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2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

check engine flashing and studdering

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  #1  
Old 06-13-2013, 07:09 AM
DoubleL24 DoubleL24 is offline
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Default check engine flashing and studdering

i have a 99 ram 1500 with 5.9. i dnt drive my truck much during the week and this morning around 40mph it was studdering and the check engine light started flashing then shut off. anyone have any ideas why this is occuring?
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  #2  
Old 06-13-2013, 07:38 AM
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Sounds like a misfire. If there's any codes to read a scanner would tell you what cylinder(s) are misfiring.

I'd start with the #8 plug, and check them one by one.
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Old 06-13-2013, 08:26 AM
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Can you do the key trick on the 99 to read codes? If so, give that a run, and see what you get. (a selection of P03XX codes would be my guess.....)

Have you had a look at your plenum yet? Probably blown....
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Old 06-13-2013, 09:34 AM
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I'm thinking you can on '99, is it '98 that's weird?
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Old 06-13-2013, 09:46 AM
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how do you do the key trick? I replaced the plenum bout year and a half or so ago.
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Old 06-13-2013, 09:59 AM
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Quote:
Originally Posted by DoubleL24 View Post
how do you do the key trick? I replaced the plenum bout year and a half or so ago.
Key on-off on-off on watch the odometer.

How did you replace the plenum? Do anything with the Cat and Pre-Cat O2 sensor yet?
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Last edited by stewie01; 06-13-2013 at 10:02 AM.. Reason: wrong info
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Old 06-13-2013, 10:00 AM
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If it stutters and the CEL is flashing, not only is there a misfire, but I'm betting a plug wire (or more) is/are making contact with an exhaust manifold. When that happens, the insulation melts, causing the outer mesh sheath to make contact and thus grounds the corresponding plug & coil.

Pop the hood and check all plug wires first. Been there, done that.
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Old 06-13-2013, 10:00 AM
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Turn the key on, off, on, off, on. Read codes on the digital odometer.

When is the last time you change plugs/wires/cap/rotor?
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Old 06-13-2013, 10:22 AM
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I'm thinking clogged cat. Try unscrewing the precat o2 and see how it runs.
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Old 06-13-2013, 10:27 AM
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OP, listen to these guys. Before I even read the replies, I knew what to check and these guys already pointed it out.


Key dance trick is 99+ key on/off 3 times with leaving it key on at the end.
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Old 06-13-2013, 10:36 AM
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i replaced plenum with one of the plenum kits think hughes kit. cat is gutted and i did the sparkplug non fouler for the 02 sensors. im going to replace plugs this weekend and ill see how the wires are. wires are fairly newer.
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Old 06-13-2013, 10:38 AM
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Wait, which 02 sensors? If you did both, that's bad. You should have only done it with the post-cat 02, not the pre-cat.
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Old 06-13-2013, 10:39 AM
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You should add that info to your sig, so we know what all has been done to your truck. Anyway, check out the FAQ/DIY section. Lots of good info like this, http://dodgeforum.com/forum/2nd-gen-...code-list.html
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Old 06-13-2013, 10:40 AM
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Quote:
Originally Posted by DoubleL24 View Post
i replaced plenum with one of the plenum kits think hughes kit. cat is gutted and i did the sparkplug non fouler for the 02 sensors. im going to replace plugs this weekend and ill see how the wires are. wires are fairly newer.
Did you follow the TSB regarding the proper routing of the wires? Also, are you certain the wires are connected to the appropriate plug?
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Old 06-13-2013, 10:40 AM
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right. i screwed pre cat in like normal and did it to the post cat
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Old 06-13-2013, 10:41 AM
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Quote:
Originally Posted by VWandDodge View Post
Did you follow the TSB regarding the proper routing of the wires? Also, are you certain the wires are connected to the appropriate plug?
+1 Could have a split wire and it's crossfiring with another.
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right. i screwed pre cat in like normal and did it to the post cat
Oh, okay. That's good. lol
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Old 06-13-2013, 10:42 AM
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Quote:
Originally Posted by zman17 View Post
You should add that info to your sig, so we know what all has been done to your truck. Anyway, check out the FAQ/DIY section. Lots of good info like this, http://dodgeforum.com/forum/2nd-gen-...code-list.html
I dont know how to do add info to my sig. im on my phone and dont see anything. maybe ill try when im on a computer next time.
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Old 06-13-2013, 10:44 AM
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maybe ill replace plugs and wires to this weekend and go fr there.
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Old 06-13-2013, 10:51 AM
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whats a good brand for plug wires? theres so many hard to find a good brand.
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Old 06-13-2013, 10:52 AM
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Do the key trick, pull the plugs for the cylinders it says is misfiring. If it doesn't show any codes pull the plugs anyway and take a look at them before you buy a new set.

Stick to cheap copper cores.... Some like Champion some like Autolite, etc...
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Old 06-13-2013, 10:52 AM
 
 
 
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