Converter unlocking issues
Converter unlocking issues Hey everyone. I recently installed an SS4000 in my car and thought I had everything tuned appropriately but I have been encountering an issue in the past week or two.
At lockup speeds around 60+ I am getting random unlocks on the converter. It seems to be happening more during the daytime when it is warmer as opposed to late at night after it has cooled down a good bit. Each time that I notice the issue, my ECT is 190+.
I am wondering if this might be due to the smaller rotating mass of the aftermarket converter causing the crank to ripple report random misfires because of the changed in the rotations. I am not getting any DTC codes at all and have not touched the misfire tables in HPT yet. I just wanted to get some opinions as to possible causes before I went in and started changing tables on a whim.
Thanks in advance guys.
At lockup speeds around 60+ I am getting random unlocks on the converter. It seems to be happening more during the daytime when it is warmer as opposed to late at night after it has cooled down a good bit. Each time that I notice the issue, my ECT is 190+.
I am wondering if this might be due to the smaller rotating mass of the aftermarket converter causing the crank to ripple report random misfires because of the changed in the rotations. I am not getting any DTC codes at all and have not touched the misfire tables in HPT yet. I just wanted to get some opinions as to possible causes before I went in and started changing tables on a whim.
Thanks in advance guys.
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Joined: Mar 2012
Posts: 248
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From: oklahoma
I have a ss4000 and when i installed it i had FROST tune my computer and he set it to lock up at 42mph. When you install a converter you need a tune. The reason is there is so much weight difference between the new and stock converter, your cam sensors are picking up spark knock and pulling timing.
I have a ss4000 and when i installed it i had FROST tune my computer and he set it to lock up at 42mph. When you install a converter you need a tune. The reason is there is so much weight difference between the new and stock converter, your cam sensors are picking up spark knock and pulling timing.
I think I finally might have an idea as to what is causing the issue. Usually the converter won't lock back up right away if I take my foot off the gas, but recently I have found that if I tap the brakes, boom it locks right back up. So I contorted myself under the dash and played around with adjusting the brake light switch further away from the brake pedal then all the way flush with it and neither one really made a difference so it could be that the switch itself is faulty. I've put in an order for a new one and once it arrives I have my fingers crossed that it will finally put this problem to rest.
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Simular situation, mine won't lock up consistantly and when it does its awsome. Once locked it won't unlock but once I let off going down a hill (coasting) when I get back on the throttle it won't lock for maybe a couple miles. Its really sucks when your going back up the hill and the rpms went from 2200 down the hill to 2800 slipping up the hill. Mine is only a 3000 stall ati lockup. I"m getting ready to travel in a couple weeks to the street machine nats. in Springfield Mo and its gonna be hilly and don't want to fight that issue for 200 miles there and 200 miles home.
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Simular situation, mine won't lock up consistantly and when it does its awsome. Once locked it won't unlock but once I let off going down a hill (coasting) when I get back on the throttle it won't lock for maybe a couple miles. Its really sucks when your going back up the hill and the rpms went from 2200 down the hill to 2800 slipping up the hill. Mine is only a 3000 stall ati lockup. I"m getting ready to travel in a couple weeks to the street machine nats. in Springfield Mo and its gonna be hilly and don't want to fight that issue for 200 miles there and 200 miles home.
I am halfway tempted to swap to a manual with all these problems.
