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moparman01
New User
Feb 12, 2009, 8:16 AM
Post #1 of 3
(1202 views)
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88 Ram W100 erratic rpm.
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88 Dodge Ram W100, 5.2 TBI, 125,000miles.
I bought this truck a week ago. It has been in numerous shops before I bought it.
Problem is- The engine rpm is erractic (or lopes) between idle and full throttle. When full throttle it clears out and goes on. When driving, anything past 25% pedal bogs the engine down, but you can floor it, and it will go. Anything less than full throttle, it bogs again.
Sometimes it will idle without loping.
I guess this is a intermittent problem, because after replacing a 02 sensor and a map sensor, and dissconnecting the battery cable monday, I drove it two days with no problems. It was normal.
This is what has been done to the truck- new ecm, map, 02, fuel pump, tps, idle control module, temp sensor, vacuum check, fuel pressure check, I think the pickup in the distributor was replaced also, and I have even losened and moved the distributor back and forth with no change in loping.
I believe this is a normal cause on these trucks, because I have seen this problem on other forums with no fix.
Any information will be greatly appreciated!! Thanks in advance.
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Todd Norton
User
Feb 15, 2009, 5:05 PM
Post #2 of 3
(1191 views)
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Re: 88 Ram W100 erratic rpm.
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if your truck has an egr valve which im almost sure it does (located right rear of engine next to the distributor ) you may want to check it as they are quite problematic and can cause intermittant problems you may want to lightly tap it with a screw driver handle or temporarily disconnect and plug the vacuum source to it , the pressure transducers fail frequently hope this helps ...Todd
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way2old
Veteran
/ Moderator
Feb 15, 2009, 5:18 PM
Post #3 of 3
(1189 views)
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Re: 88 Ram W100 erratic rpm.
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Has the Idle stop solenoid been adjusted properly? If it is not properly adjusted, it will search for the idle and constantly extend and retract.
Being way2old is why I need help from younger minds
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