|
Author
|
Topic: FAILED smog !!!! need some help.
|
mustang928
¯
Member # 2123
|
posted
 
 
With my S10 truck... In april it failed the visual part smog.. Fast foward to today, now it passed the visual and failed the Emissions Test. The NOs were sky high this time.
Both the 15 MPH and 25 MPH were above 1000. In the first test they were well below the max, 15 mph was 202 and 25 mph was 340. What could of cause this.
It has a new cat, new plugs, wires, egr is good no injector leaks, could it be bad gas.
Posts: 333 | From: CALIFORNIA | Registered: Nov 2002
| :
|
|
1FAST89GT
¯
Member # 5071
|
posted
sounds like the cat didn't light off get it nice and hot and try it again
Posts: 4915 | From: VALLEJO | Registered: May 2004
| :
|
|
stanger50
20yr club
Member # 1665
|
posted
i had the same issue. i changed out the n02 sensor and it passed with flying colors.
Posts: 1318 | Registered: Aug 2002
| :
|
|
mustang928
¯
Member # 2123
|
posted
Yeah, going to drive a bit and then take it again. Don't want to swap out the o2 sensor, not getting any codes for it.
Posts: 333 | From: CALIFORNIA | Registered: Nov 2002
| :
|
|
NonOpSlow2V
¯
Member # 6111
|
posted
Go haul ass on the free way, warm the cats and give it another shot at smog...Good Luck
--------------------
1997 Autumn Orange GT vert
1996 Mystic Cobra
2005 95ci Harley Road King
2011 F150 Raptor
Posts: 2139 | From: San Francisco | Registered: Oct 2005
| :
|
|
Adam5.0
¯
Member # 6995
|
posted
high miles??? possible carbon build up on pistons. time for sea foam
--------------------
want something old and japanese
Posts: 1609 | From: Brentwood | Registered: Aug 2006
| :
|
|
Stangs R Us
¯
Member # 4495
|
posted
make sure u leave the car running while your there waiting also , and take it on a nice drive
Posts: 3100 | From: sacramento | Registered: Aug 2005
| :
|
|
S351-R
CAFords OG
Member # 1605
|
posted
quote:
Originally posted by mustang928:
It has a new cat, new plugs, wires, egr is good no injector leaks, could it be bad gas.
EGR valve may be good but is the EGR system actually functioning? Verify that vacuum is going to the EGR controls and vacuum is getting to the EGR valve. Check the EGR ports and make sure they are not restricted or plugged. A quick check for the EGR valve and ports is to apply vacuum to the EGR valve with the engine running. The engine should sputter (or possibly stall) when the EGR valve opens. Your excessively high NOx readings tells me the EGR system is not functioning properly (if HCs and COs are good).
[ July 23, 2009, 03:30 AM: Message edited by: S351-R ]
Posts: 344 | From: Earth | Registered: Jul 2002
| :
|
|
mustang928
¯
Member # 2123
|
posted
Finally took the S10 to get smogged on friday and it passed!! REALLY appreciate the help... Cleaned the EGR (electronic EGR), cleaned the upper intake and refilled the truck with 91 gas, instead of 87 gas. Although the problem might have been that the bolts that connect the header to the exhaust were loose. It was actually missing 1 of the 3 bolts.
Did drive it for 20 minutes on the fwy before I went over to the smog station, but yeah it PASSED ![[dance]](graemlins/dance.gif)
Posts: 333 | From: CALIFORNIA | Registered: Nov 2002
| :
|
|
Email this post to someone!
Printer friendly view of this Ford topic
