Question about 1999 Volkswagen Beetle
Start with first code fix that, clear codes and test drive if possiblethrough drive cycle.repeat with next code in line if problem persist
Posted on Feb 05, 2015
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Posted on Jan 02, 2017
Check for vacuum leaks. Also try cleaning the ISV.
If that doesnt work go to vwvortex.com and post your issue there
Posted on Jul 08, 2009
Check condition of spark plugs, fuel filter and air filter.
Check condition and/or replace plug leads.
Strip clean and inspect idle control valve.
Report if no fault found.
Posted on Nov 07, 2012
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Feb 06, 2015 | 2009 Ford Focus 1.8
Here are the most common causes of idle surge, rough idle esp when cold and 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.
Jul 09, 2017 | Cars & Trucks
Jul 14, 2017 | 1995 Buick Century
Feb 10, 2013 | Chevrolet Camaro Cars & Trucks
Throttle Body Cleaning
You can in most cases repair this slow speed stall or unstable idle by cleaning the engine throttle valve and the idle speed control valve using a product called CRC Spray Throttle valve cleaner. Spray the cleaner into the air intake of the engine with the hose removed from the throttle body, the engine will try to stall so hold up the idle speed manually. Once you have used up about 1/2 can of the cleaner stall the engine out while spraying and turn the key off, disconnect the negative battery cable for 5 minutes and then reconnect and drive the car for a about 25 miles of varied driving modes. If this doesn't cure the problem you may need the fuel injectors professionally cleaned by the dealer service dept.
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