AFR?? 99 dakota R/T
 

first off im sorry if this is in the wrong section. whats everyones AFR?? mine is VERY rich. its around 10.1 and as low as 9.8. how do i lean it out so i can put more timing in it??? this is my first dakota R/T so IDK if the ECU controls this or how i can change it

Thanks

Brian

RE: AFR?? 99 dakota R/T
 

That is on the high end. The ECu controls timing, but does require a timing light and DRB to check it. Do you have an engine light on?

RE: AFR?? 99 dakota R/T
 

First off what's wrong with your truck? It should never be that far out of whack. Have you substantially modified anything? If t's basically stock I'd say your O2 sensor or your MAF sensor is dead, or you've got injectors stuck open. My 5.0 runs about 14-15:1 at cruise and as soon as I hit the gas it jumps to 11:1, but I'm running injectors that are way too big right now.

RE: AFR?? 99 dakota R/T
 

yeah thats on the high end. thats the AFR's the dyno was reading. all it has is a hypertech power programmer III, flowmaster catback and K&N drop in. no CEL on. it seems to run fine. just was showing real rich on the dyno. do my numbers seem bad?? 181 HP and 250 torque

RE: AFR?? 99 dakota R/T
 

181/250 doesn't sound too bad. My ram put 173/251 to the ground, but it's got a cam, intake manifold, headers, no emissions, etc. I'd expect maybe a little more though from a Magnum 360.

Regardless of the CEL not being on, something is wrong. I'd look into the O2 sensor(s) as they don't always throw a code when they're going out and it could cause whacky A/F ratios.