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Author
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Topic: car wont smog running rich
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migs66/92
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Member # 4811
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posted
 
 
help guys my 92 5.0 wont pass smog the tech said its running to rich what or where should I start.
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Ill keep my guns and my money, you can have the change
Posts: 343 | From: lodi ,cal | Registered: Aug 2004
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1fast281
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Member # 4670
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posted
what mods do you have? how old are the 02 sensors?
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1998 Mark VIII LSC Black/Graphite
2005 Pontiac GTO Silver/Black
Posts: 578 | From: north bay | Registered: Jul 2004
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Fostang
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Member # 3752
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posted
have you given the thing a basic tune up?
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67' Fastback TT 408
67' Camaro Lsx
64' Corvette Fuelie
57' Chevy Bel Air Lsx
68’ Pony Convertible
66’ Pony Coupe
Posts: 3012 | From: Stockton/Danville | Registered: Nov 2003
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FasterDamnit
Bad Attitude
Member # 442
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posted
Post your smog test results and COMPLETE engine combo.
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'92 LX T5
Looked stock, went 11's 11.90 at 115mph.
'65 Mustang 347
www.fordmuscle.com
Livin' in the Carolina Pines
Posts: 2971 | From: NorCal | Registered: Sep 2001
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Blind
2.3L
CAFords OG
Member # 3052
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posted
is it not true that an AFPR will cause you to fail visual smog check?
I'm having similar problems, and replacing the o2 sensors, the o2 harness, and the ECT has not seemed to help ![[Mad]](mad.gif)
currently I'm going to MAF (from SD) on my car in hopes that the new computer will throw codes, my SD computer has no codes in it ever, even when one of my plug wires popped off and it was running like shit ![[Roll Eyes]](rolleyes.gif)
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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migs66/92
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Member # 4811
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posted
its your basic 5.0 no mods had it since may 04 first thing i did gave it a complete tune dont know how old the o2 sensors are
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Ill keep my guns and my money, you can have the change
Posts: 343 | From: lodi ,cal | Registered: Aug 2004
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FasterDamnit
Bad Attitude
Member # 442
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posted
quote:
Originally posted by FasterDamnit:
Post your smog test results and COMPLETE engine combo.
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'92 LX T5
Looked stock, went 11's 11.90 at 115mph.
'65 Mustang 347
www.fordmuscle.com
Livin' in the Carolina Pines
Posts: 2971 | From: NorCal | Registered: Sep 2001
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AcesWild85
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Member # 2616
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posted
what kind of thermostat is in it? If the engine is running a litte too cold it will also run a little rich ( to try to warm up the engine )
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College student and U.S. Marine; The possibilities are endless...
Mustangs aren't built; they're born!
Posts: 844 | From: San Jose, CA | Registered: Mar 2003
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92stangLX
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Member # 3252
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posted
It really depends on what test you are failing. My 92' has most of the basic bolt ons (intake, injectors, maf, TB, exhaust, FPR, etc) and it was failing the NOX. The mechanic told me to change the cats *and* the EGR. I changed just the EGR ($110 fucking bux!) and it passed.
Not knowing what you are failing I would say tune the car (dist cap, fuel filter, plugs, wires, PCV), make sure your timing is at 10 degrees, clean the EGR valve, and change the oil. Also make sure the car is above operating temp before you test and go for it.
Is your check engine on?
Posts: 5302 | From: San Francisco | Registered: Sep 2003
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Blind
2.3L
CAFords OG
Member # 3052
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posted
I failed for HC and COx, hense the running rich complaint.
I believe running lean results in high NOx readings and/or bad cats, and in your case EGR ![[Smile]](smile.gif)
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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