TruckinSS05 Posted May 8, 2008 Report Share Posted May 8, 2008 Ok heres the story..... Had a 60 amp draw on the battery from the HVAC Control Module which the Dealership repaired by installing a new HVAC Control Module. When I recieved the truck back I immeditaly noticed that it not only was shifting differently but it seemed like it had lost power. So the first thing that came to my mind was they flashed the PCM back to stock. So I called pcmforless.com in Mooresville, NC and they said they would tune it again with the same tune I had performed originally...execpt this time I asked for a more aggressive tune with a 160 thermostat. After getting the retuned pcm back and the new 160 thermostat i install the thermostat and the pcm. Unfortunaly the shifting is not at all as firm as it was when I first had my SS tuned and it does not seem to have quite as much power as it did. So after that mouthful my question is this... when I installed the pcm i did not unplug the battery cable before taking or putting it back in. Would This make a difference in the performance of my truck? I also would like some suggestions on what you guys/gals think I should do to correct this issue. Any help would be greatly appreicated. Thanking in advance, Truckin Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted May 8, 2008 Report Share Posted May 8, 2008 It normally takes a couple hundred miles for a new tune to fully set in........keep driving her, it should get better. Quote Link to comment Share on other sites More sharing options...
brobradh77 Posted May 8, 2008 Report Share Posted May 8, 2008 yeah the battery mess up could have screwed stuff up IMO...try and unhook the battery and uninstall and reinstall the PCM and see if that helps...if not call PCM4less and explain what it is doing..you may have killed the tune with that mistake. Quote Link to comment Share on other sites More sharing options...
TruckinSS05 Posted May 8, 2008 Author Report Share Posted May 8, 2008 yeah the battery mess up could have screwed stuff up IMO...try and unhook the battery and uninstall and reinstall the PCM and see if that helps...if not call PCM4less and explain what it is doing..you may have killed the tune with that mistake. I have already called pcmforless and explained what the truck was doing. She said the battery cable not being unhooked probably did not mess anything up as long as the key was not in. I will try and unhook the battery cable and reinstall the pcm. Will keep everyone updated. Oh btw the first time I had the truck tuned it did not take any time for the tune to set in. Just FYI. Quote Link to comment Share on other sites More sharing options...
brobradh77 Posted May 8, 2008 Report Share Posted May 8, 2008 (edited) yeah it really shouldnt take a few hundred miles...you should notice it immediatley..things like shifting firmness and performance will be noticed immediatly..now maybe overtime it may improve with driving but i dunno..I have made tweaks at a track and noticed a difference immediatly not a couple hiundred miles later Edited May 8, 2008 by brobradh77 (see edit history) Quote Link to comment Share on other sites More sharing options...
12'SROCK Posted May 8, 2008 Report Share Posted May 8, 2008 yeah it really shouldnt take a few hundred miles...you should notice it immediatley..things like shifting firmness and performance will be noticed immediatly..now maybe overtime it may improve with driving but i dunno..I have made tweaks at a track and noticed a difference immediatly not a couple hiundred miles later but it does fell better after driving it for a while too Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted May 8, 2008 Report Share Posted May 8, 2008 but it does fell better after driving it for a while too ^^ That is what I meant.....you will feel it as soon as you install it, but the improvements will be more noticeable the more you drive it. Quote Link to comment Share on other sites More sharing options...
NTMD8R_SS Posted May 8, 2008 Report Share Posted May 8, 2008 Just drive it acouple hundred miles Quote Link to comment Share on other sites More sharing options...
Hankg42 Posted May 8, 2008 Report Share Posted May 8, 2008 I had noticable performance improvements after about an hour of driving. I also have a PCMforLess tune. Quote Link to comment Share on other sites More sharing options...
brobradh77 Posted May 8, 2008 Report Share Posted May 8, 2008 Just drive it acouple hundred miles I hear rodatrip...nothin like some quality SS time...lol Quote Link to comment Share on other sites More sharing options...
TruckinSS05 Posted May 8, 2008 Author Report Share Posted May 8, 2008 I hear rodatrip...nothin like some quality SS time...lol Well here is the update. The shifting is not improved at all after disconnecting the battery cable and reinstalling the pcm. I connected the battery cable back after installing the pcm. I now have another problem. The temp. gauge on the cluster now sits on 160 and does not move. If you cut the engine off and wait like two minutes the guage will sometimes go up to 200 and then it falls back to 160. What the hell is going on?? Can someone please help me with both situations??? Truckin Quote Link to comment Share on other sites More sharing options...
TruckinSS05 Posted May 10, 2008 Author Report Share Posted May 10, 2008 Well here is the update. The shifting is not improved at all after disconnecting the battery cable and reinstalling the pcm. I connected the battery cable back after installing the pcm. I now have another problem. The temp. gauge on the cluster now sits on 160 and does not move. If you cut the engine off and wait like two minutes the guage will sometimes go up to 200 and then it falls back to 160. What the hell is going on?? Can someone please help me with both situations??? Truckin Well as usual. No help. Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted May 10, 2008 Report Share Posted May 10, 2008 Well as usual. No help. I think you need to get a hold of PCMforLess and have them send you a new PCM, something is screwey with that one. Quote Link to comment Share on other sites More sharing options...
brobradh77 Posted May 11, 2008 Report Share Posted May 11, 2008 yeah something is wrong with the PCM Quote Link to comment Share on other sites More sharing options...
sprayed99 Posted May 11, 2008 Report Share Posted May 11, 2008 the stepper motors are also known to go bad in the cluster....it may take another dealer trip to fix the gauge issue........ Who is tuning at PCM4Less now?????? Quote Link to comment Share on other sites More sharing options...
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