This is the second time I have mentioned this problem. My 2014 SHO with LMS tune will sometimes fail to shift and just run up into the red. It happens only at WOT and usually in S but sometimes in D. Just now I attempted to run a 0-60 and had it run up to 6700 RPM in 1st gear in S. I know in the older cars S is full manual mode however in the 14's it is supposed to shift itself and in my case it does 90% of the time. I have had this problem with both my '93v8 perf' and '93v8 perf TS 3bar' tunes but never on the stock tune. Is there any datalogging I can do for LMS to help them fix this problem? Has anyone else run into this issue? Also does anyone think those couple of 6700 RPM spikes could have effected the engine life?
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2014 SHO not shifting properly.
- Thread starter sunwolf
- Start date
Seems to early in the life, but could be a leaky wastegate, PCM tries to compensate by raising RPM. I thought you could monitor various parameters using the MyCal even if you can't "datalog". Best to ask LMS for help.
A couple of spikes shouldn't damage engine life at all. Are you running a known, good 93? Rich pointed out earlier about winter gas having arrived. Did the problem start happening around the Sept-Oct timeframe? Might want to try octane booster of some sort (e.g., Torco) on the next fillup, see if it helps.
A couple of spikes shouldn't damage engine life at all. Are you running a known, good 93? Rich pointed out earlier about winter gas having arrived. Did the problem start happening around the Sept-Oct timeframe? Might want to try octane booster of some sort (e.g., Torco) on the next fillup, see if it helps.
Do not use octane booster,could damge your 02 sensors or even cat's,only a select few would help,or a good F.I cleaner like BBK or chevron cleaner.sunwolf said:I have had this problem since I got my tune back in late august/early September with 4000 miles on the car. I use sams club gas which I have heard is the same as BP. As far as octane booster should I use actual octane booster or is a gallon of e85 going to be better?
I had the same problem last winter with the hesitation at wot,due to the winter blend gas we all mention decreases the performance in our cars,LMS emailed me a 93CW TUNE for the winter only,the cold weather tune did help with the hesitation and then switched to the 93V8,3BAR-170,DP,tune and and car seems to run top notch.
There is no hesitation, it shoots up just over 6000 rpm, disengages to shift into the next gear, then instead of shifting it just bounces off the rev limiter until I take m foot off the gas. I could hold my foot down for ten seconds (not that I would ever let it go that long) and it would be like the car is in neutral bouncing off 6700 RPM with the tach needle red. It isn't until I take my foot off the gas that it revs down to about 3000 RPM and SLAMS into the next gear. I was having this problem in late august/early September also which I think was before winter gas. I will try to get it on video some time.ZSHO said:I had the same problem last winter with the hesitation at wot,due to the winter blend gas we all mention decreases the performance in our cars,LMS emailed me a 93CW TUNE for the winter only,the cold weather tune did help with the hesitation and then switched to the 93V8,3BAR-170,DP,tune and and car seems to run top notch.
The plugs are they gapped correctly at 0.30.sunwolf said:I Apologize a little biThere is no hesitation, it shoots up just over 6000 rpm, disengages to shift into the next gear, then instead of shifting it just bounces off the rev limiter until I take m foot off the gas. I could hold my foot down for ten seconds (not that I would ever let it go that long) and it would be like the car is in neutral bouncing off 6700 RPM with the tach needle red. It isn't until I take my foot off the gas that it revs down to about 3000 RPM and SLAMS into the next gear. I was having this problem in late august/early September also which I think was before winter gas. I will try to get it on video some time.ZSHO said:I had the same problem last winter with the hesitation at wot,due to the winter blend gas we all mention decreases the performance in our cars,LMS emailed me a 93CW TUNE for the winter only,the cold weather tune did help with the hesitation and then switched to the 93V8,3BAR-170,DP,tune and and car seems to run top notch.
glock-coma
New member
Have you tried going back to stock to see of the problem is still present?
Plugs are stock.ZSHO said:The plugs are they gapped correctly at 0.30.sunwolf said:I Apologize a little biThere is no hesitation, it shoots up just over 6000 rpm, disengages to shift into the next gear, then instead of shifting it just bounces off the rev limiter until I take m foot off the gas. I could hold my foot down for ten seconds (not that I would ever let it go that long) and it would be like the car is in neutral bouncing off 6700 RPM with the tach needle red. It isn't until I take my foot off the gas that it revs down to about 3000 RPM and SLAMS into the next gear. I was having this problem in late august/early September also which I think was before winter gas. I will try to get it on video some time.ZSHO said:I had the same problem last winter with the hesitation at wot,due to the winter blend gas we all mention decreases the performance in our cars,LMS emailed me a 93CW TUNE for the winter only,the cold weather tune did help with the hesitation and then switched to the 93V8,3BAR-170,DP,tune and and car seems to run top notch.
Please if you have some time and remove one spark plug and see whats the gap on it,if its stock probably would be between 0.32-0.37,they always recommend installing new plugs gapped at 0.30 when you have a tune,avoid predetonation,misfires,honestly would just install some new SP-534 and they usually come pregapped at 0.30 and use some dielectric grease on the boots liberally and should take you about one hour.
HOW;S YOUR MPG AT THE MOMENT?sunwolf said:Plugs are stock.ZSHO said:The plugs are they gapped correctly at 0.30.sunwolf said:I Apologize a little biThere is no hesitation, it shoots up just over 6000 rpm, disengages to shift into the next gear, then instead of shifting it just bounces off the rev limiter until I take m foot off the gas. I could hold my foot down for ten seconds (not that I would ever let it go that long) and it would be like the car is in neutral bouncing off 6700 RPM with the tach needle red. It isn't until I take my foot off the gas that it revs down to about 3000 RPM and SLAMS into the next gear. I was having this problem in late august/early September also which I think was before winter gas. I will try to get it on video some time.ZSHO said:I had the same problem last winter with the hesitation at wot,due to the winter blend gas we all mention decreases the performance in our cars,LMS emailed me a 93CW TUNE for the winter only,the cold weather tune did help with the hesitation and then switched to the 93V8,3BAR-170,DP,tune and and car seems to run top notch.
Thats pretty good,keep us updated concerning the plugs,0.30.sunwolf said:My MPG is about 18-19 but it ranges from 16 to 22 depending on how I'm driving that day.
Just finished gaping plugs to .030. They were closer to .030 than .035 from the factory. Now they are a tight .030. Also installed my 3 bar and 160* thermostat. No problems so far other than the gas mileage dropping to 14.ZSHO said:Thats pretty good,keep us updated concerning the plugs,0.30.sunwolf said:My MPG is about 18-19 but it ranges from 16 to 22 depending on how I'm driving that day.
Apologize been a little bit under the weather as of late,first of all hopefully you resolved your issue,on my last post asked you for a reason regarding your mpg,cause as of 9/1 we started to use winterblend gas and me personally i'm getting 13.4-14.0 mpg with almost the same tune as you,with the sacrifice of the mpg you should see better performance out of your car compared to before,glad you gapped the plugs at 0.30 the more boost the closer the gap has to be to prevent misfires,spark blowout,predetonation.
Thanks Rich,went to see the DR the other day and guess what,he's sick to,lol.SHOnUup said:With the winter blend gas upon us I'd highly suggest running a 91 tune or boosting the octane with one of the suggested products the gurus have mentioned. My knock readings were pretty bad with the arrival of it.
Hope you get well soon ZSHO.
Rich
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