Question about 2004 Isuzu Rodeo

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Car petrol engine revolution surges.

On my 2004 Vauxhall Frontera 3.2 V6 manual petrol( only 17K miles)-- engine revs surge up to approx 2750 revs and down again until engine warm and then only settles to normal after attempting to stall vehicle in gear.

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Here is the most common cause of surges and stalls, 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 12, 2008

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