1986 Chevrolet Astro Repair Question
Asked on February 5, 2011
Chevy van
1986 chevy astro 4.3 tbi runs perfect after temperature is normal operating.starts and idles when cold but will not accelerate. replaced temp sensor with new one .engine floods and gives code 15 ,high voltage coolant temp . i have installed,new computer ,prom,calpack,injectors,pressure relief valve,distributer ,module,map sensor,checked vaccum,fuel pressure,replaced coil cap andplug wires. after all of this stillwont run cold
Asked by reefmasterAnswer
Replied on February 5, 2011
There are two temp sensors, not sure which one you replaced? The cts has a two wire connector, yellow and black. The computer monitors the voltage on the yellow wire, stone cold about 5 volts. As the engine warms up, the voltage goes down. If a problem with wiring circuit, voltage won't go down. I need to mention the cts and tps share the same ground, a problem on one sensor circuit can cause a problem for the other sensor.
