MISSING PUT NEW PLUGS IN STILL HAVE MISS I CAN REMOVE ONE WIRE AT A TIME 2WIRE NOT FIREING

if your saying it overheats is compression entering the water jacket listen at radiator cap or bubbles in overflow jug (Head gasket leaking ) if you are saying it misses check the spark plugs is pull wire to plugs one at a time when you get to the one missing it will make no change in vibration(miss) the one working will miss more when removed and running first loosen the wires so you can take them off with a wood cloths pin so you dont get shocked when you determine the missing one replace with good plug like auto lite (cheap) try see if miss gone if not plug could be plug wire stop beating your motor

Go to auto parts stor give them ur year make of car and model ask for plugs then see what size socket ur r going to need u will need a3/8 ratchet a exactions and proper size socket .remove sparkplug wire one at a time . What I mean is 1sparkplug wire remove old plug install new one replace wire on plug then move on to next one. If u pull all off with out marking them u will be in a world of hurt. It has a fireing order one plug at a time don't forget the gap the guys at the auto parts stor can help with that

From the timing belt to the transmission the fireing orders are 1234 One and three fired the same time 2 and 4 fire the same time. Pull all the plugs for the spark plug on them and lay them across the top of the motor with plugs in them you can see which ones fire at what time. The spark plugs need to be touching a grounded part of the engine to fire. This also will help you find out if you have bad wires.

battery losing charge or a little more serious your alternator is about to pack up simple test charge your car battery and try again alternator thats a job for a mechanic or it could be a dirty carburettor is it ticking over or just miss fireing if its miss fireing its your carb if its not ticking on key turn its your alternator and quite possibly your battery to

Did you check the ignition timing ? It should be for manual transmission 20+/- 2 deg BTDC

automatic transmission 20+/- deg BTDC

FYI---One time i dropped a new plug before i put it in and did not realize that the gap have closed up and started a bad miss..make sure all plugs are gaped correctly....could be something else but you can start here...Hope this helped ?

catalytic converter is plugged

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Your amp as nothing to do with your car runnig bad. Your engine has a problem. It's miss fireing may be do to bad coil or even spark plugs or spark wires

On my 2002 safari I had a inter miss fire. After double checking all electrical. I had a bad injector of all things that was bad. My not be ur case but I thought I would mention it

You can have car put on scope and it wll show any irregularities in the ignition system. It can also be dowithout any equipment. First, loosing ALL 8 spark plug wires, Now place the spark plug wires loosly back on, just secure enough to secure. You might need 2 people. Being the miss is more consistant in gear, APPLY THE EMERGENCY BRAKE , put trans into drive and raise rpm's till miss is obvious. Remove ONE plug wire at a time, TILL THERE IS NO DIFFERENCE IN MISS. Thats the cylinder missing. Start with the spark plug, inspect, work back to wires and cap. An EXTREME result will be NO COMPRESSION.