Hello everyone, got another CEL diagnostic problem with a 89 4runner 22re efi. It is popping up the 25/26 codes, lean and rich. I have read numerous posting on the internet about it and am still kind of stuck. Any help would be greatly appreciated. I have tested:
MAF - Resistance readings in spec
TPS- Resistance readings in spec
O2 sensor - reading .7 at idle and .9 at 2500 rpm
Compression test all 90psi except for #3 which is 120psi
Air leaks - found a few, vacuum lines and manifold but still threw codes
Cold start valve
EGR- went to smog and this failed, (EGR Functional test) But I fixed it and it is operational - had a clogged port
Air Flapper valve works
Has great spark to all plugs
Replaced cap/rotor/plugs/wires
New alternator, battery
Might be losing a bit of coolant
Burns around 1/2 quart per 2000 miles maybe
Leaks Coolant out from somewhere near the starter.
Smog test1: rpm 809, CO2%=13.3, O2%=2.3, HC=187, CO%=.01 - Fail - Max HC=120
Smog test2: rpm 2649, CO2%=12.9, O2%=2.9, HC=370!, CO%=.01 - Gross Polluter - Max HC=180
I have not tested/checked:
Fuel Pressure
Fuel Filter
Leakdown test
and a lot more
Any thoughts? Might be head gasket? Valves? Rings? Just bought it from a guy who said the head was "done". I need some frickin oil to pour into cylinder to see if it is the rings, can't believe I don't have any. Thanks for any input!
MAF - Resistance readings in spec
TPS- Resistance readings in spec
O2 sensor - reading .7 at idle and .9 at 2500 rpm
Compression test all 90psi except for #3 which is 120psi
Air leaks - found a few, vacuum lines and manifold but still threw codes
Cold start valve
EGR- went to smog and this failed, (EGR Functional test) But I fixed it and it is operational - had a clogged port
Air Flapper valve works
Has great spark to all plugs
Replaced cap/rotor/plugs/wires
New alternator, battery
Might be losing a bit of coolant
Burns around 1/2 quart per 2000 miles maybe
Leaks Coolant out from somewhere near the starter.
Smog test1: rpm 809, CO2%=13.3, O2%=2.3, HC=187, CO%=.01 - Fail - Max HC=120
Smog test2: rpm 2649, CO2%=12.9, O2%=2.9, HC=370!, CO%=.01 - Gross Polluter - Max HC=180
I have not tested/checked:
Fuel Pressure
Fuel Filter
Leakdown test
and a lot more
Any thoughts? Might be head gasket? Valves? Rings? Just bought it from a guy who said the head was "done". I need some frickin oil to pour into cylinder to see if it is the rings, can't believe I don't have any. Thanks for any input!