Getting Mutliple misfire codes and number 3 cylinder misfire code. Ok I have replaced the cam sensor, all 4 fuel injectors,plugs, wires and the coil. Still idles very rough and of course all the misfire codes. You guys have any ideas on what I should do next? If the timing was off by a tooth could it cause a random misfire code and could a vaccum leak cause this also

 

Yes timing being off can cause this, and yes a vacuum leak can also cause this. I would start by checking compression, then fuel pressure. Is there any reason you think the timing could be off? Or a vacuum leak?

 

I had the timing chain replaced last year but I dont know if he replaced the tensioner or not.The car drives just fine as long as im above about 1200 rpm but runs like crap at idle.I had found that they improperly torqued the valve cover gasket by sprying starter fluid on it but it also could be the exhaust manifold gasket is leaking also.

 

The exhaust manifold gasket is more then likely your issue. Its making your o2 sensor go crazy. The o2 sensor measure the amount of fuel in the air in the exhaust. When you create a leak before or at the o2 it will cause the sensor to not read correctly, this will make the car run lean and idle rough. Can you explain to me how the starter fluid on valve cover showed you it was leaking? Do you mean the car was running and when you sprayed it the idle would change? Because if that is true I would assume the intake manifold and/or injector seals were leaking not the valve cover gasket, which also can cause these issues (this is a vacuum leak).

 

I though the same thing but I sprayed the intake side of the valve cover gasket and the injectors and nothing happened.

 

I'm going to check the compression today hopefully all is good, Really can't afford to replace the head if I have a bent valve

 

Check compression. All 4 cylinders check out good and so does the Fuel pressure. I'm stumped people

 

Cat plugged? Injectors plugged? TPS and map reading correctly? Any check engine lights besides the misfire?

 

Did you ever fix the exhaust leak?

 

No I had a pro run another compression check for me. Found a bent valve or burnt valve in #2 cylinder. ****! I cant afford a valve job at this time