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Re: Stupid(?) Questions, 1990 CQ
Jim Fraser wrote:
> Good day-
> A few questions from a newcomer about 1990 CQ. Please excuse if
> covered in the archives -- I haven't had luck accessing :-(
> *Question 1: Brake pedal and steering wheel were flaky, with *brake*
> whenever I jammed the pedal quickly. I installed a used *bomb* from a
> 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
> 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
> 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
> 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
> 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
> body--seems functional w/ohmmeter test), and although I need to use
> accelerator to start the car, I couldn't get it to stall from high-rev
> 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
> 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
> (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!
> 1990 CQ 120K
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