Accent broking timing belt now misfire 1&4 - 2001 Hyundai Accent

I certainly hope you meant crankshaft and not camshaft. As far as the pistons are concerned on most 4 cylinder engines if 1 & 4 are up then 2 & 3 are down. If you don't have the crank positioned with all four pistons at mid-stroke, then chances are if you rotate the camshaft you will break or bend valves since this engine is an interference engine.

You can if you don't have a serpentine belt/ 1 belt. But more than likely it does.

119psi is perfect

that particular vehicle has a distributor-less ignition system. completely stand alone and electronic. change around the known good coils and see if the misfires on the computer change. see, what the trouble codes say is your numbers 1 thru 4 cylinders are misfiring inadvertently. if you move the coils around, which there are 4..one to 2 cylinders and if its 4 bad coils giving problems then the codes will move around. it could be the crankshaft tone wheel or the PCM as well. take it to a good diagnostic facility like a hyundai facility if you want it fixed right the first time. the hyundai parts are a little more expensive but they are the BEST part for your car, OEM parts are the way to go and the mechanic has probably seen this before and can tell you whats wrong before you leave easily.

Did you line up the timing marks when you installed the new belt?

Misfire condition can cause by few items.

1) mis-gap / worn / damaged plug.
One Hyundia and small displacement engine,it can also be loose plug.

2) oil leak / vapor covering the cermaic portion of the plug.

3) clogged air flter. // change interval for small car is 12,000 to 18,000 miles.

4) clogged PCV on // 140,000 or higher mile vehicle

5) worn valve cyclinder // 160,000 miles +

6) worn timing belt with an old water pump //// 140,000 miles+


Please reply with the currrent odomenter reading and recent repair record.

The belt is adjusted by the position of the alternator. Loosen the bottom mounting bolts. Loosen the adjusting bolt in the top bracket & using a suitable lever, pry the alternator outwards until the belt is tight. Do not tighten it too tight. you should be able to deflect the belt down about 3/4 -1" when tightened. Hold the bar to maintain this tension on the belt and tighten the top adjusting bolt. Re-tighten the two bottom bolts. Check the deflection of the belt once more to ensure it is not to tight.

Please replace all the Spark plugs on this car.

Hyundai recommends changing the timing belt every 60K miles. As far as symptoms go, a timing belt won't give a lot of warming prior to breaking but a few would be extremely rough idling and misfiring. You should know that a broken timing belt often will do damage to the engine. I hope you find this answers your question. All the best!
Greg

DID THE BELT BREAK AND THEN IT WAS CHANGED. If so then you may have bent valve. IF NOT then vehicle may be timed wrong. Here is a diagram of your timing marks, http://www.2carpros.com/car_repair_information/tec_info/2002/hyundai/accent/2002_hyundai_accent_timing_belt_diagram_marks.htm contact if you need more help. Thanks for using FIX YA