[freez]

i have a 76 280z.well the other day the car start to miss and sputed a little bit.so i pulled the plugs out and the the three back plugs where black and the and the three front where ok.what could make it do this.thanks ahead of time for any help.freez

 

[shane280z]

Hi Freez.
Go to 'Search' Click ' Author Only' and type ' shane280z' scroll down to a post dated oct28 to a Mr Bondorocket. This post will aid you in (1) explaining how to adjust your valves and (2) what next to be looking for when mpg are low and even a rich running condition exists. BTW, you need to adjust the valves reguardless as a basic starting point to isolate just what is the real problem behind your running 'rich' . Have fun. shane-