wnaplay1647545503 Posted March 5, 2014 Report Share Posted March 5, 2014 Buddy was driving this back from michigan last week and around toledo it started running rough at 25mph and lower. Anything above that it seemed fine. He took it to a guy who thought it was a camshaft sensor but he replaced that and still exists. Said mechanic may have said something melted but still trying to get more details. Took it to a dealership who said something similar but wanted to do the same thing as the first guy but couldnt guatantee it would fix the problem. Any ideas. Quote Link to comment Share on other sites More sharing options...
STEVE-O Posted March 5, 2014 Report Share Posted March 5, 2014 Need to know if it has any codes, running rough could be caused by 20+ problems Quote Link to comment Share on other sites More sharing options...
wnaplay1647545503 Posted March 6, 2014 Author Report Share Posted March 6, 2014 Unfortunately the guy lives an hr away so I havent been able to see the truck myself and her has no mechanical ability. Said he had a crankshaft sensor code. Mechanic charged him $400 to replace something that had been melted. Still the problem wasn't solved so he took it to a dealer that wanted to replace the part again but with an oem one and they stated something about low compression in a valve area, again him trying to explain it to me is like pulling teeth because he has no idea what the dealer told him. Again it drives fine above 25 mph and like shit below. Quote Link to comment Share on other sites More sharing options...
Turbs3000 Posted March 6, 2014 Report Share Posted March 6, 2014 Now obviously it could be 1 of a million things but the only experience I had similar was years ago in my 01 explorer ST with the 4.0 v6. the TPS sensor went bad ($10 part, 30 second install) and it drove like a huge turd at low speeds. Though if I recall correctly it would surge at idle as well so it may not be what hes suffering from. Quote Link to comment Share on other sites More sharing options...
DOZZER Posted March 7, 2014 Report Share Posted March 7, 2014 Did they replace just the sensor or the whole synchronizer? Quote Link to comment Share on other sites More sharing options...
wnaplay1647545503 Posted March 7, 2014 Author Report Share Posted March 7, 2014 Finally got a chance to talk with him about it. They replaced the synchronizer I believe because they stated it was melted. They also replaced the sensor. Problem exists. They also told him one of the valves was at 50% compression(never heard of valve compression in terms like this so this is beyond me). Could this be as simple as a faulty aftermarket sensor or what should I suggest he check? Quote Link to comment Share on other sites More sharing options...
STEVE-O Posted March 7, 2014 Report Share Posted March 7, 2014 If it has a slight Mis for whatever reason as the speed and Roma increase it will be less noticeable but still there Quote Link to comment Share on other sites More sharing options...
Berto Posted March 7, 2014 Report Share Posted March 7, 2014 I had a similar-ish problem There was a rubber hose in the back of engine. In the middle but closer to the passenger side. It has rubbed through. I was getting a lean condition fault. Might be worth looking. I found it spraying starter fluid in the engine bay. Worth a check. Quote Link to comment Share on other sites More sharing options...
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