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02 1500 5.9 Running BAD

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Old 04-23-2013, 06:21 PM
iskifast iskifast is offline
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Default 02 1500 5.9 Running BAD

Got a 02 sport 5.9 and I have replaced cap rotor, plugs and wires, TBS, and checked the fuel presser which was good. After doing all this it still runs like crap. starts up fine and idles fine. when driving it sputters allot. Hooked it up to a computer and everything was fine... even both O2 sensors. ??? What next ??
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Old 04-23-2013, 07:25 PM
dodge dude94 dodge dude94 is offline
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How is your plenum, cat and what brand are your 02 sensors?
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Old 04-24-2013, 09:47 AM
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not sure about plenum?.... is there a way to tell if its actually the problem ? the o2's are stock as far as I know... cat... havent checked it... but never noticed any leaks ..
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Old 04-24-2013, 11:26 AM
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How many miles on your truck? If you have no CEL's then I would suspect the plenum (thus a clogged cat). Look down the throttle body and see if there is any oil pooling up.
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Old 04-24-2013, 11:49 AM
Izero Izero is offline
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Could be a clogged cat, but I'd lean more towards a bad O2 sensor somewhere... he might have a check engine light that isn't staying after the sputter...
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Old 04-24-2013, 02:23 PM
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figured out I had a bad injector .. tested the oms and it was only reading 3.3 and the rest were over 12 .. at least I hope thats what the problem is.....
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Old 04-24-2013, 02:24 PM
dodge dude94 dodge dude94 is offline
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Hopefully you've fixed it.

Go into the 2nd gen Ram section and read the End All Be All Plenum Thread.
That will tell you all you never knew you needed to know about the Dodge plenum problems.
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Old 04-25-2013, 01:50 PM
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OK!! so it wasnt the fuel injector ... although i did have one that was bad... fixing it didnt help.... its almost worse .... wont tack over 2000 now. when I had it on a computer the O2 sensors read fine... I did the sea smoke thing and no smoke came out at all .... And from why this hole thing started from in the firs place replacing the plenum doesnt seem likely ..... next i guess is the cat..
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Old 04-25-2013, 01:51 PM
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o yeah .. it just turned over 200K !!
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Old 04-25-2013, 02:00 PM
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Or fuel pump...
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Old 04-25-2013, 02:15 PM
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Does the 5.9 have an IAC? Might be faulty as well.
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Old 04-25-2013, 07:06 PM
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My bet is plenum. You can check this by removing the breather, opening the throttle plate and peering down with a flashlight. Any signs of oil and the plenum gasket is hosed. Common issue. Recommended fix - Hughes plenum kit and you'll never have the problem again...
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Old 04-25-2013, 07:22 PM
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Quote:
Originally Posted by Prismatic View Post
Does the 5.9 have an IAC? Might be faulty as well.
Yes it does
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Old 04-25-2013, 07:26 PM
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Quote:
Originally Posted by iskifast View Post
OK!! so it wasnt the fuel injector ... although i did have one that was bad... fixing it didnt help.... its almost worse .... wont tack over 2000 now. when I had it on a computer the O2 sensors read fine... I did the sea smoke thing and no smoke came out at all .... And from why this hole thing started from in the firs place replacing the plenum doesnt seem likely ..... next i guess is the cat..
Won't go over 2000 rpm?

Clogged cat. But replace your plenum with the ebay aluminum plenum plate.
Then get you a new cat and NTK 02 sensors, that, in theory, should fix your problem.
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Old 05-03-2013, 03:06 PM
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so it wasnt the cat.... replaced the O2 sensor ofter the cat... no change... now its throwing codes P 0031 and 37 also P1296 ... And I've already changed the TBS. again when I put it on the computer last time it said my O2's were fine... and I've already tried resetting the PCM .... I'm pretty sure my plume in ok .. didnt look that bad from the top end..... I no its something stupid .... ???
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Old 05-03-2013, 03:09 PM
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I think it is time to let the dealer look at it... throwing parts at it isn't getting you anywhere.... :-/
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Old 05-03-2013, 03:25 PM
dodge dude94 dodge dude94 is offline
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P0031 means:HO2S heater control circuit low (Bank 1 Sensor 1)
I couldn't find 37...but it also has to do with the 02 sensor heater.

P1296- No 5 volts to MAP Sensor Loss of a 5 volt feed to the MAP sensor has been detected.


And the 02 after the cat doesn't really **** off the PCM unless it just fails. It's the pre-cat 02 that is messed up. If you haven't already, replace that guy with a Denso or NTK.
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Old 05-03-2013, 03:29 PM
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NGK*

Replace the Upstream O2 Sensors, and also might as well replace the MAP sensor too...

If that all doesn't work then you've got something crazy going on!
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Old 05-03-2013, 04:15 PM
dodge dude94 dodge dude94 is offline
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No, not NGK, NTK.
They're made BY NGK.
Same thing.
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Old 05-03-2013, 05:06 PM
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Thank you all for all your help..... will deff let ya no what happens .....
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Old 05-03-2013, 05:06 PM
 
 
 
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