Question about Hyundai Elantra

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I change coil pack,transmission speed sensor but the engine still in rough idle

Rough idle,and when i shift to reverse or drive the engine more rough,i change the coil pack and transmission speed sensor but still the problem excess

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  • 13 Answers

Would search first inlet air leak in between air box and engine - all hoses on, clamps tight no cracks
then disconnect idler control - about where the engine accelerate cable comes in / most probably opposite. Problem still there?
look for ignition - plugs, check leads with multimeter, connections

Posted on Apr 18, 2014

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Posted on Jan 02, 2017

leetamara
  • 702 Answers

SOURCE: transmission won't engage/ no drive or reverse at all

It's definitely cheaper to buy a trans from a wrecking yard than to have yours rebuilt. Before you do anything though. Did you make sure that the trans fluid level is full? I know this may be a stupid question, but I had to ask. The speed sensors job is to tell the speedometer how fast you're going...not related to your problem.

Posted on Jul 03, 2008

  • 3 Answers

SOURCE: Chevy 1/2 ton 2wd 4.3 vortec rough idle tried everything I know

I had the same problem with my 96 Chevy 4.3. It idled rough enough to shake the truck at a stop. It revved up fine but sputtered on take off. My truck did not want to stay in overdrive because of the low rev. I changed cap, rotor, plugs, wires and this did nothing. Finally I took the intake off and found corrosion on the side intake gaskets near the rear of the engine causing a vacuum leak.

Posted on Nov 11, 2008

  • 11 Answers

SOURCE: 02 Neon won't shift out of second gear in Drive

Sounds like the valve body is loose, warped or blown

Posted on Apr 07, 2009

  • 18 Answers

SOURCE: Volvo S60 sensor ?

Sounds like an oxygen sensor (there are two). I had a recent problem where I had a rough idle and my S60 continued to stall out. Turned out to be the rear oxygen sensor. After replacement, car idles nicely and car drives normally.

Posted on Jun 30, 2009

  • 1 Answer

SOURCE: own a 1996 Grand AM GT 2.4 quad 4..manual...engine

engine missfire won't start

Posted on Dec 13, 2009

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Since you changed the sensor we will assume it is working. When you disconnect it you put the computer in limp mode which stops it from using sensor values. If code 300 is the only code we will assume the coolant temp sensor and others are ok.
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1998 Grand Marquis. Start goods. idols low. put in gear, stalls out. Changed fuel filter & had injectors serviced. Problem remains. Could it be the Transmission modulator valve?


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11_11_2011_10_58_29_pm.jpg

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Chrysler voyager automatic transmission problem


Sounds like you have yourself a bad shift solenoid pack this is mounted on the front of the transmission under a thick rubber boot and has an 8 or 10mm bolt holding a plug into it, these usually fail hot as it is an electronically controlled solenoid and there are tiny little springs and magnets inside that can stick also while you are in there do yourself a favor and change the two speed sensors on the transmission they are about $22 each and can also cause the problem you are explaining. the shift solenoid pack is about $120 on ebay and some sellers actually sell them along with the input and output speed sensors you may try changing those first and see if it solves it but i have a feeling your solenoid pack is failing also when you change these parts it may take the computer a few trips to relearn shift points but you'll know it fixed it right off the bat.. please rate and good luck -jeff

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