Curious first to ask if anyone has tweaked any of their sensors for mods they have done. Such as TPS, MAP, ACT, ECT.
I just wanted to share my benefits with my TPS sensor tweak. I bumped the initial voltage up to about .86-.87 volts. Stock is what? around .68? I have a max of 4.64v. Anything above that max voltage throws a CEL on my car and runs it in limp mode. I'm using a Ford tps on a 70mm tb. This is still with the Charger/Magnum intake and exhaust manifolds on my 2.7. With turning the idle voltage up, the ecm thinks the throttle is open more than it is. Man what a difference. It helped pick up my low end a lot. It also shifts at a higher rpm and shifts much more firm. And it bumped my mileage up a couple mpgs.
Seems I still have a lean condition at higher rpms. My engine falls on its face at 4,000 rpm. Usually, a 2.7 doesn't pick up till close to that. I've confirmed lean condition from pulling plugs after normal driving and after a short drive at higher rpm. I believe its from the larger throttle body and slightly better flowing manifold combination. Its just getting too much air and the stock ecm calibration just can't handle it correctly.
My solution is to tweak the MAP sensor. If I raise the voltage to it, it will richen up my fuel table slightly. A basic "MAP Enhancer" is being built. Jeep guys do this when they build stroker motors. http://jeep-xj.info/HowtoMAPsensor.htm
With what he explains about 80% throttle and below is all O2 controlled, is true for our cars from what I've noticed. My car does accelerate faster at half to 3/4 throttle than it does full. Its also noticeably faster before its warmed up(though I tend not to do this as it is hard on an engine).
Now if it does work out better, I may also make a switch to lower the coolant temp reading to the ECM so I can take advantage of it more when I want to play around.
Thoughts?
I just wanted to share my benefits with my TPS sensor tweak. I bumped the initial voltage up to about .86-.87 volts. Stock is what? around .68? I have a max of 4.64v. Anything above that max voltage throws a CEL on my car and runs it in limp mode. I'm using a Ford tps on a 70mm tb. This is still with the Charger/Magnum intake and exhaust manifolds on my 2.7. With turning the idle voltage up, the ecm thinks the throttle is open more than it is. Man what a difference. It helped pick up my low end a lot. It also shifts at a higher rpm and shifts much more firm. And it bumped my mileage up a couple mpgs.
Seems I still have a lean condition at higher rpms. My engine falls on its face at 4,000 rpm. Usually, a 2.7 doesn't pick up till close to that. I've confirmed lean condition from pulling plugs after normal driving and after a short drive at higher rpm. I believe its from the larger throttle body and slightly better flowing manifold combination. Its just getting too much air and the stock ecm calibration just can't handle it correctly.
My solution is to tweak the MAP sensor. If I raise the voltage to it, it will richen up my fuel table slightly. A basic "MAP Enhancer" is being built. Jeep guys do this when they build stroker motors. http://jeep-xj.info/HowtoMAPsensor.htm
With what he explains about 80% throttle and below is all O2 controlled, is true for our cars from what I've noticed. My car does accelerate faster at half to 3/4 throttle than it does full. Its also noticeably faster before its warmed up(though I tend not to do this as it is hard on an engine).
Now if it does work out better, I may also make a switch to lower the coolant temp reading to the ECM so I can take advantage of it more when I want to play around.
Thoughts?