I recently had my timing belt replaced, along with other parts ~ however now it appears to be shuddering when I stop at lights, etc. The rpm at idle is 700, but revs up and flucuates. Could it be the timing belt wasn't installed correctly? the mechanic is trying to tell me the problem was 'fixed' by them replacing the duct air tube / the air intake tube and hoses. So, I'm not an expert, however that seems 'fishy' to me. Any assistance would be appreciated!
How was it running before the work was done? A vacuum line in the wrong place could be holding the EGR valve open. Try unplugging the vacuum line from the EGR valve to see if it idles different. Plug the vacuum line with a small bolt or golf tee
SOURCE: 1998 Nissan Pathfinder timing belt replacment
go to autozone.com - they have online repair guides for most vehicles and I must say they are great.
SOURCE: Wiper Linkage
if you live near montreal you got yasmine auto at laval they got mostly part of qx4 but it fit for pathfinder if they dont got it usely they can tell you where
SOURCE: replacing timing belt on 1997 Nissan Pathfinder
Here's a link with all the info
I would appreciate a FixYa rating .. thanks .. Crayz
SOURCE: 1997 nissan pathfinder timing off.
The cam sprockets should have marks on them (dimples) that should align with marks on the rear timing cover. There should also be a similar dimple on the crankshaft timing sprocket. These will align with their respective marks when the engine is at TDC. The alignment marks are in the following locations as you look at the front of the engine: RH cam sprocket at approximately 11:00, LH cam sprocket at approx 1:00, Crankshaft timing sprocket at approx 4:00 or 5:00. IF you can't find the marks on the cover, put the marks on the sprockets in those approximate positions and set the belt by using a belt tooth count between the marks. Cam to cam should be 40 teeth between the cam marks. Between the LH sprocket and the crank mark should be 43 teeth. You can check TDC by removing your number 1 cylinder spark plug and carefully inserting a long screwdriver and watching the rise/fall as you hand crank the crankshaft into position (which is much easier with the plugs out)
SOURCE: idel issue after air intake install
Your problem sounds like have air leakage from air induction system. I suggest you to re-check the gasket of Air Intake Manifold you installled or vacuum hoses for possible air leaking.
The easy way to check it, use Throttle Body or Carburator Spray Cleaner. Just spray around intake manifold where gaskets fitted and observe the idle speed, once the idle change or encrease, definetly there is air leak and you have check the gasket or replce it if necessary.
But if doesn't make change, I suggest you to check Idle Air Control Valve, check connector plug, lines and if you have donor unit try to do test part.
I hope you fix your problem and please update me whatever the result if you dont mind. Thanks
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