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Stupid(?) Questions, 1990 CQ
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?
*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?
*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?
*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 (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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