p1177 and p1179
#1
p1177 and p1179
Title says it all. I believe that these are for FMFR and AMFR. MAF is clean, plugs and wires are new. MAF seems to be about 3 years old. Fuel pump is also new. I did all of this work about a week ago, and I started getting these codes yesterday. No performance issues whatsoever. Getting about 13.5mpg on 91 octane (highest octane in CA) with only city driving. Does anybody know how to fix this?
Thanks
Edit: Long term fuel trim: -24.2%
Short term fuel trim hardly goes above +/-5%
Thanks
Edit: Long term fuel trim: -24.2%
Short term fuel trim hardly goes above +/-5%
Last edited by DiscoCam; 05-29-2017 at 07:15 PM.
#2
Title says it all. I believe that these are for FMFR and AMFR. MAF is clean, plugs and wires are new. MAF seems to be about 3 years old. Fuel pump is also new. I did all of this work about a week ago, and I started getting these codes yesterday. No performance issues whatsoever. Getting about 13.5mpg on 91 octane (highest octane in CA) with only city driving. Does anybody know how to fix this?
Thanks
Edit: Long term fuel trim: -24.2%
Short term fuel trim hardly goes above +/-5%
Thanks
Edit: Long term fuel trim: -24.2%
Short term fuel trim hardly goes above +/-5%
#4
just my 2 cents but start with the GEM's Land Rover Discovery work book to confirm what the norms are for your Oxygen Sensors compared to what they are reading. You could be needing some new 02 sensors.
From what I recall reading your long term trims seen low I think that is what the 1179 is indicating.
just 2 cents
From what I recall reading your long term trims seen low I think that is what the 1179 is indicating.
just 2 cents
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DiscoCam (05-30-2017)
#5
just my 2 cents but start with the GEM's Land Rover Discovery work book to confirm what the norms are for your Oxygen Sensors compared to what they are reading. You could be needing some new 02 sensors.
From what I recall reading your long term trims seen low I think that is what the 1179 is indicating.
just 2 cents
From what I recall reading your long term trims seen low I think that is what the 1179 is indicating.
just 2 cents
Thanks
#7
O2 sensors for a D1 w/ AEL (being a 99 yours has AEL)
https://www.amazon.com/dp/B001PNG622...=3SZYBJV1LFLYW
https://www.amazon.com/dp/B001PNG622...=3SZYBJV1LFLYW
#9
I think it does have a "learning curve" from what I have seen, but that may not be a proven fact.
My MAF proved to be the cause only after I changed 3 of the 4 o2 sensors. There was a slight change in values (higher) on my 2 downstream readouts when I changed MAF's and the 1179 stopped popping up.
I would drive it for a while to see and maybe swap with another MAF if available to see if it makes a difference.
My MAF proved to be the cause only after I changed 3 of the 4 o2 sensors. There was a slight change in values (higher) on my 2 downstream readouts when I changed MAF's and the 1179 stopped popping up.
I would drive it for a while to see and maybe swap with another MAF if available to see if it makes a difference.
#10
Just drove it about 30 miles. No CEL, no P1179, but still a pending P1177. MAF sensor is about 3 years old so I'm a little hesitant on replacing it. But if the CEL comes back, then that will most likely be my next move.
If the code stays as pending and CEL doesn't come on, then I'll just leave it alone. But I'm pretty sure that the CEL will come on any time now.
If the code stays as pending and CEL doesn't come on, then I'll just leave it alone. But I'm pretty sure that the CEL will come on any time now.