Why is my 1999 suburban k2500 still idling rough only when real warm?

Asked by Dec 17, 2014 at 07:39 AM about the 1999 Chevrolet Suburban K2500 4WD

Question type: Maintenance & Repair

1999 k2500 suburban 130k original miles, great shape well kep had for 3 years now.  Has idled rough for 4 months, replaced mass air flow sensor, Fuel pump (cuz it went bad), Pcv valve (shop said was bad) just got it out of the shop $900, and it still drops from 700 rpm to 400 rpm only when real warm. Only after driving for over 15 minutes straight.... Any help would be greatly appreciated ''  It's better (use to drop from 700 to almost 200rpm and lights would dim) but it is NOT GOOD ENOUGH
Thanks

1 Answer

5,095

Fuel pressure regulator? Vacuum leak? You do know a PCV valve is a $2 part and can be cleaned with carb cleaner? It hooks to a vacuum line.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Search Chevrolet Suburban Questions

Chevrolet Suburban Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 940
#2 Eric Fritz
Eric Fritz
Reputation 860
#3 Neal Turner
Neal Turner
Reputation 820
View All

Related Models For Sale

Used GMC Yukon XL
252 Great Deals out of 11,801 listings starting at $2,400
Used Chevrolet Tahoe
612 Great Deals out of 27,547 listings starting at $600
Used GMC Yukon
407 Great Deals out of 16,272 listings starting at $1,800
Used Ford Expedition
396 Great Deals out of 24,281 listings starting at $1,951
Used Cadillac Escalade
253 Great Deals out of 10,454 listings starting at $1,490
Used Chevrolet Silverado 1500
1,983 Great Deals out of 160,205 listings starting at $1,995
Used Ford F-150
2,401 Great Deals out of 210,250 listings starting at $895
Used Lincoln Navigator
91 Great Deals out of 5,496 listings starting at $3,900
Used Ford Excursion
12 Great Deals out of 700 listings starting at $3,995
Used GMC Suburban
136 listings starting at $3,500
Used Dodge Durango
244 Great Deals out of 22,762 listings starting at $1,499

Used Cars For Sale

2017 Chevrolet Suburban For Sale
6,638 listings starting at $37,036
2016 Chevrolet Suburban For Sale
43 Great Deals out of 2,749 listings starting at $35,000
2015 Chevrolet Suburban For Sale
26 Great Deals out of 1,359 listings starting at $28,888
2014 Chevrolet Suburban For Sale
15 Great Deals out of 563 listings starting at $17,990
2013 Chevrolet Suburban For Sale
44 Great Deals out of 797 listings starting at $15,499