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  #1  
Old January 4th, 2016, 10:06 AM
bdavis2188
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Brian
1997 D-90
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Sputter & Stall

My D-90 has been running great but on a recent start it began sputtering and went to stall out with more acceleration. It starts fine and idles great. The sputtering increases with the amount of gas I give it.

I ran a diagnostic and the following fault codes appeared:

P1190 Oxygen Sensor Heater Type 2 Low Resistance Upstream
P1187 Oxygen Sensor Heater Circuit Short Upstream
P0157 Oxygen Sensor Low Voltage *Codes* B D
P1317 ABS Rough Road Line Low Fault
P3999

Any idea what is causing this? Is this a major issue?

Please help!

Thanks
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  #2  
Old January 4th, 2016, 10:19 AM
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Joshua
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Judging by the fault codes and your description have you started with the oxygen sensors? I believe the 1997s have both pre-catalytic converter sensors and post-cat sensors, for a total of 4.
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  #3  
Old January 4th, 2016, 10:54 AM
bdavis2188
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Brian
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Quote:
Originally Posted by rijosho View Post
Judging by the fault codes and your description have you started with the oxygen sensors? I believe the 1997s have both pre-catalytic converter sensors and post-cat sensors, for a total of 4.
Thanks! I'll start there

Do you happen to know if there is a big difference in the parts? I found these for $264.00 for a set of 4 made by Walker
97 1997 Land Rover Defender 90 Oxygen Sensor - Fuel Injection - Bosch, Denso, NGK, NTK, Walker, Downstream, Downstream Left, Downstream Right, Upstream, Upstream Left, Upstream Right - PartsGeek

Also found Bosch for $343 for a set of 4 and a kit on Rover Parts for $429 (Rover Oxygen Sensor Kit - Discovery, D90 And Range Rover)
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  #4  
Old January 4th, 2016, 11:22 AM
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Bill Adams
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O2 sensors do not come into play until after the engine has gone thru initial warm up period. If it is sputtering on start up it will not be o2 sensors.
Stumbling on acceleration I would first look for vacuum leak, bad TPS, Bad IAC. Stumbling usually bad fuel mix (starvation) from air leak or other anomoly.
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  #5  
Old January 4th, 2016, 11:26 AM
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Quote:
Originally Posted by o2batsea View Post
O2 sensors do not come into play until after the engine has gone thru initial warm up period. If it is sputtering on start up it will not be o2 sensors.
Stumbling on acceleration I would first look for vacuum leak, bad TPS, Bad IAC. Stumbling usually bad fuel mix (starvation) from air leak or other anomoly.
Or bad catalytic converter(s) (therefore fouling the O2 sensor(s)), no?
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  #6  
Old January 4th, 2016, 11:33 AM
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Bill Adams
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You can run just fine without O2 sensors even being connected, so prolly not, unless the cats are clogging the exhaust which is also a possibility.
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1966 109 5 door wagon 300Tdi "spermaceti fueled"
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  #7  
Old January 4th, 2016, 12:46 PM
bdavis2188
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Brian
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Quote:
Originally Posted by o2batsea View Post
You can run just fine without O2 sensors even being connected, so prolly not, unless the cats are clogging the exhaust which is also a possibility.
any way to test this to see where the trouble is before I drop the cash on the O2 sensors?
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  #8  
Old January 4th, 2016, 11:48 PM
Departing90
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Whooooa......
If tye issue is indeed O2 sensors they NEVER all go bad at the same time!
Often times there are residual codes in the ecu or anomalies of different kinds for multiple codes to come up but not unheard of. The proper cource of action is to clear tye codes, wait tye check engine light to illuminate tyen read them again to confirm.......
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  #9  
Old January 5th, 2016, 12:28 AM
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Chris Davis
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I would Agree with Bill. Particularly a vacuum leak.
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  #10  
Old January 5th, 2016, 03:24 PM
bdavis2188
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Brian
1997 D-90
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I have it in the shop now... we shall see about the vacum leak and O2 sensors but my mechanic says the wires are arcing and he is replacing them, the plugs, and cleaning out the throttle body as a 1st COA
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  #11  
Old January 5th, 2016, 04:35 PM
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