Hmm, a low idle could be one of so many things at this point. You sound like you've done a fairly thorough job of cleaning and replacing various bits that would have an impact on your idle. Without knowing the year of this FZJ do you have access to a OBD II scanner?
I'm wondering if maybe your TPS is slightly off calibration or your MAF is dirty/old, if you've got the cracked intake hose, or some other difficult to pinpoint problem with your A/F mixture.
I'm wondering if maybe your TPS is slightly off calibration or your MAF is dirty/old, if you've got the cracked intake hose, or some other difficult to pinpoint problem with your A/F mixture.