fuel trim

[superdaddy]

just wondering if this was normal... when i let my car idle for a while the low fuel trim drops to like low 80's and then turns around and rises up to like 110 and the goes back....... maybe i should of post this in the newbie forum

 

[steve]

Does it happen to do this at the same rate that the fan is running?

Steve

 

[superdaddy]

as a matter of fact yes it does.........

 

[Brandon92DSM]

Does it happen to do this at the same rate that the fan is running?

Steve

Whats the significants of this? (I could guess but I want to hear it from the DSM Wiseman)

 

[steve]

Two things happen when the fan comes on. The alternator puts a load on the engine and the intake sucks up really hot air, more so on cars with the MAF can hacked.

If I have time later I try and go into more detail..

Steve

 

[superdaddy]

If I have time later I try and go into more detail..

Do you have time now???

 

[steve]

Do you have time now?

Sorry, I don't tonight. Sone change in trims because of the conditions mentioned changing is normal but the swing your seeing seems extreme. Is your car really stock? If not how about updating your profile with the specifics and maybe I can better understand why your getting so much of a swing. I don't usually see that much swing unless the AC is on.

What are your mid and high trims?

Steve