so my 1992 5.7 suburban's egr valve is opening and closing every 5-10 seconds

Asked by Oct 09, 2016 at 07:01 PM about the 1992 GMC Suburban

Question type: Maintenance & Repair

So I have replaced o2 and cleared code, no new codes, EGR valve is opening
and closing every 5-10 seconds cold or hot causing engine to surge at idle
runs fine at speed, any ideas ? I have not replaced the EGR controller yet, but
I have cleaned both EGR and IAC. I can see the EGR cycling and it is the
cause of the surge if I unhook vacuum line it stops of course.

No answers yet

Your Answer

GMC Suburban Experts

  • #1
    LouB
    Reputation
    1,420
  • #2
    ShadetreeMech
    Reputation
    230
  • #2
    Larry Thibert
    Reputation
    230
View All

Related Models For Sale

Used Chevrolet Suburban
506 Great Deals out of 24,320 listings starting at $1,799
Used GMC Yukon
616 Great Deals out of 20,554 listings starting at $2,500
Used GMC Sierra 1500
1,228 Great Deals out of 64,898 listings starting at $999
Used Ford F-150
3,302 Great Deals out of 224,487 listings starting at $1,200
Used Ford Explorer
1,263 Great Deals out of 70,145 listings starting at $1,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.