Engine light goes on and off

Asked by Jun 14, 2016 at 01:59 PM about the 2007 Hyundai Tucson

Question type: Maintenance & Repair

Car has almost 50,000 miles.  It will be running fine  
at 50-60 mph, then engine light goes on, it starts to
run rough, sometimes stalls and I have to floor it to
go 40 mph for 2-3 miles.  Then I start to take my
foot off the gas and it speeds up and runs
smoothly.  Engine light has gone off.  Weird.

1 Answer

4,915

...guessing the oxygen sensors before and after the catalytic converter are getting plugged...must check the intake temp sensor IAT (a small wire that contracts with cold)~ these can burn out and the ECU doesn't know what to do (rhymes)~ ever change the air filter or spark plugs...bout time for a replacement timing belt and tensioner~ do you maintenance...and you will not have a plugged converter~

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