80 series running rich (1 Viewer)

[Wywill]

I have a 94 80 series with a 1fz-fe and it is just dumping fuel reeks of gas when running backfiring out of the exhaust, super slow, I get around 4 miles per gallon City 7 highway. I've unplugged the O2 sensors, new injectors, fuel pressure regulator, I put a good mass air flow sensor from another cruiser, it's getting spark to all cylinders but keeps fouling the plugs, Throwing code 26. Any help would be appreciated thank you

 

[NeverFinis]

Found this thread for you. There are many other threads here relating to your problem. Google Search these terms: "code 26 1994 fj80 code site:forum.ih8mud.com"

Since you didn't mention it, check all vacuum tubes and the air intake for cracks. Check that your EGR is working properly.

 

[bubfuji]

I have a 94 80 series with a 1fz-fe and it is just dumping fuel reeks of gas when running backfiring out of the exhaust, super slow, I get around 4 miles per gallon City 7 highway. I've unplugged the O2 sensors, new injectors, fuel pressure regulator, I put a good mass air flow sensor from another cruiser, it's getting spark to all cylinders but keeps fouling the plugs, Throwing code 26. Any help would be appreciated thank you

Did the code 26 just happen? Rig was fine yesterday / running rich today?
Please see the MUD Resources Tab. Find the emissions manual for the 1992 1fz. Use this manual to help check for vacuum/air leaks to supplement the FSM. The 1994 FSM is also part of the resources tab.
Without knowing more background. Incorrect injectors? Injectors stuck open?
Bad engine ground, Coolant temperature sensor, Air temperature senor. BVSV

 

[landtank]

might be an engine harness with an injector shorted to ground