well when driving the afr will jump around,and the temperature gauge will jump around too,truck will jerk around.it did this before and ive replaced engine coolant sensors and every few months it will start again. could it be something else,i got a new sensor in there today and it didnt fix it at all. any help

thanks

 

Can you go into more detail on the coolant temperature jumping around? How quickly is it moving and have you checked its accuracy with a scan tool?

Could be the water pump getting ready to go out or a blocked up radiator if it is fluctuating slowly.

 

its jumping fast,very fast will jump up to 250 then all the way to cool,does this very fast. ive replaced the coolant sensor like 4 times,every time i did it would fix the problem for awhile then come back.but today when i put a new sensor in it just kept doing it

 

and the truck will jerk alot every time the temp hand jumps down,im guessing its adding too much fuel

 

Have you checked it with a scan tool? Could be the cluster going out.

 

no i havent checked it with a scan tool,if the cluster is going out would that cause it to add fuel like that,and make the truck run crappy

 

No, the cluster has nothing to do with that.

 

i didnt think so, i wouldnt think all the sensors im buying are bad ones lol,then again they are advance and autozone brand crap

 

Temp sensor probes rarely go bad. They're such a simple design that there really isn't much that could go wrong with them. The PCM gets signal from it in the form of voltage change or ohm resistance, so you might have some electrical noise or a bad wire somewhere causeing it to read funky.

 

has anyone ever had this problem,where should i look for the problem