Spent the last couple of days reading threads about the issue and most never provided an outcome. Here is my situation and I promise to provide a definitive fix if possible.
-1994 LC
-280,000 miles
-Wires, cap, rotor changed at 194,000 (way too long but impressive what OEM can do)
-Spark plugs changed at 260,000
-Intake hose replaced 9 months ago
-CEL 71 for the last 8 years (changed modulator twice and then put a business card in front of light)
-CEL 26 which just happened 3 days ago
Was running great 3 days ago (600 rpm at idle and smooth) but then it started stumbling at idle (in park, neutral and drive). Idle dropping to below 400 rpm, dancing around 200 rpm. I can put into neutral and rev about 1,000 rpm and the engine smooths out, mostly (still feel a hiccup/miss).
Took it to my son's shop (he works for a mechanic) last night and replaced inboard O2 sensor (NTK) but could not get the outboard sensor nuts off (rounded and corroded). The stumble has gotten worst to the point of shaking the vehicle horribly at idle. His boss is going to start the diagnosis this morning and it appears there a tons of suspects for this type of issue.
Stupid question...
Has anyone had a 1993/1994 LC (ODB1) that has had a really bad idle issue just start out of the blue that found a definitive reason?
The past threads have listed these items as potential causes and we will work through them all until the culprit is found:
-Recent battery/EFI fuse disconnection
-Cracked intake hose
-Throttle body needs cleaning
-Vacuum leaks
-Spark plugs, wires, cap, rotor and coil needs replacing
-Fusible links having issues
-O2 sensors spent
-Catalytic converter clogged
-Fuel filter clogged
-Fuel pump not working
-Injectors bad
-Wiring harnesses at fire wall and ECU issues
-EGR system issues
Have I forgotten or missed anything? Once we have a verdict I will advise for future victims.
With the amount of years and miles on this amazing vehicle, whenever my Land Cruiser has a problem I gratefully thank the spent/broken part and replace with OEM if at all possible. I just want to find the son of bitch so I can thank it and move on!
Any help greatly appreciated.
Cheers!
-1994 LC
-280,000 miles
-Wires, cap, rotor changed at 194,000 (way too long but impressive what OEM can do)
-Spark plugs changed at 260,000
-Intake hose replaced 9 months ago
-CEL 71 for the last 8 years (changed modulator twice and then put a business card in front of light)
-CEL 26 which just happened 3 days ago
Was running great 3 days ago (600 rpm at idle and smooth) but then it started stumbling at idle (in park, neutral and drive). Idle dropping to below 400 rpm, dancing around 200 rpm. I can put into neutral and rev about 1,000 rpm and the engine smooths out, mostly (still feel a hiccup/miss).
Took it to my son's shop (he works for a mechanic) last night and replaced inboard O2 sensor (NTK) but could not get the outboard sensor nuts off (rounded and corroded). The stumble has gotten worst to the point of shaking the vehicle horribly at idle. His boss is going to start the diagnosis this morning and it appears there a tons of suspects for this type of issue.
Stupid question...
Has anyone had a 1993/1994 LC (ODB1) that has had a really bad idle issue just start out of the blue that found a definitive reason?
The past threads have listed these items as potential causes and we will work through them all until the culprit is found:
-Recent battery/EFI fuse disconnection
-Cracked intake hose
-Throttle body needs cleaning
-Vacuum leaks
-Spark plugs, wires, cap, rotor and coil needs replacing
-Fusible links having issues
-O2 sensors spent
-Catalytic converter clogged
-Fuel filter clogged
-Fuel pump not working
-Injectors bad
-Wiring harnesses at fire wall and ECU issues
-EGR system issues
Have I forgotten or missed anything? Once we have a verdict I will advise for future victims.
With the amount of years and miles on this amazing vehicle, whenever my Land Cruiser has a problem I gratefully thank the spent/broken part and replace with OEM if at all possible. I just want to find the son of bitch so I can thank it and move on!
Any help greatly appreciated.
Cheers!
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