I have already asked about my reoccurring P1179 code, and hoping that the elusive MAF o-ring coming from Lucky8 will make a dent in that, but this morning when I went to clear my good morning P1179 from my UG, I had (2) additional codes P0300 - Misfire on multiple cylinders, and P1316 - Misfire Excessive Emissions Fault codes. Although I never noticed a misfire, I did notice the Disco seemed to be lagging a bit on one of the longer hills more than usual to the point the Disco had to downshift. I let the Disco sit for about 45 minutes, and it idled, but seemed to be missing & only at 550 RPM. A few seconds later (with no codes), and it straightened out returned to a normal 750 RPM & was fine again. I can't think of anything that would do that that I have not changed already (i.e., MAF, Air Intake Temp Sensor, Plugs, Wires, TPS, Fuel Temp Sensor, etc.).

 

Check and clean battery cables at battery, especially the ground , maybe remove all grounds clean and reinstall

Wen my dodge ram starts acting like this it is always fixed by cleaning the grounds, too much computer crap

 

You know Tom, you might be right! I was sitting here stewing on this & remembered the last time I had issues it was close to zero, and the temp dropped last night again; think it was 5 this morning. Wires shrink when it's cold, so perhaps the ground looses a bit more contact at these temps. If that's the case, tomorrow will suck as it's supposed to be -10 tonight. Oh boy!!!

 

Also the cold and a poor batt can cause computer glitches not getting proper voltage , I just did my rovers grounds and smeared dielectric grease made a huge difference

 

Battery is new (brother cranked the old one to death!!), so I know the top end of the ground cable is good. Guess I will need to bite the bullet, fight the cold & check out the other end of the ground cable. Oddly enough, it was -7 this morning & it ran perfectly with no codes at all. Go figure...

 

That ground goes to the fender then frame remove entire cable and clean all 3 ground points on cable and on rover, I also added a ground batt to read support and batt to engine also big difference

 

Really?? I thought it was just to the passenger's side front frame. Guess I will have to do some looking to see where the ground cable really connects. Live & learn!!

 

There is another from top bolt on starter to the body mount?

 

Okay, I will get that one too. I was just looking & the cables aren't that expensive. I might just replace them.

 

No need to replace just run the bolt through eyeson wire wheel, clean or new bolts and clean area they touch on rover