I just bought a 88 toyota 4runner.. I put the timing gun on it to see where it sits (because it smells like its running rich) and it was about 2-3 inches away from the mark im thinking advanced.. It runs good but im not sure if the timing is advanced for sure.. I was reading somewhere its possible to be a few things that really add up if you just trouble shooting some guesses.. Such as MAF sensor, O2 sensor, egr, fuel injectors, and or a clogged intake? I dont know much about toyota's and this is my first EFI. Any help would be great.. I am in tacoma and if anybody that really knows there CHIT has time this weekend ill come to you.. :kissmyass: