1999 Chevy Suburban, 5.7 L. 148,000 miles, all power options #5 cylinder code

90

Asked by May 03, 2014 at 01:16 PM about the 1999 Chevrolet Suburban K1500 LT 4WD

Question type: Maintenance & Repair

My truck did not pass NH state inspection emissions test because:

bank 1, sensor 1- O2 sensor
#5 cylinder
check engine light was also burnt out

I replaced all 8 spark plugs, both front O2 sensors, cap & rotor and check engine bulb

I have not replaced plug wires, have not replaced air filter, did not replace coil pak
(but it's only one code for one cylinder) have not had oil changed yet, there is not
"rotten egg" smell.

No codes for O2 sensors, but, still a code for the #5 cylinder and the check engine
light is still on, I can clear it with a scanner, but within a mile it comes back on.

My truck runs like it's brand new- there is no "skip" or "miss" because of the #5
cylinder. Smooth acceleration, plenty of power, idles quietly.

If I clear the check engine light right before it is inspected will it pass? Does the #5
cylinder have anything to do with emissions?

3 Answers

16,255

I'm assuming when your saying code for the #5 cylinder you mean code p0305 cylinder 5 misfire. And IF that is the case your plug wire is a probable cause. Or the cylinder could have low compression.

90

Thank you. Hopefully it's not low compression, nothing seems to be indicating that it would be that right now, but I can certainly change the wires to start with. But, does the #5 misfire have anything to do with the emissions test? Is that a mechanical issue or an OBD inspection issue?

16,255

an emission inspection wont let you pass it you have any codes period. but a missfire will make the vehicle throw out more harmful emissions due to it running poorly. Try to find someone with a compression tester just to be sure

Your Answer

Add photo

Related Questions

Suburban

Looking for a Used Suburban in your area?

CarGurus has 21,723 nationwide Suburban listings starting at $2,000.

ZIP:

Search Chevrolet Suburban Questions

Chevrolet Suburban Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 850
#2 Eric Fritz
Eric Fritz
Reputation 840
#3 Neal Turner
Neal Turner
Reputation 740
View All

Related Models For Sale

Used GMC Yukon XL
388 Great Deals out of 13,082 listings starting at $2,400
Used Chevrolet Tahoe
1,100 Great Deals out of 31,962 listings starting at $1,495
Used GMC Yukon
543 Great Deals out of 17,622 listings starting at $1,777
Used Ford Expedition
629 Great Deals out of 23,213 listings starting at $1,100
Used Cadillac Escalade
385 Great Deals out of 10,994 listings starting at $2,995
Used Chevrolet Silverado 1500
2,705 Great Deals out of 148,971 listings starting at $995
Used Ford F-150
3,447 Great Deals out of 206,326 listings starting at $1,273
Used Lincoln Navigator
149 Great Deals out of 6,066 listings starting at $1,995
Used GMC Suburban
175 listings starting at $1,595
Used Ford Excursion
20 Great Deals out of 841 listings starting at $2,500
Used Dodge Durango
480 Great Deals out of 23,346 listings starting at $950

Used Cars For Sale

2017 Chevrolet Suburban For Sale
2,712 listings starting at $44,635
2016 Chevrolet Suburban For Sale
94 Great Deals out of 7,142 listings starting at $33,250
2015 Chevrolet Suburban For Sale
131 Great Deals out of 2,528 listings starting at $28,991
2014 Chevrolet Suburban For Sale
24 Great Deals out of 535 listings starting at $19,900
2013 Chevrolet Suburban For Sale
72 Great Deals out of 1,063 listings starting at $18,977