engine missing and backfiring at times have replaced one coil.any info would be great and thanks.

 

back fires through the intake can be caused buy not enough fuel either buy the pcm not giving it enough or there isent enough "fuel pump". it can also be caused buy a clogged cat along with other things. dose it only happen at higher rpms or dose it back fire all the time.

 

thanks for your replay hickman123. today i replaced the crankshaft poistion sensor and that fixed the bad running.i hope this may help someone later. thanks again to this forum and its members.