1992 Ford Ranger wont pass smog

1992 FORD RANGER

200,000 MILES • 6 CYL • 4WD • AUTOMATIC

SHOGOX10

MEMBER
4 POSTS

my ford wont pass smog i pulled up the codes off it
an it cam up with a 171 an i looked it up an it says something a bout a map sensor but i cant find it

Mar 24, 2009 at 9:19 AM

RASMATAZ

✓Experienced Mechanic
75,988 POSTS

Which engine do you have 2.9/3.0/4.0L???

Mar 24, 2009 at 9:28 AM

SHOGOX10

MEMBER
4 POSTS

the 4.0 its also coming up with high CO

Mar 24, 2009 at 9:30 AM

SHOGOX10

MEMBER
4 POSTS

[quote:638225c405="rasmataz"]Which engine do you have 2.9/3.0/4.0L???[/quote:638225c405]

the 4.0 its also coming up with high CO

Mar 24, 2009 at 9:49 AM

RASMATAZ

✓Experienced Mechanic
75,988 POSTS

High carbon monoxide (CO) emissions are a telltale sign of a rich fuel mixture. On older carbureted vehicles, fuel-saturated plastic floats, incorrect float settings, leaky power valves and misadjusted chokes are often responsible for the rich mixture. On newer vehicles with feedback fuel controls and fuel injection, leaky injectors, excessive fuel pressure and sluggish or contaminated O2 sensors are all possibilities to investigate.

Mar 24, 2009 at 10:05 AM

SHOGOX10