Question about 2000 Volvo S40
Hi i have a volvo s40 se GDI with Mistubishi engine when i start the rpm is very high at 3 and it donot come down to 1 rpm even the engine is warm.
my grage said i may hvae to change the thorottle housing unit. sone times when i am doing 20 -30 mph the rpm come down to normal, also some time when i change gears its missing can you advice me...
YOU MAY HAVE A IDLE SPEED CONTROL VALVE PROBLEM, CLEAN IT FIRST, THEN DISCONNECT THE BATTERY, FOLLOW THE PROCEDURE I HAVE ATTACHED.
Here is the most common cause of this stall and idle speed issues, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) 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.
Posted on Nov 07, 2008
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Posted on Jan 02, 2017
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