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

Add photo

Related Questions

Search GMC Suburban Questions

GMC Suburban Experts

#1 LouB
LouB
Reputation 1,290
#2 Larry Thibert
Larry Thibert
Reputation 190
#3 ShadetreeMech
ShadetreeMech
Reputation 160
View All

Related Models For Sale

Used Chevrolet Suburban
3 Great Deals out of 295 listings starting at $2,871
Used GMC Yukon
9 Great Deals out of 664 listings starting at $6,499
Used GMC Sierra 1500
149 Great Deals out of 7,483 listings starting at $2,178
Used Ford Explorer
25 Great Deals out of 969 listings starting at $3,985
Used Ford F-150
348 Great Deals out of 6,985 listings starting at $2,100

Used Cars For Sale