Question about 1990 Mitsubishi Eclipse
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Posted on Jan 02, 2017
I had the same problem when I did battery maintenance on my 1988 Montero Sport. The problem was explained to me, that the car's electronic pollution control computer data was erased when the battery is disconnected or the battery totally discharges. The car's computer uses this data to regulate idle speed and other engine factors. The solution given to me was to recheck the battery connections (make sure they are clean, and tighten down), start the vehicle, and just let it sit and idle for about 15 - 20 minutes (without racing the engine or driving the vehicle). This will rebuild and repopulate the car's computer engine data it needs to make adjustments. Hope this helps.
Posted on Dec 17, 2008
with the battery fully charged try scraping the positive over the terminal on the battery and see if it sparks like a draw is sucking out amps if theres no draw on the battery it wont spark at all (good) if it sparks (bad) you have something grounded and killing your battery.. gl
Posted on Jan 06, 2009
it could be that your air mass meter is going bad, or that you have a vacuum leak. check your air filter how dirty it is.
if it's too old or dirty replace it because it will kill your air mass meter and will cost you 10 + times more.
Posted on Jan 08, 2009
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Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
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