Hello Mr.Scotty. I have an 04 Crown Victoria p71. I got it with 146k miles and until recently it…

Aaronmann

Hello Mr.Scotty.

I have an 04 Crown Victoria p71. I got it with 146k miles and until recently it has given zero problems. I replace things when needed and I always check on things to see if the need replacing. I recently did an intake manifold replacement due to the old one starting to leak. I caught it early so no damage from that. Rode a week then decided to replace the coils due to one bad one. I did not notice that one clip was missing a holder so it came lose and I did not know it until I notice a big drop in gas mileage about a week after the change. I check around and see my oil smells like gas. I figured out that the coil was unplugged but the injector was still running. I went from an average of 300 miles per tank to 225-250 per tank which is a big drop..about 20-25 mpg down to 12-15mpg. What may have damaged? I replaced the MAF sensor which was the only thing showing bad on a scan tool other than an O2 sensor stuck lean(which has been that way for 20k miles since I got it). I need help. Did I damage it beyond help or any ideas? Thanks much

Comments (2)
Aaronmann
Aaronmann

Thank you. I will certainly check this Thursday. I have had codes cleared twice already. With it being an old police car I'm not sure how well or how bad it was run. I'm positive that the exhaust is stock though. That lean code has been on forever and don't assume it is the problem unless it has totally gone out or killed converter. I've been nice to it and would hate to get rid of it or it die.

No. 1-2
user456101
user456101

I don't think you damaged it from running it that way for such a short period of time. The O2 sensor lean reading could mean you have a vacuum leak somewhere. I would get the codes cleared for free at a place like AutoZone first. If it comes back, I would look for a vacuum leak and if I didn't find one I would replace the O2 sensor. with one from a junkyard (because they should last the lifetime of the car and they are really cheap at a junkyard). Running lean will eventually burn out the catalytic converter and that is expensive (unless you get one from the junkyard). Here are some videos that might be helpful https://www.youtube.com/watch?v=zMok2y05jNE&vl=en https://www.youtube.com/watch?v=pMkQNYkKJfU https://www.youtube.com/watch?v=h8rxpfRvHf8