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I have a 99 Cherokee Sport, w/straight 6. Runs like a champ when driving but starting it usually takes 2 tries to get it to start. If you start it within 5 minutes of shutting off it will sometimes start first try though. Also rough idle for a minute or so after getting started. Also notice that when I run shell premium sometimes it will start first try especially when fuel tank is full. Plugs are good (Bosch Plat. +4) any other ideas? Thanks! Leann
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test the compression, also look for a intake manafold leak, take a can of carb cleaner and spray around were the intake mounts to the cylinder head if the engine smouth out replace the gasket or the injector o-rings.....we do a lot of valve jobs on these engines so do a compression test if below 100 psi remove the head and replace the valves and most likly the valve seats....good luck
The request doesn't say what the problem is...takes extra time to start?
Sounds like fuel-related - injectors/fuel pump/fuel filter? Is there a strong fuel smell or black exhaust for a few seconds/minutes after starting it when it's sat overnight? If so, then you've got a leak causing excessive fuel...kind like 'flooding' the engine on old cars w/Carbs.
It could also be the temp. sensor. If it thinks the car is 'warm' it won't give the car enought fuel to start when cold.
What your are describing for symptons actually sounds like a sensor and a valve the starting problem is aa sensor Throttle position sensor and the stalling problem is your idle air control valve hope this info helps just make sure after you replace these 2 items that you disconnect the battery for about 10 minutes so the computer resets itself.
i have 98 sport-has similar problem occassionally-not that often-may be moister in connections or computer-restart to be safe until lights register then check off
remove the cluster clean contacts with dielectric spray then apply dielectric grease to connectors and reinstall if this doesnt help you need a cluster
Did you try changing the air breather for the motor?You need three things inorder for the engine to run well. Air,fuel,and spark.since you had a tune up and fuel flushed.I can only think of two things.First I never heard of flushing a fuel filter,you change it ( not flush it ) change your fuel filter,eliminate the guess work.And change your breather.
Seems to be a chronic problem with crank position sensors... On yours it is tested between b&c terminals and should have no continuity there. (should show an open circuit if good)
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