if you have installed a new chain indicates that the sprocket teeth on the cam and crank are badly worn and that is altering the pitch between the chain rollers and the teeth
IT is not a common problem if the chain and sprockets are repalced together
make sure that the wear guides are against on the chain and the chain tensioner is operational
snap rings hold these shafts in so they simply pry out. the ring is round and attached to the shaft which stays firmly in place when the shaft is removed
Have it scanned to see what the check engine code is. when the light comes on at speeds 45 and up is because it is sending unburnt fuel through the catylitic converter which can cause damage to the converter. have it scanned either at a repair shop or a parts store. the only problems at the parts store is that they can tell you what the code is but not how to fix it. they will just recommend parts to buy and try to fix it then after you buy a bunch of parts and still have the same problem only to end up at a repair shop that can properly diagnose and repair the problem but you already spent about three or five hundred dollars on parts you didnt really need.
Well, every car manufacturer sets the appropriate amount of oil it requires for the car it manufactures; it should specify in your owner's manual. Pretty much universally, the easiest way to check if you have enough oil is to pull out the oil dipstick found in a slot near your engine underneath the hood. For a great step-by-step guide, and so that I'm not repetitive, review this link on your issue: http://yourhandymanzone.com/Your_Handyman_Zone_How_To_Pages_Vehicle_Car_Zone_Cars_Trucks_Vans_Oil_Check_Motor_Oil.htm
generally when the light comes on in this fashion it indicates low oil. when you check the oil ... put the dipstick in one way... pull it out .. check the level... then turn the blade of the dipstick around so the other side is facing you... reinsert it into the hole and check it again... make sure the dipstick is completely seated in the pipe. i'm not sure i've ever heard of it but the baffle inside the oil pan may have broken (this prevents the oil sloshing front or back when you brake)
Water pump is a bit tired and not flowing as much to handle the higher work load. Give the radiator a good flush first and see what comes out. Might come good if you flush the donk as well.