question on exhaust and miss

[bigman22556]

ok i just ran a full 2.5" exhaust on my pro. and back by the right rear tire how did you all keep your exhaust away from the brake line. and now for the miss today i was driveing and under acceleration it started missing but at about 70mph it stops it wouldn't do it at idle then i checked my plugs and reset the gap then after about 20min of driveing it started missing at idle and i know the timing is too far advanced do to the plugs and it idles high but what could be the problem


btw i have a sohc 1.8 if it matters

[bigman22556]

2 months ago

[emp94mazda]

no its not injectors or fuel filter, check your coil or wires.

[D323]

when you advanced the timing did you use a jumper beteen pin #10 and GND? If not your base timing could be off, making your advancement too far in the ditsy.

[bigman22556]

hey just wanted to let you know i put a new fuel filter on it new spark plugs new wires and adjusted the timeing and cleaned the injectors by hand new plus gas and the miss is gone except at high rpms and cold start up now what is it oh and the fuel filter looked factory and thats scarry