Weak Battery?

[PlumCrazyDaytona]

So lets just say under cool temps like 50-60 degrees your big cam, high stall converter car runs fins and under high temps, high humidity 80-95 temps with the same humidity car becomes erratic, throttle is unresponsive, cruise does not work, throttle position claims zero rpms remain but speed climbs........voltage reads 13.4 to 13.8....could this lower voltage cause thes type of issues? I am running a underdrive pulley...this gremlin is getting the best of me!!!!

[Mike_Levy]

Its not the battery. That would be weaker in the cold then the heat. Do a log. Most of that stuff could be caused by KR.

[PlumCrazyDaytona]

cool, will do

[PlumCrazyDaytona]

Ok, so lets back up the car and I will list the issues that I can not track down with logs....
Car has been tuned, logs have been watched STKNK, LT KNK as well as AFR and among other pids have been looked at....

Here is what the car will do....and has done it before I installed the Mopar TCM and 3000 stall converter, which when the computers play nice is amazing!!!

So I thought high heat and humidity were causing the issue and a 170 t stat cured the issue, nope just the reflash clearing what ever out of the adaptives..

My car will run great sound great and just like that I downshit from 5-4 or 4-3 or 3-2 or 2-1 and the rpms stay pegged at the rpm of the lower gear...pull the shifter into neutral and the rpms stay pegged under the limiter...stop the car restart and all is good...nail the throttle and its a dog and the car wants to just hang out at the rev limiter.......shut down reflash and alll is good for 1 mile or maybe 500....

I am getting sick of this car!!!!!!!!!!!!!!!!!!!!

Do I really have to reload my tune every couple days? If so I have a car for sale!!!!!!!!!!!!!

[brandy16]

Ok, so lets back up the car and I will list the issues that I can not track down with logs....
Car has been tuned, logs have been watched STKNK, LT KNK as well as AFR and among other pids have been looked at....

Here is what the car will do....and has done it before I installed the Mopar TCM and 3000 stall converter, which when the computers play nice is amazing!!!

So I thought high heat and humidity were causing the issue and a 170 t stat cured the issue, nope just the reflash clearing what ever out of the adaptives..

My car will run great sound great and just like that I downshit from 5-4 or 4-3 or 3-2 or 2-1 and the rpms stay pegged at the rpm of the lower gear...pull the shifter into neutral and the rpms stay pegged under the limiter...stop the car restart and all is good...nail the throttle and its a dog and the car wants to just hang out at the rev limiter.......shut down reflash and alll is good for 1 mile or maybe 500....

I am getting sick of this car!!!!!!!!!!!!!!!!!!!!

Do I really have to reload my tune every couple days? If so I have a car for sale!!!!!!!!!!!!!

Dose this happen when its stock or only with the tune.

[PlumCrazyDaytona]

Not sure, with my cam and heads the car will not run on a stock tune

[Mike_Levy]

What cam are you running? Wondering because with heads and cam (Comp 268), my truck WILL run on a stock tune. Its the 55# injectors that make it need a tune.

[PlumCrazyDaytona]

Running the SRT MAX on a 112 with CNC ported polished heads milled .03

This past weekend I did the TCM relearn pocedure per the MOPAR TCM install guide and so far the car is a ton better. Knock on wood it has been hot and the downshifts are still acting like they should and so far no auto drive at 40, car actually downshifts at 40 on its own and continues to decelerate slowly.

Not sure how much the Mopar TCM going through the relearn procedure makes but I never did it after I put in the stall converter and so far this seems to have helped with the moodiness of the car