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Old 03-24-2011, 12:43 AM
gshank21 gshank21 is offline
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Default 1994 Dodge Ram Shaking at low RPM

I have a 1994 Ram
160k miles

A few months ago i started having problems. When the truck warms up the engine shakes violently at low RPMs. I've changed the spark plugs, spark plug wires, distributor cap, rotor, fuel pump, EGR valve, cleaned the injectors, replaced the injector seals, and had the engine decarbonized. I also did a compression test. All cylinders were in range but cylinders 2 and 3 were on the low side of normal. Everything i did helped for abt 2 hrs and then back to normal rough idle and violent shaking at low RPMs while in dirive. After i changed the EGR valve tonight the problem stops immediately when the over drive is turned off. I'm thinking the problem might be a clogged catilitic converter or a faulty O2 sensor. Any advice would be appriciated.
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Old 03-24-2011, 08:27 AM
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A bad converter would cause even worse performance in higher RPM ranges. What were your compression numbers on each cylinder?
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Old 03-24-2011, 02:10 PM
gshank21 gshank21 is offline
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The PSI on all but cylinders 3 and 4 was 160. 3 and 4 were both abt 140. O2 sensors were also checked today and are working correctly.
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Old 03-29-2011, 12:22 PM
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Quote:
Originally Posted by RamTech View Post
A bad converter would cause even worse performance in higher RPM ranges. What were your compression numbers on each cylinder?
could the harmonic balancer be causing a shake? when it warms up and drops down to that certain rpm that makes it out of balance?

the 5.2's are externally balanced arent they? im not sure i remember
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