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  #13  
Old 05-01-2012, 04:42 PM
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Re: Replaced EGR myself, did I miss something?

Quote:
Originally Posted by 05HEMILTD View Post
One more thing, would a faulty TPS throw a code? I have no codes or lights, but between 45-50, with cruise set, it fluctuates in RPM's a bit more than I feel it should, I remember from other forums some WJ and Dakota 4.7 545RFE owners were experiencing similar issues and felt the TPS helped.
I see you're local!

No TPS per se on the 5.7.
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  #14  
Old 07-25-2012, 04:22 PM
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Re: Replaced EGR myself, did I miss something?

Well, sorry to dig up this old thread, but it took me much longer to get around to the various maintenence suggestions from everyone here than I anticipated. Since the last post of replacing the EGR as well as the transmission fluid and filter(s), I had a few more things done and checked off the list today.

CALID files are now up to date from Arrigo Jeep Palm Beach
16 new copper spark plugs gapped and installed professionally
Throttle body cleaned
New PCV valve
And... the slow speed surging remains. Driving me nuts. After the plugs, throttle body, and PCV today, it feels healthier, and the surging is slightly better, but definitely still there. Should I now disconnect the battery again with the clean throttle body to re-learn the fuel/air ration without garbage in the way?
I am at a loss, no codes, up to date files, everythings new, correct oil, 89 octane. It runs like a top if I jump on the throttle, smooth power and crisp shifts. But if I accelerate at a normal in town pace, it surges, and the shift points even seem a little slow/sloppy. Just wanted to report back here to the experts, thanks in advance.
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Old 07-25-2012, 06:58 PM
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Re: Replaced EGR myself, did I miss something?

Seafoam should cure the surge, which is your MDS lifters sticking. Put 1/2 a can into the oil, 1/2 a can through the intake (brake booster line), and then a can in a full gas tank. Run it in the oil for 100 or so miles, then change it, as it gets dirty quickly. I used all the top name fuel system cleaners every 5k, and none did anything worth a darn, but Seafoam did the trick with one application.
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Old 07-25-2012, 07:00 PM
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Re: Replaced EGR myself, did I miss something?

Oh, and yes, you should reset the ecu after cleaning the TB; just disconnect the bsattery neg. terminal for about 20 minutes.
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  #17  
Old 08-09-2012, 10:46 PM
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Re: Replaced EGR myself, did I miss something?

Back again, just got back from the Jeeps first road trip, almost 1000 trouble free miles and an impressive average of 18.2 on the drive to St. Pete. But, still very frustrated with my slow speed surging and occasional drag and surge under hard acceleration. I have not yet done the seafoam, as I must say I'm pretty nervous. But my question is, I see you change the oil quickly after the treatment, and I am just now at 3,000 since my last change, would it be ok to run the seafoam on this oil, then change it? Just figure I would save myself from wasting $40 in oil, or is it better to run seafoam with clean fresh oil and just eat the cost and change it again? I appreciate the feedback, just looking to save a few $$.

dmsfun - I have noticed that in autostick, just leaving it in "4" which disengages the MDS results in smoother operation overall. Since you mentioned it could be the MDS lifters sticking, if the MDS is off, and it makes it better, are those lifters non functional at that time? Which would mean that is a verrrryyyy good posibility?
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