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1998 Lincoln Navigator Question: My Lincoln Navigator (1998)still has a terrible miss in it HELP!!!

 

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tnmomof3, Greeneville, TN, July 21, 2012, 20:19
 Rookie

My Navigator still has a miss even after it has been checked out, here's what we've tried so far:
1. New spark Plugs
2. New Fuel Filter
3. Cleaned Mass Air Sensor
4. Checked Injectors
5. Getting 100lbs. of pressure to Cylinders
6. Fuel is getting 30lbs. of pressure
7. Checked Hoses underneath

My husband and his nephew have checked almost everything on this vehicle, they said that they checked it for a vaccuum leak too. One of the guys helping them builds his own Mustangs, so he knows a lot about cars, and they said that they don't know what to do next. I have three kids and this is the only vehicle I have, and we have spent so much money already, we don't really know what to do!!! Please does someone have any ideas that we haven't tried? Could it be the fuel pump? Transmission? It doesn't seem to be slipping or anything, and my husband said its clean and the car was driving pretty good, but now when you go uphill, it will barely go at all. thanks....

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