This is a list of the new parts I have recently installed in this vehicle for reliability and improved performance: Coolant reservoir, coolant level sensor, coolant temperature sensor, upper and lower radiator hoses, radiator, thermostat, coolant flush, new coolant (dexcool - vehicle specified), water pump, water pump pulley, serpentine belt, idler pulley, tensioner assembly, idle air control sensor, idle air control valve, mass air flow sensor, throttle position sensor, canister purge solenoid, EGT valve, spark plugs, spark plug wires, coil packs, upstream o2 sensor. These parts were ordered between Advance Auto and O'Reillys. I had vehicle specific specs in the system so once I clicked to order a part it said Exact fit for your 2001 Chevrolet Malibu LS. One of the last things I changed was the upstream o2 sensor and by the next day I immediately noticed that whenever the coolant level lowered in the reservoir from cooling off from driving the night before, it is leaving a light colored residue that resembles oil in the reservoir which I have not noticed before and I have had this brand new reservoir for a few weeks and have been keeping my eyes on it as well as leaks. The film is the same orangish color of the Dexcool. I am not sure if that is a problem or not, but I wanted to point that out. There is no overheating or coolant leaks since all the major upgrades with the cooling system. The problem did not start until after I begin replacing sensors around the intake system. The vehicle cranks and immediately idles off. Sometimes but, barely, will it stay on. I have no issues driving and coming to a stop as well as running my A/C or heat (It is summer but there have been some random cooler nights). The next issue did not begin until after changing out the upstream o2 sensor. Only but not every time in park will the idle jump and fluctuate between 500 and around 15 to 2000 rpm's then eventually idle off. I cannot figure out for the life of me what I have possibly done wrong. I took the car to Advance and it threw four codes: EGR valve, gas, canister purge solenoid, and IAC valve. With the car running the guy working at Advance unplugged the IAC Valve and immediate no idle issues. He told me that the IAC Valve was failing. He cleared out the code and the engine light remained off. He plugged it back in and I drove home. The engine light never came back on but, when I got home and parked it before cutting it off, the idle began jumping again. Since the IAC Valve was not even a month old, I took it back and warrantied it out. Put the new one on and not even five seconds after cranking the engine light came back on. Took the car to O'Reilly and the same four codes came up as well as the erratic idling. I think I understand the process of resetting and relearning the computers. I take both battery cables off for about ten minutes, I have tried putting the car in drive with the emergency brakes on for two ten minute periods, I have read where you hold the gas for five minutes around 3000 rpm's until the car gets to normal operating temperatures, and I have attempted to do a road to highway back to road drive cycle, but I keep getting the same results after every time over and over again. It cranks and immediately idles off unless I lightly put my foot on the gas for a few seconds as well as in park, especially after having A/C on and cutting off the A/C before cutting off the car, it idles between 500 and 15 to 2000 rpm's several times, then idles off. The air filter is clean and I have cleaned the carbon build up around the butterfly valve in the intake manifold. With all these new parts, either I am not properly retraining my PCM and ECM to relearn the new parts or they are either themselves going bad. I have read about retraining a new idle air control valve and I thought I was doing it with the different ways of starting up the vehicle after having the battery disconnected, but obviously I am not doing something right. Please help. Thanks. Also, should I attempt the IAC valve relearn process as shown in the picture that I have posted or does this even sound like the source of the problem?
have the same problem?
Monday, July 10th, 2017 AT 4:56 PM