Rough Running after Timing Belt Install

[psychos2]

there is a tsb for replacing the timing belt.i do not remember what it said.does anyone know? when the marks are all lined up there is no way it could be out 180 degrees. my guess would be that it is off a tooth. shawn

[Raque Thomas]

Been watching this thread with great interest, as I'm seeing some small cracks in my belt - think I'll take it and have it done, though!! Hard to believe that something as precise as timing would be described in the manual as "line up the mark to the 2 o'clock position". Sounds like a 1950's era vehicle rather than a 1999-2001! Seems this would be further compunded by having to line up 4 marks to such subjective points in space - unless the computer compaensates and adjusts the timing??

[Joe_Black]

This just in from another race mechanic I had forwarded this thread to (unedited, so don't take the wording personal Kyle! ):

Hey Joe, just read the VX board thingie. Definitely the #1 and #3 bank is out of time on the intake cam, that is why the engine is running rich, the injector fires, the fuel pools up behind the valve because it isnt opening at the right time, and then it dumps a load of fuel into the chamber, rather than a fine mist. I don't know why the marks would line up, but he turned the cams around with the belt off--HUGE mistake, may not get it fixed on his own! All those things have to have the belt to keep time, that is why it's there. If everything lines up, it's a little confusing, cause it should work, but it definitely sounds like an intake cam is "bonked". Also, maybe he mixed up the plug wires or rather the coil plugs and is running the #1 with the # 3 connector, that would be easy! It's definitely not an ECU problem, that would never be that bad.

The coil comment is good 'cause it's one of those "simple" things that can slip under the radar while you're pulling your remaining hairs out.

[kpaske]

Raque - I think you are thinking about the Serpentine belt - the timing belt is not visible without some significant disassembly. That job actually isn't that hard; some have said it's a five minute job, no tools required. It took me about an hour, including replacement of the tensioner.

Joe - Thanks for getting your friend's advice. I'm not sure how turning the cams is such a huge mistake, when both of the manuals state that this is the correct procedure, and it is still my understanding that if everything lines up, they can't be rotated 180 degrees. His idea about the coils being switched is a good thought, but the only one I disconnected was the #2, so there is no possibility of a mix up there.

What about if I got a defective tensioner? That could cause these type of symptoms, couldn't it? Thinking back, when I did the job the second time after recompressing the tensioner, the belt didn't seem to be as tight as I expected. Maybe it's either too loose, or even skipping a tooth?