My car having misfire 302 so for miles i decided replace all spark and ignition coils, it was low coolant not overhesting refill i chechk compression 2 cyl 120 and 2 over 150, reset all codes working great, well week later suddenly stall again light back showing 302code again, but if kick gas run good light still on any ideas...

 

Engine type 4-cyl or V-6?

The engine stalled or stall?

Is the coolant system losing coolant?

 

 

The problem could be something other then ignition such as:

-Wiring problems (did the engine get wet)
-Vacuum hose leaks (check)
-Injectors (rare)
-Low fuel pressure (failing pump or clogged filter)
-Mass Air Flow sensor (try cleaning)
-Engine Coolant Temperature (ECT) sensor (common)
-Compression (rare)
-Valve clearance (rare)
-Valve timing (rare)
-PCV valve/hose (check)
-Air induction system (check for cracks/splits in plastic pipe)
-ECM (rare)