So I had a shop do my timing belt and water pump, and now I have a rough idle, when driving i feel it slightly lag then go often, when I rev it stutters at first, and also vibrates when I take off or rolling at 2-5 mph. Can anyone tell me what's going on?

 

Why have you not taken it back to the shop?

 

Oh it's going back on Monday and I'm raising some hell.
I just wanted some info so I could go in with knowledge .
Any ideas?

 

Did you look over your engine to see if anything is not connected ?

 

I could not find anything unplugged I checked all the plugs I could see and the plug wires so I think the timing is off. What do you think?

 

Or vaccume leak maybe?

 

My money is on timing. When I bought my 400 it ran like s***. It had a new timing belt but the half *** mechanic didn't set the timing correct. Had it adjusted and everything is great. Easy to tell. Pull the cam covers off and you will see a timing mark on each cam. Take a socket and breaker bar on the crank and turn the engine to top dead center. Your timing marks should be at 10 and 2 o'clock as you look from the front of the engine. May need to turn the engine crank over a second time to make sure you are on top dead center.

 

I will definitely check the marks. So did it have to be tore down to adjust it?

 

How dose one determine top dead center?

 

Just below and to the left of the crank pulley you will see a timing mark / gauge. It has tick marks and the numbers 1,2, 0. Turn the crank until the mark on the gauge is on "0". Then check your timing marks on the cams. If they are off I would make the guy who changed the belt fix it. Remember to crank it two twice to make sure you are truly at top dead center.

 

I appreciate all your help guys thank you. We will see how it goes tomorrow at the shop. And thanks again.

 

So the mechanic says my ignition coil is arcing on to the block. Would that cause the symptoms I'm having?

 

What can cause an ignition coil to arc