2002 Other Dodge Models Van bucks on freeway

MFUTRAL

MEMBER
2002 DODGE
V8
2WD
AUTOMATIC
110,000 MILES

We had a new transmission put in our Ram Wagon 2500 a few months ago. (5.2 liter 318). Since then the van bucks and hesitates on the freeway and occasionaly on surface roads. Almost sounds llike engine is backfiring. We have had plugs, wires, etc already replaced. Our mechanic has out the computer on it and it's not showing any codes. They can't get the pproblem to duplicate when they drive it of course and can't figure out what the problem is. Help!

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Hi, does the check engine light come on while you drive?

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Thursday, November 13th, 2008 AT 8:08 PM

MFUTRAL

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2 POSTS

No, the check engine light has not come on at all.

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Friday, November 14th, 2008 AT 9:08 PM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

Hi, there are only to reasons an engine will buck, lack of fuel or lack of spark. We need to test both systems to detreman which system is failing. please follow these links for the testing poceedure.

https://www.2carpros.com/how_to/how_to_test_an_ignition_system.htm

and

https://www.2carpros.com/dia/test_fuel_pressure.htm

test up the test with both the fuel and ignition, monitor both while you drive, when the engine bucks look for the failing system. Also dont worry about the engine misfiring when you are doing the ignition test. You will still notice the system failure. please let me know how it goes.

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Sunday, November 16th, 2008 AT 7:23 PM