Coolant Leakage Solved- BUT . . .

Bernie Benz b.benz at
Tue Aug 2 10:03:59 EDT 2005

ECU codes?

> From: Kerry Griffith <i2k at>
> Date: Tue, 2 Aug 2005 07:12:51 -0600
> To: 200q20v at
> Subject: Coolant Leakage Solved- BUT . . .
> I believe I reported that the second new coolant reservoir cap solved
> the first leak. When we last left our hero, the second lead appeared to
> be from the radiator or hose. According to my mechanic, the reservoir
> tank had a leak that sprayed coolant onto the radiator area. New tank
> resulted in no more coolant leaks.
> BUT . . .
> Still no explanation for the following: After the car idled in 101F
> with A/C on for 10 minutes, it ran very poorly- the instant the turbo
> began to  make boost it would hesitate briefly until there was no
> positive manifold pressure, then run normally until the next
> application of anything but the most delicate throttle. After 10-15
> nervous minutes on the highway at warmer than usual but not overheated
> temps (no extreme gauge readings nor warning lights) the coolant and
> oil temps dropped a bit and the car ran fine for the remaining 20
> minutes home. After letting it cool for several hours it ran fine.
> My mechanic has no clue- says he's never encountered this before. This
> happened when my coolant leak was operational, but since the car cooled
> sufficiently so as to be within normal temps after 10-15 minutes on the
> highway, I assume it is a different and as yet undiagnosed problem.
> Since my mechanic is as clueless as I on this one, I once again seek
> group wisdom.
> BTW, I've driven the car about 100 miles in 80-90F and behavior is
> normal but for the need to apply throttle at start up (20% of the time
> only) and never more than 1.6-1.7 bar indicated for the last 6-12
> months instead of the 1.8 we enjoyed for years.
> Another (yet another!?) tiny vacuum leak?
> Help! I don't want to be Turning Japanese!
> Kerry
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