump tests fine
>  -Fuel filter has been replaced
>  -Coil has been changed out with test coil from other smoothly
>  operating,spit.
>  -No fouled plugs
>  -Plug wires have 1 K on them
>  -Timing set to factory specs.
>  -Engine, carb, emissions, and exhaust are all at original factory stock
>  -Emissions setup includes pump, check-valve, gulp valve, and air rail to
>  cylinders
>  -No apparent vacum leaks
>  
>  
>  Any thoughts welcomed!
>  
>  
>  Thanks!

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