Hey all,
long time lurker, first time poster.
I have a 1985 4Runner and have been having issues with it running a bit rough off and on for a bit now. I’m down here in Baja and don’t have a mechanic I trust and also appreciate doing as much as I can myself and enjoy learning, so trying my best to do as much as I can.
Shes running rich and giving feedback going downhill especially. Has lost some power recently, and the guy I bought it from in Colorado had put some Doug Thourley (sp) headers on it and changed the plugs, which I have changed back to OEM, but noticed today that there is one bolt missing from the new headers, so there’s that.
When I jump the diagnostic, I get 5 flashes, so defective O2 sensor, injector full rich or defective ECU from my research. I have changed the O2 sensor to no avail, and I’m trying to figure out the next logical move. I don’t know much about addressing the fuel injector and am assuming the ECU would be a plug and play switch from the existing if I am able to source one (which I think I can on eBay), but wanted to ask on here for a more knowledgeable opinion.
The loss of power and the engine “slapping” sound is concerning, but I did a block test and the fluid is as blue as it started, so that’s comforting I guess, but the loss of power is not.
Any advice is extremely appreciated.
Many thanks
long time lurker, first time poster.
I have a 1985 4Runner and have been having issues with it running a bit rough off and on for a bit now. I’m down here in Baja and don’t have a mechanic I trust and also appreciate doing as much as I can myself and enjoy learning, so trying my best to do as much as I can.
Shes running rich and giving feedback going downhill especially. Has lost some power recently, and the guy I bought it from in Colorado had put some Doug Thourley (sp) headers on it and changed the plugs, which I have changed back to OEM, but noticed today that there is one bolt missing from the new headers, so there’s that.
When I jump the diagnostic, I get 5 flashes, so defective O2 sensor, injector full rich or defective ECU from my research. I have changed the O2 sensor to no avail, and I’m trying to figure out the next logical move. I don’t know much about addressing the fuel injector and am assuming the ECU would be a plug and play switch from the existing if I am able to source one (which I think I can on eBay), but wanted to ask on here for a more knowledgeable opinion.
The loss of power and the engine “slapping” sound is concerning, but I did a block test and the fluid is as blue as it started, so that’s comforting I guess, but the loss of power is not.
Any advice is extremely appreciated.
Many thanks