Question about Hyundai Cars & Trucks
Connect a vacuum gauge to the engine. Sparatic movement would indicate a valve problem in most cases. A major vacuum leak will cause stalling, or no idle, back vacuum line is broken or loose, brake booster is bad, bad intake gasket, cracked intake, or head, bad gasket under the Throttle body, Listen under the hood when it is running an listen for hissing,
A bad engine sensor, MAF sensor, bad plug wires (look for sparking in the dark), bad computer, many things, wrong gas, bad throttle sensor, failed coil or coils,
Best to use the engine codes to identify, if no codes, check the first items.
Posted on May 03, 2017
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Posted on Jan 02, 2017
tried testing the igniter also i would look into the injector, that will cause a single cylinder misfire and probably is your problem?misfires are not noticeable at higher speeds, which im sure you know but i would go that route, could have a pinched injector or a stuck one. one easy way to test is swap 3rd injector with another and see if that one starts misfiring instead, another rought is to get a cheap auto stethoscope and put it to each injector to hear if its opening and closing, compare with others. good luck.
Posted on Dec 11, 2008
The turbine shaft speed sensor can cause this problem, It is also know as the transmission input shaft speed sensor. It will cause the transmission to **** and also stick in 3rd gear, which wound cause slow acceleration.
Posted on May 18, 2009
The cam chains have developed slack and are slapping on the cam chain guides which helps prevent the cam chains from popping off in case of slack developing . The chain guides are made of some type of plastic material and develop significant wear.
Posted on Feb 26, 2010
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