I have a genuine problem with my 56 plate Hyundai Tucson 2ltr diesel. When I bought it it ran and started great, but after about a week of using it I came out one sunny morning and it wouldn't start.

I tried the heater plugs a few times and got it started with a large amount of black smoke but soon the smoke cleared and it ran fine all day. This went on for about 5 to 6 weeks but now it will not run.

When I come to start it I turn the key and it starts on a not so good tickover between 5 and 10 on the Rev counter but that is all it will do- now it won't rev.

Someone suggested the pedal electrics so I changed the pedal but it made no difference.

  • Welcome to Motor Vehicle Maintenance & Repair! Sounds like glow plugs to me. Dec 28, 2018 at 22:12
  • Could be many things-glow plug failure, stuck egr valve, needs a scan
    – Andy swift
    Dec 29, 2018 at 10:16

1 Answer 1


If it is starting but idling poorly and not revving that would suggest the glow plugs aren't the issue, I'd be thinking EGR, either the valve itself or the control solenoid. They are a bit of a pain to get to on the Tucson (unless you are taller than me!) but easy enough to clean once off the car. WD40 should do the trick.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .