EGR Tubes clogging up
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HT4100 4.1, 4.5, 4.9 Discussion, EGR Tubes clogging up in Cadillac Engine Technical Discussion; recently had an EGR code. took this forums advice and cleaned out the EGR tubes in the throttle body. now ...
  1. #1
    primerib is offline Cadillac Owners Member
    Automobile(s): 95 Deville
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    EGR Tubes clogging up

    recently had an EGR code. took this forums advice and cleaned out the EGR tubes in the throttle body. now it seems they are gunking up again. what would make these tubes gunk up after just a month or two?

    4.9L engine

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: EGR Tubes clogging up

    Well, they do flow exhaust gases, but it should take years to close up again.

  4. #3
    HUF's Avatar
    HUF
    HUF is offline Cadillac Owners Connoisseur
    Automobile(s): 1995 FWB 100,*** miles CURRENT. 1991 Seville 175,000 SOLD
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    Re: EGR Tubes clogging up

    Quote Originally Posted by primerib View Post
    recently had an EGR code. took this forums advice and cleaned out the EGR tubes in the throttle body. now it seems they are gunking up again. what would make these tubes gunk up after just a month or two?

    4.9L engine
    Short trips? Barely touched gas pedal?

  5. #4
    Dave S Texas's Avatar
    Dave S Texas is offline Cadillac Owners Enthusiast
    Automobile(s): '87 Coupe DeVille 4.1L FWD(New engine '08) 1981 F100 '03FXDL
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    Re: EGR Tubes clogging up

    WOT treatment might be just the curative. Plenty of info on the subject in the forum 'sticky'

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