no power 1997 ram van 5.2 auto
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Joined: Jun 2012
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You have a lot more going on than a misfire in cyl 3. Even if 3 were not firing at all it would not account for the lack of power as you have described it. There would also be a lot of shaking and odd sounding idle going on. I have a Ram Van with a 5.2 and misses in 1-3-5. The truck will run 100mph, gets 18mpg on the highway and the engine still sounds pretty normal at all rpm's. I often pull a 3 horse trailer with a couple of 1000# + horses in it, pulls it with no problem, and that with an engine that has so many codes in might be confused with an Enigma machine. 
Last edited by jimbo111@yahoo.com; Jul 14, 2012 at 09:41 AM.
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Amateur
Joined: Oct 2010
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From: ct.
no pwer 5.2
hello again changed the ignition wires [no change] =====then i removed the first 02 sensor and disconnected it ===then tied my van to a tree/ rear tires on hot pavement and couldnt spin the tires=== obviously didnt need to hook up the boat! bob
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Joined: May 2008
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From: North TX
Might try disconnecting the battery and the PCM connectors and cleaning them then reattaching and see if that clears up the problem.
If you have not changed the crank sensor then it may be bad. Unfortunitly there is no way for the computer to tell you when it going bad/out.
If you have not changed the crank sensor then it may be bad. Unfortunitly there is no way for the computer to tell you when it going bad/out.
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Amateur
Joined: Oct 2010
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From: ct.
i think it ran a little bit better ==but w/ all new parts installed it runs great going down the road [hardly have to step on the gas pedal to maintain speed]
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Amateur
Joined: Oct 2010
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From: ct.
might try disconnecting the battery and the pcm connectors and cleaning them then reattaching and see if that clears up the problem.
If you have not changed the crank sensor then it may be bad. Unfortunitly there is no way for the computer to tell you when it going bad/out.
If you have not changed the crank sensor then it may be bad. Unfortunitly there is no way for the computer to tell you when it going bad/out.
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Joined: Mar 2012
Posts: 933
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From: South Kentucky
Sounds like a fuel/air mixture issue to me. Starts fine, idles fine, and runs ok lightly loaded but does not make adequate power when you open the throttle.
With the odometer showing 85k miles it is either inaccurate or the truck sat for a long time. The lines and injectors may be gummed up.
You have already dropped the gas tank and replaced the fuel pump assembly. At this point I'd check the fuel line pressure, preferably under load. If that is difficult, you may be able to simulate it by holding the truck with the brake while you open the throttle and load the engine while watching the pressure guage. Don't do this for more than 20 or 30 seconds because it is hard on the torque convertor. If the pressure is low its the pump. If pressure is good then the lines/injectors are probably clogged.
With the odometer showing 85k miles it is either inaccurate or the truck sat for a long time. The lines and injectors may be gummed up.
You have already dropped the gas tank and replaced the fuel pump assembly. At this point I'd check the fuel line pressure, preferably under load. If that is difficult, you may be able to simulate it by holding the truck with the brake while you open the throttle and load the engine while watching the pressure guage. Don't do this for more than 20 or 30 seconds because it is hard on the torque convertor. If the pressure is low its the pump. If pressure is good then the lines/injectors are probably clogged.