i have a 93 maxima i am haveing some real issues with it. first off it has 150,000 on engine. 10,000 miles ago i was tuning it up and noticed a few cracked coil packs, have since then replaced all coil packs and new ignition module the still is running the same very poorly, had a new water pump put on since then. still runs same.. no power bad accelration very hard starting in snow have to 2 foot cr to keep running at times. cant get the check engine light to come on never seen it on.. 1 is how do i check the engine code maybe light is cut bought car used. 2 does anyone have any idea it could be.. maybe a bad timing belt etc.. pleace help love this car wanna fix and keep.. thanks in advance

 

sorry that is a 93 maxima i check codes today and none available is this startig to sound lie a engine problem maybe a blown head gasket car dont smoke dont burn oil or use coolant