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1999 ram 2500 5.9 ltr turns over OK but misfires and will…

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1999 ram 2500 5.9 ltr...
1999 ram 2500 5.9 ltr turns over OK but misfires and will not start. Has 40psi fuel pressure. No water in gas. Replaced battery, plugs, plug cables, distributor cap, rotor, and plate, and substituted coil. OBD2 read has no codes except for incomplete O2 sensor test. Plugs are wet with gas and oil is diluted with gas from multiple starting attempts. Your ideas would be appreciated.
Submitted: 9 years ago.Category: Dodge
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Answered in 1 hour by:
3/14/2009
Dodge Mechanic: Dodgerench, ASE Certified Technician replied 9 years ago
Dodgerench
Dodgerench, ASE Certified Technician
Category: Dodge
Satisfied Customers: 3,423
Experience: 30+ years Dodge/Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist
Verified
HiCustomer welcome to Just Answer!.

It sounds the same to me... you've got everything you need to burn gas. Try this...

Pull the upstream oxygen sensor out to give the exhaust another place to come out. You may have a plugged cat.
Give the cat a THUMP with the side of your fist or a soft mallet to check for internall looseness. If you hear something rattling inside, it makes it more likely that you can't get air through the engine because exhaust won't leave.

Write back if you have questions or problems. I'll be glad to help.

Good luck!
Ed
Dodgerench
Dodgerench, ASE Certified Technician
Category: Dodge
Satisfied Customers: 3,423
Experience: 30+ years Dodge/Chrysler exp., ASE Master with L1 certification. Driveability/ combustion specialist
Verified
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Dodgerench
Dodgerench
Dodgerench, ASE Certified Technician
Category: Dodge
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