Having problems with your 1999 Lincoln Navigator ?

98 Lincoln Navigator Check Eng light on

\015 Check Eng Light On, 5 codes.... Bank 1 & 2 too lean, Mass Air flow meter, both rear oxygen Senors. Idles rough, runs fine above 1500 rpm.\015\012Idles too high, 1500 then drops down to 500 and has a surge in its low idle, then rpm may climb to 1500. I changes both rear oxygen sensors, mass air flow meter, spark plugs as the engine has 117,000 miles and they were the originals. Still the same problems.Grrr....\015\012I will check the PVC hose and check for vacuum leaks. Any other ides?\015\012Has anyone else run into this similar problem before?\015\012Thanks\015 Posted / edited by AnonymousUser on : 13-07-2020

Answers :

Fuel pump is going out causing the truck to run lean and miss
Repair Help & Product Troubleshooting for 1999 Lincoln Navigator

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