apparent lean running issue?

Dave Yentema yentemad at
Tue Nov 11 08:35:08 PST 2008

Wow, you read my mind.... I do notice the smell of gas every now and then and i'll be dammed if i've been able to trace it....
  ----- Original Message ----- 
  From: LL - NY 
  To: Al Streicher 
  Cc: Dave Yentema ;  
  Sent: Tuesday, November 11, 2008 8:40 AM
  Subject: Re: apparent lean running issue?

  If your injector seals are going bad, and you park in a garage, you will notice the smell of gasoline when you approach the car. BTDT, went away when I replaced the seals (actually, with the milage on the injectors at the time, I just replaced the injectors). Just a bit of diagnosis help. 

  LL - NY

  On 11/11/08, Al Streicher <streichea001 at> wrote:
    It could be the injector seals and insert. I replaced the inserts and seals
    not long ago and it really improved my mileage and idle. The job was pretty
    easy. I had to cut(Dremel)the plastic inserts lengthwise to get them away
    from the injector. Other than that, it went well.

    '90 80

    -----Original Message-----
    From: quattro-bounces at
    [mailto:quattro-bounces at]On Behalf Of Dave Yentema
    Sent: Monday, November 10, 2008 2:33 PM
    To: quattro at
    Subject: apparent lean running issue?

    OK well, I've got every vacuum leak that I know of taken care of, just put a
    new VC gasket on, replaced 90% of my vac lines (the rest I know are fine),
    put a new o-ring on my oil dipstick, new oil filler cap, silicone breather
    hoses from 034, etc. I wish I had a WB 02, but my narrowband shows a
    definate trend of running lean. At idle sometimes it'l wobble back and forth
    around stoich, going slightly(like one "bar") rich which is the way I had
    originally set it. But most of the time it bounces slightly lean to high
    stoich, sometimes rich, and the idle surges as it changed. When I first hit
    the gas to accelarate, it'll snap down so lean its not on the gauge and then
    come back up, bouncing from like 3 bars of lean to 1 bar of rich, while
    spending more time in lean. Under full throttle it'll go rich like it
    should, but the second I let off the slightest bit it'll start bouncing lean
    again even under boost!!!. on decel(letting my foot off completely from
    doing like 50) the exhaust pops irradically, and the gauge is all over the
    place but likes to hang out in the rich area( my car's an autobox, so no
    decel valve) I felt it miss twice the other day under mild accelaration. I
    was thinking perhaps it was my injectors/seals because for a while I had a
    leaky VC gasket, so maybe the seals got soaked with oil and got destroyed.
    Any suggestions are awesome

    Oh yea, its a 87 5ktcs


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