98 running rich

[popcorn501]

My 98 z-71 is running rich any idea why? It has both new front o2 sensors. Thanks

 

[Blue 04 Z71]

Coolant temp sensor in the front of the thermostat.

 

[popcorn501]

Oh does it have two one for the gauge and one for the ecm?

 

[bobfig]

thats the one for the ecm. the one for the gauge is in the driver side head.

 

[popcorn501]

Ten four thanks

 

[Horns]

You may want to check the actual thermostat that's in the truck. Maybe it's got a really cold one so it's running rich.

 

[trailer-trash]

you may want to check your spider valve also....I smelled fuel all the time..especially on a cold start so I dismissed it for a while...My spider was leaking.

 

[popcorn501]

Spider and thermostat are fairly new. Replaced last year when I put the new engine in.

 

[popcorn501]

Well I finally got around to messing with my truck the other day and I hooked my scanner up to it and the scanner says it is running at 194 while the gauge reads about 160 so I'm thinking there is nothing wrong with the temp sensor up front Any other ideas why it might be running rich?

 

[SAATR]

Do you have a rich code or does it just smell rich? Is it blowing black smoke? Poorer than normal fuel economy? What tells you that it's rich?