First off, I would like to thank the community that is IH8MUD. I have spent countless hours reading on these forums the past two months and have gained a vast wealth of knowledge.
This happens to be my first post so I will try my best to be as thorough as possible.
To give some background...
92 Land Cruiser 3FE
192k
Failed Colorado emissions
runs rich
around 8mpg
new thermostat
new tps
new plugs/rotor/wires/dizzy
ect, maf, tps, o2, cats all check out...
The strange thing about this new addition to my toyota armada is that i cant figure out why the hell its running rich! So I come to you my trusted forum users.
This happens to be my first post so I will try my best to be as thorough as possible.
Here are the results for the emissions test:
HC 9.6 Limit 2.5
CO 242 Limit 25
CO2 617 Limit ----
NOx 2.0 Limit 4.5
Units are grams per mile (GPM)
Ok so here's the strange bit, I drove around monitoring my 02 sensors output voltage with a volt meter, it runs rich most of the time, but, when I am accelerating and then immediately let off the gas, the reading drops to about .1V???? Strange to me. Most of the time I get a reading of .9 to 1V. My FSM says that .9 should be the highest that it reads but it reads a tad higher. I don't believe that its a big deal but I could be wrong. The interesting thing here to me is that i get an immediate drop when i let off the gas... It only lasts one second but i know my O2 sensor works because of this drop. Also when the car is cold and its warming up, it takes the engine about 30 seconds to climb to achieve max O2 voltage. Again, strange... I think that maybe its a fuel pressure issue??? I don't know. I have also taken out the ECU and taken a look at the thing but couldn't see anything or smell anything in there that shouldn't be. I've heard these things are like tanks but i suppose it could be it.
Im about to run bk44 (i think that's what its called) through it in hopes that it will clean the injectors (a possible problem as well). Also gonna check the fuel pressure. BTW does anyone know where i can check the pressure with my "modified" 12mm by 1.25 banjo bolt? My Haynes manual sucks and I'm too poor to buy the real FSM
Any suggestions and help would be greatly appreciated!
salute!
This happens to be my first post so I will try my best to be as thorough as possible.
To give some background...
92 Land Cruiser 3FE
192k
Failed Colorado emissions
runs rich
around 8mpg
new thermostat
new tps
new plugs/rotor/wires/dizzy
ect, maf, tps, o2, cats all check out...
The strange thing about this new addition to my toyota armada is that i cant figure out why the hell its running rich! So I come to you my trusted forum users.
This happens to be my first post so I will try my best to be as thorough as possible.
Here are the results for the emissions test:
HC 9.6 Limit 2.5
CO 242 Limit 25
CO2 617 Limit ----
NOx 2.0 Limit 4.5
Units are grams per mile (GPM)
Ok so here's the strange bit, I drove around monitoring my 02 sensors output voltage with a volt meter, it runs rich most of the time, but, when I am accelerating and then immediately let off the gas, the reading drops to about .1V???? Strange to me. Most of the time I get a reading of .9 to 1V. My FSM says that .9 should be the highest that it reads but it reads a tad higher. I don't believe that its a big deal but I could be wrong. The interesting thing here to me is that i get an immediate drop when i let off the gas... It only lasts one second but i know my O2 sensor works because of this drop. Also when the car is cold and its warming up, it takes the engine about 30 seconds to climb to achieve max O2 voltage. Again, strange... I think that maybe its a fuel pressure issue??? I don't know. I have also taken out the ECU and taken a look at the thing but couldn't see anything or smell anything in there that shouldn't be. I've heard these things are like tanks but i suppose it could be it.
Im about to run bk44 (i think that's what its called) through it in hopes that it will clean the injectors (a possible problem as well). Also gonna check the fuel pressure. BTW does anyone know where i can check the pressure with my "modified" 12mm by 1.25 banjo bolt? My Haynes manual sucks and I'm too poor to buy the real FSM
Any suggestions and help would be greatly appreciated!
salute!