Re: Stupid(?) Questions, 1990 CQ

[jgraham1@erols.com]

Jim Fraser wrote:

> Good day-
>
> A few questions from a newcomer about 1990 CQ.  Please excuse if
> they're
> covered in the archives -- I haven't had luck accessing :-(
>
> *Question 1:  Brake pedal and steering wheel were flaky, with *brake*
> light
> whenever I jammed the pedal quickly.  I installed a used *bomb* from a
> 60K
> CQ wreck.  The pedal & wheel feel improved some, but now I get the
> light for
> 20 seconds or so at cold start or when I pump the brake 3 or 4 times.
>  Hydraulic fluid stays up, and I can't see any drips.  Seems to me the
>
> replaced *bomb* was better, but not perfect.  Any opinions?
>
My bomb went bad at 45K. So it looks like you need a new one.

> *Question 2:  Voltage gauge in center console:  95% of time it's
> pinned at
> top (16V+).  I checked voltage at the plug:  12 to 14V (normal w/14V
> regulator).  My question:  can I fix this somehow, or just replace?

Take it out. There maybe a zero set on it. If not it's bad for good.

> *Question 3:  Temp gauge:  I replaced the 4-pin 'multifuntion switch'
> from a
> wreck w/good luck.  However, now I can look away for a second, then
> return
> to see it dead.  Then, I can often watch it rise again, only to fall a
>
> little later.  Does this sound like ground to anyone, or just need to
> cough
> up the $$ for a NEW sender?
>
That maybe why only 3-pin ones are a replacement for the 4-pin.

> *Question 4:  Car stalls when I start it;  worse when hot, but
> sometimes
> when cold.  If I catch it with the accelerator it stays running. 
> Stalls (or
> NEARLY stalls, now that I increased the idle speed) when at high rpm
> then
> throw in clutch.
>
> When hot, I disconnected the ISV (which seems to hum sometimes, but
> not all
> time BTW) and can't start the engine.  Re-connect the ISV and
> disconnect the
> Throttle-Closed Limit Switch ([?] green 2-terminal plug above the
> throttle
> body--seems functional w/ohmmeter test), and although I need to use
> the
> accelerator to start the car, I couldn't get it to stall from high-rev
> to
> low.  However, the engine speed then seems to drop very slowly when I
> let of
> on the gas.
>
> The real question here (while I haven't yet checked the limit switch's
>
> resistance) is:  should I try to clean the Idle Speed Stabilizer Valve
> or
> Mass Flow Sensor

NO NO! It cleans it self after 3,000 rpm. It looks like the wrong spark
plugs or the O2 sensor.You need a Bently manual and make a fualt code
reader.

> (and what's the best method), or does anybody have (or HAD)
> this problem w/A80 or A90 type vehicles, and what did you try?
>
> Welcoming all comments!
>
> Jim
> 1990 CQ 120K
> ***** Message Was Scanned For Viruses *****
> 

 
John.
1990  CQ