Question about Hyundai Cars & Trucks
I think you will need to be a bit clearer with your description of the problem. Are you saying ... It runs bad until you hear this thud then it runs good. But it is still slow taking off from a stop? Or ... when you take off from a stop it is very slow until you hear this thud then it takes off as normal. Are you certain this thud is coming from the engine. Does it sound like it is coming from any particular location under the hood? For someone to be able to help you on an online site like this you need to be very detailed in explaining the problem.
Posted on Nov 28, 2013
Testimonial: "Hi Damon sorry not a car buff! car starts and drives fine no noises etc. then with no warning I get the Thud, it is comming from under the bonnet I belive on the drivers right hand side. It doesn't lose power prior and there is no other noise associated with it. it is now making intermitant clanking sounds from the same area"
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Posted on Jan 02, 2017
SOURCE: when i accelarate fast i
i would check the u-joints they could be bad
Posted on Feb 18, 2011
Testimonial: "I will chech this tomorrow morning - I completely forgot about the u-joints - thx a lot - will mail back if this was problem"
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Here are the most common causes of idle surge, 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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