ok guys,been a while since i have been on here but have a question....after i start my 2000 dodge ram 4x4 360 up after about a minute orso it starts to spit and sputter then runs ok and if i turn it off for twenty minutes or so and start it back up it does the same thing and it has that nasty smell too or maybe i just realized it....but anyway it only does it right after i start it up so far anyway...any ideas???

 

cat colgging if smell like stinky eggs, rough idle then clears when driving, fuel fillter, should check fuel psi at idle...other bad smell could be a squirrel in the tailpipe

 

+1 on clogging cat. And most likely bad o2's also. And we all know the reason that happens.

 

It's oxygen sensor season. Replace yours. NTK or Denso brands only.

To prove it out: At the point that it begins to spit and sputter, rev the engine to about 1500RPM and hold it there for 30 seconds or so. That will warn the upstream oxygen sensor with exhaust gas. Let up on the throttle and it should idle nicely again. If that happens, replace the sensor and drive happy.

 

For giggles and grins, check the plenum also...cause it jacks the O2 sensor, cat.....need I say more?

 

Nope, you sure don't.

 

All you guys crack me up, thank you for that & keep the jokes a flyin

 

Ok well i checked my plenum and no oil pooling if thats what you mean by checking it...and will try giving it gas for 30 seconds after it starts to idle rough and see if thats it tomorrow and i have no codes...will check gas pressure on fuel rail too and is my fuel filter in my tank or not???

 

yes it's part of thr pump set up on top of the tank..yeah check inside the IM, best to do with the throttle body off to get the best view..

 

ok well i tried a few things on my truck...no codes not even on a scanner while driving...fuel pressure ok...cleaned throttle body and my mechanic said he tried that motor that is in the iac i think he said but that wasnt it...he said he did look down throttle body and noticed a little oil down there but not a lot...he thinks its the plenum gasket...he says he thinks its acting up when its first started up and after it warms up the plenum gasket kinda seals back up when it expands...what do you guys think about that???...sorry took so long to respond but a lot of things all going on at once right now!