I've read thoroughly many different posts related to the issues I'm having. However I cannot figure out what the issue is.. if anyone can help I'd appreciate it.
have a 1991 fj80 4.0
it has had intermittent starting issues mostly in the morning. The CEL does not come on at the key turn
when the vehicle is not starting and the CEL is not present at the start, then the codes cannot be read by jumping at diagnostic box
when the vehicle is working properly the codes read 21 and 28.. upon inspection the o2 sensor has a wire pulled loose
i've replaced the EFI relay the first time the vehicle didn't start and it worked.
is there a chance the o2 sensor is causing the CEL to not come on at the start?
is it most likely a short?
i'm not the most compitant with electric but i can probably figure it out if someone is willing to help.
super bummed about the truch being down, i'd like to feel more confident on the trail with it.
have a 1991 fj80 4.0
it has had intermittent starting issues mostly in the morning. The CEL does not come on at the key turn
when the vehicle is not starting and the CEL is not present at the start, then the codes cannot be read by jumping at diagnostic box
when the vehicle is working properly the codes read 21 and 28.. upon inspection the o2 sensor has a wire pulled loose
i've replaced the EFI relay the first time the vehicle didn't start and it worked.
is there a chance the o2 sensor is causing the CEL to not come on at the start?
is it most likely a short?
i'm not the most compitant with electric but i can probably figure it out if someone is willing to help.
super bummed about the truch being down, i'd like to feel more confident on the trail with it.