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catalatic converter

Discussion in 'Ford Trucks' started by dany, Feb 12, 2003.

  1. dany

    dany Member
    Messages: 89

    Not a ford but dont know where else to ask.

    Are catalatic converters supposed to glow cherry red? This is on a 92VW jetta 1.8L. After getting up to speed pretty quick in highway traffic as soon as i let off the car went putt putt a few times and died. You could start it back up and would do the same skipping deal. There is plunty of fuel and spark. The car after idleing would do the same thing a couple days befor and if you revved it up it would come out of it. So do u think athe cat is clogged?
  2. wyldman

    wyldman Member
    Messages: 3,265

    If the cat is glowing cherry red,then it is it raw fuel entering the cat,causing it to overheat.The cat is doing it's job as a catalyst,and burning up all the excess fuel which creates heat.The cat would probably now be damaged so it may have to be replaced.

    If it is plugged or has come apart,you will usually see a lack of power,but it won't usually get that hot.

    I would look for the cause upstream first,before replacing the cat.Leaky injector,O2 sensor,leaking or stuck fuel pressure regulator,ign misfire,etc,etc.
  3. Mr_Roboto

    Mr_Roboto Member
    Messages: 63

    I'd say it's clogged. If it is flanged on both ends, you can take it off and fab up a temporary bypass pipe to see if that fixes the problem. A temporary bypass is legal under Federal law for testing, you just can't leave it on permanently. (legally). Could be the car is running rich and sooting the converter, or it could just be plugged with age.