Mar 292016

1997 Hyundai ElantraMy Hyundai Elantra has an intermittent flat spot. Engine cylinder head repairs done, oil change, oil filter change, plugs, ht leads, fuel filter. No vacuum leaks found. injector spray pattern good. Your assistance will be greatly appreciated


Being intermittent can cause you to want to pull your hair out at times. It causes things on your Hyundai Elantra to test good one time and bad at others. Ultimately making it more difficult to narrow down. In most cases you can continue to drive the car until the problem becomes more frequent.

Hyundai Elantra intermittent flat spot

My thoughts on this particular instance lean toward the head repairs and why you might need head repairs done in the first place. I am guessing the timing belt broke and damaged the valves. This is common enough, but maybe not all the valves were replaced and one is still slightly bent. As it moves around it will cause a slight flat spot as the valve cannot seat properly.

Mar 042016

2004 Hyundai Sonata
Having problem with my heater controls inside my car but the AC doesn’t work with the controls either. So I’m thinking its a short in the dashboard control panel switches but wanted to make sure before I pull the dash apart.

I am thinking if it doesn’t blow air out the dash at all on any speed setting that you have a possible blower motor issue (check the “blower fuse” located in the under hood fuse block). Only blows on High speed would be a blower motor resistor issue. Stuck on hot or cold would be an actuator issue. Stuck on defrost/dash/floor would also be an actuator issue. No signal going tot he actuators would be a control panel issue. If you decide to dig into the dash these instructions may help save you a little time.

Control Panel Removal & Installation

  1. Remove the front console cover.
  2. Remove the screw, and detach the clips.
  3. Disconnect the following items to remove the center fascia panel (A).
    • Hazard warning lamp connector (B).
    • Rear defroster connector (D).
    • Windshield deicer connector (C).
    • Front fog lamp connector (E).
      dash control panel removal diagram

      Control panel connectors diagram

  4. Remove the audio assembly.
  5. Loosen the screws.
  6. Remove the heater control unit (A).
    Heater control panel unit diagram

    Heater control unit diagram

  7. Installation is the reverse of removal.

    Make sure all the connectors are plugged in properly.

Air conditioning troubleshooting

Feb 262016

Hyundai Accent
Drove through water, car stalled. Air filter was soaking wet. We replaced air filter and changed the oil (no water in oil) but car is ticking, what should I do?

Nov 272015

2011 Hyundai Elentra
Gear shift will not shift to low gears. trans shifts normal is all other gears. I think the selector is a electronic shift on the fly system? Does the shifter operate a sensor or relay to the trans. Where is it located if you know? thanks.

Nov 122015

2001 Hyundai Tiburon
I was driving today and my car just started cutting back. it wouldn’t get over 30 mph. and when I would try to accelerate my speed would drop instead. any ideas on what could be wrong?

Nov 122015

2012 Hyuandai H1 Minibus
My check engine light is on, the computer say it the starting sensor I have change it reprogram the vehicle computer drive for ten minutes switch off the engine and when I start up again it comes on and stay on, what is causing this?