Help, what is code 26?
I know it is quad module driver A failure. Which are the sensors handled by quad A? TPS? Coolant temp?
The whole story behind this started a couple of years ago with the idle rpm going up on it'* own with no apparent reason. The only way to make it normal was to turn the engine off and start it again.
Over the time I changed several IAC'*, TPS'* and even ECM'*. No result. I recently checked and replaced all rubber vacuum connections to eliminate all possible leaks, disconnected the Cruise cable so that one isn't pulling the throttle, no result. I am using Tuner Pro RT to get what is ECM seeing from sensors and the only thing is that TPS% and TPS Volts are high corresponding to the increased unwanted idle.
Sometimes I was getting code 22 at idle, and recently I am getting code 26 when accelerating and the engine is not up to normal temperature. Since I changed almost everything I made a new wire harness for the TPS and the CTS (I realized that they share a sensor ground). Although the idle doesn't appear to go up anymore (although I didn't drive it enough to be conclusive) I am still getting code 26 under acceleration and low temp. All of this is directing me to change the CTS even though the Tuner Pro shows the temperature OK.
What is quad A driving?
On a separate note, after seeing on this forum that everybody is so happy with changing the Magnavox to the Delco I tried it too. After changing a dozen ICU'* and coils from car heaven I had to return to my old Magnavox. The engine was misfiring under heavy acceleration. Recently I got new wires, new Delco ICU and new coils yet the car is still misfiring (I can hear isolated explosions in the exhaust confirming that the fuel mixture left the cylinder without having a spark) under heavy acceleration ONLY when the engine temp is up. If the engine is cold the ICU works without missing a beat. This also directs me in the Coolant Temperature Sensor direction.
Anybody knows what is in this quad A?