- Location
- Green Valley, CA
First off, I apologize cause this will likely be long.
I got a 98 XJ with 196K on the clock not too long ago. The check engine light wasn't on, but the backup lights didn't work, and the thing only started in Neutral. It would start in Park if it felt like it. So, I searched and came up with the NSS removal, cleaning, and adjustment procedure. I did this... put it back in, according to the correct adjustment procedure. Then, it tripped the check engine light.
Now, I drove it maybe 5 miles before I did this with no check engine light. Then I did the NSS fun, and the CEL came on. I called codes and got a lean mixture code, and 3 transmission control codes (sorry don't have the actual numbers handy)
Anyway, since then I smogged it, and it failed horribly in every catagory (again sorry, no numbers). It smells bad, I have smoke coming out of it, so I wasn't too shocked.
At this point, I've now driven it like 100 miles, I've gotten an average of 6.8 miles per gallon with half highway and half city driving. I've adjusted the NSS 3 times now, and still get the 3 check engine codes in addition to the lean engine condition code.
My questions are:
1) Would adjusting the NSS cause a horrible gas mileage/rich condition?
2) If not, would an O2 sensor possibly cause this bad of mileage?
3) would the coolant temp sensor possibly do that?
I've not checked the compression on it yet, hoping to do that tomorrow... but it doesn't seem to be burning oil, no oil apparent in the coolant, no coolant apparent in the oil.
Yeah, I've searched... but really this is the worse mileage I've seen or heard of and I'm doubtful of a simple sensor causing this crappy of mileage.
I got a 98 XJ with 196K on the clock not too long ago. The check engine light wasn't on, but the backup lights didn't work, and the thing only started in Neutral. It would start in Park if it felt like it. So, I searched and came up with the NSS removal, cleaning, and adjustment procedure. I did this... put it back in, according to the correct adjustment procedure. Then, it tripped the check engine light.
Now, I drove it maybe 5 miles before I did this with no check engine light. Then I did the NSS fun, and the CEL came on. I called codes and got a lean mixture code, and 3 transmission control codes (sorry don't have the actual numbers handy)
Anyway, since then I smogged it, and it failed horribly in every catagory (again sorry, no numbers). It smells bad, I have smoke coming out of it, so I wasn't too shocked.
At this point, I've now driven it like 100 miles, I've gotten an average of 6.8 miles per gallon with half highway and half city driving. I've adjusted the NSS 3 times now, and still get the 3 check engine codes in addition to the lean engine condition code.
My questions are:
1) Would adjusting the NSS cause a horrible gas mileage/rich condition?
2) If not, would an O2 sensor possibly cause this bad of mileage?
3) would the coolant temp sensor possibly do that?
I've not checked the compression on it yet, hoping to do that tomorrow... but it doesn't seem to be burning oil, no oil apparent in the coolant, no coolant apparent in the oil.
Yeah, I've searched... but really this is the worse mileage I've seen or heard of and I'm doubtful of a simple sensor causing this crappy of mileage.