My XR4x4 2.9 has been running a little rough from cold recently. This problem is slowly gettign worse and it started popping and banging when cold. Then when idleing the revs started to fluctuate between 400 and 1600 and now it wont even run. As soon as i start it it stalls.

Have checked

spark plugs
cleaned leads but not replaced
cleaned icsv
got a fault code reading of 36 which is air flow meter votage but checked these and voltage is spot on and have physically watched the meters opening and closing.

Any ideas would be most welcome.

cheers

 

try the coolant temp sensor for the engine management it is under the throttle bodies and the throttle position sensor. mine had similar symtoms i fault code read mine several times and nothing showed up untill i pluged in the code reader from stone cold overnight and it showed up. these are the two common faults i have encounted with the 2.9EFi. temp sensors are around £15 and throttle pots around £50 if i rember correctley
hope this helps
cheers nick.