Don't forget a simple vacuum leak can cause hard start, also the idle air control valve! Get a can of spray Throttle body cleaner, start the car and spray around, pay attention to vacuum lines and manifold, if the idle changes, you found a leak. You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs!
Keep the spray away from the exhuast manifolds. Fire hazard.
Thursday, December 30th, 2010 AT 4:35 AM