2005 Chevrolet Impala Q&A
2005 Chevrolet Impala Question: Replaced catalytic converter check engine light is still flashing what to do??
Catalytic converter was stopped up replaced it and it runs fine for a little while and then my check engine light starts flashing and it won't take my gas and starts jerking then I turn it off come back couple hours later and starts up runs fine again until I drive it a little while then starts doin same thing over again don't know what else to do to fix it checked for vaccum leak also - mirandanandai
Check engine light should be on! Have it scanned and post codes so we know more about the engine misfire that you have! Ever changed plugs/wires? How many miles on car? Need to fix this ASAP so it doesen't trash this cat. convert. - pushrod
Of course plugs and wires can definetly cause this issue. So can a vacuum leak. Need to check the hoses around the pcv breather and others to see if cracks or holes are present. Best way is to start vechicle and spray something like b-12 chemtrol or any carb cleaner on the hose and see if the vehicle changes in operation. Post the exact codes on here to further assist you. - csubak30