Re: Surging at 11psi

[audistuff@juno.com (Paul R Anderson)]

Please let me know what you find out.
This sounds like my 87 Merkur XR4Ti symptoms.
I'd love to figure out what it is.


Paul Anderson:
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Please send any direct mail to my private address as I don't keep up with
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On Mon, 30 Nov 1998 23:23:20 -0500 Bill Elliott <wcelliot@concentric.net>
writes:
>Life's never simple with a UrQ!
>
>The problem of the day:  Surging/cutout at 11 psi.
>
>On my 85 UrQ I have the IA Stage 1 kit and a K24.  For the past 25k,
>I've been running at 2.0 bar and enjoying every single minute if it.
>
>I have about 10k on the plugs (Bosch tri-electrodes).  Three months 
>ago,
>I replaced the IC/IM hose (blew the factory hose).  A few days ago, I
>started getting some surging (almost a cut-out) at 11 psi in 2nd gear
>when the car was just warmed up (7-10 minutes of driving).  The 
>problem
>was not apparent (or very minimal) in 3rd or above or at all after 
>about
>15 minutes.
>
>Now it happens constantly.  I have a strong pull to 11psi and then it
>flattens out significantly along with some surging/kickback.  Very
>occasionally (and always in 3rd or 4th), I get a strong pull to 14psi
>and then get the surging.
>
>I checked the WOT switch and found an intermittent short.  I fixed 
>this,
>but it made no difference. Tweaking the wastegate allowed more boost,
>but the same 11 psi cutout.
>
>This is not rpm-related... strictly boost-related.   It does not feel
>like an overboost cutout (but then I've never really experienced 
>one).
>Mileage and drivability are otherwise unaffected.
>
>I'm open to suggestions. (No, I'm not selling it!) ;-)
>
>Bill Elliott
>Lake Mills, WI
>(ps... I finally found a copy of Bill Cosby's "200mph"... the bit 
>based
>in fact when Carroll Shelby convinced Bill to trade his Ferrari for a
>twin-turbo 427 Cobra.  " I _need_ a car that will do 200mph to the
>grocery store"  I had heard it years ago, but had never been able to
>find a copy. One of the funniest album sides I've ever heard! "Really
>Officer, I was just blowing out the gunk!")
>
>
>
>

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