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- 1984 cadillac cimarron...help!
September 1, 2004, 10:53 am
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Re: 1984 cadillac cimarron...help!
Hit a parts store like NAPA or Shucks and get three bottles of
injector cleaner to put in the gas tank. That might clean things
up. If not, it's quite likely there's a piece of crud jamming the
injector open. Some injectors in throttle body systems can be
carefully taken apart enough to clean/replace the inlet screen
and get junk out of the needle and orifice.
Rebuilt injectors are $$$. It's still possible to find Cimarron
parts used, I had to replace the digital instrument panel in
my 1986 V6 and find an engine computer. The car sat in a
junkyard for two years and all they ever sold off it was the
computer and left rear window motor. :) It had been clipped lightly
across the nose so I had to replace the front bumper, fenders,
hood, fiberglass nosepiece, etc. No structural damage. Sure has
made for a nice driving little car. :)
FYI: up through 1986, the GM engine computers are all identical.
The difference is in the two plugin chips under the cover.
As long as those chips are good, you can swap them into any
GM computer from the same era, 4, 6 or 8 cylinder. Just don't
insert them backwards! GM changed the computer design in 1987
but it's the same deal, just the two chips, except they're on
a common carrier that's keyed to make it impossible to install
The small chip is called the "calpack". It contains the basic
program to make the engine run. The other chip contains engine
specific data plus a RAM area that stores self-programmed
calibration data. This RAM gets erased when you disconnect the
battery, which is why the car will run rough for a bit when
first started after reconnecting the battery. If the car runs
like crap ALL the time, this chip may be fried.
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