Jeff Nathanson wrote:
>
> (Sorry if this is a double-post, but I don't think it got out the
> first time)
>
>
> Well, about 6 months ago, I purchased the Colortune thinking
> that I would realy go first class in tuning the carbs in my '71 TR6. Last
> weekend
> I finally got around to using it and I got conflicting results. At idle, the
> RPM's decrease when I lift the air valve. According to Bentley, page 221,
> this indicates that the air/fuel mixture is weak. However, when I look at
> the Colortune, inserted in the appropriate cylinder, it fires yellow
>indicating
> a rich mixture. The car runs OK, but there's a definite "putt-putt" sound at
> a frequency of about once per 5 seconds.
Kelley's car does the EXACT same thing....I've got the needles at
full rich, but it exhibits lean misfire characteristics.
I've searched and searched for vacuum leaks and thought I had em
all taken care of.
Sorry I can't offer any real advice.
Regards,
TJ
|