Quote:
Originally Posted by Kris86
Thank you so much for your help and input, I really appreciate it.
We thought it could be the rings being gapped to much, so we pulled the motor and changed the rings for a fresh set. Nothing changed.
We have not really done any breaking in THB, we have taken the car for a 5 minute drive here and there, and had it idling doing fifteen minute data logs here and there.
Was just trying to get a good tune in to be able to drive it around and break it in properly.
Symptoms are, The car starts but has a hard time idling when cold, but when it does warm up, it idles on its own and I can lock it off and turn it back on with out any throttle assistance.
I was just told that due to the poor vacuum the map cannot be cleaned up any further
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What were the rings gapped to?
Honestly if it's running fine when warm, I'd be bedding those rings in asap. You don't want to run it at low loads or idle for too long or the bore surface that the rings bed to will be too smooth to bed the rings in.
Provided it's running and not showing any signs of knock etc I'd run it up, get to around 3000rpm and throttle at 50% and apply load with dyno. Do this for a time then return to idle to give engine components time to cool, then repeat at about 75% throttle 3000rpm and load from dyno to hold it there.
Let it cool etc, swap out fluids and then look into your tuning issues.
Of course this is the procedure I use. But if anyone has issue with it such as your tuner or engine builder, then I'd apply the logic they want to see for bedding the rings in.