Misfire identified fault No 17981 left engine solenoid valve. this was replaced and the car was ok for a day and now it misfires again and smokes when started up. Each time we put it on the machine same fault appears when we clear the codes it is ok fo the rest of the day, then misfires again the next day for a moment when started up.
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Feb 5, 2010 - Uploaded by Scotty Kilmer
Scotty Kilmer, mechanic for the last 46 years and counting, shows how to fix your car if the check engine light ...
If you can supply me with all the codes your vehicle is showing, I can assist you. As far as the P1111 DTC goes I have listed the info below with some possible solutions.
P1111- Intake Valve Timing Control Solenoid Valve Circuit Bank 1
Intake valve timing control solenoid valve is activated by ON/OFF pulse
duty (ratio) signals from the ECM. The intake valve timing control
solenoid valve changes the oil amount and direction of flow through
intake valve timing control unit or stops oil flow.
The longer pulse width advances valve angle. The shorter pulse width
retards valve angle.
When ON and OFF pulse widths become equal, the solenoid valve stops oil
pressure flow to fix the intake valve angle at the control
position. The code is triggered when an improper voltage is sent to the ECM through intake valve timing control solenoid valve. Since the Intake valve
timing control solenoid valve uses oil flow to control timing, dirty oil
can cause the valve to stuck open or close. Before replacing the valve,
change engine oil and filter and reset engine code.
Possible Causes: - Intake valve timing control solenoid valve bank 1 circuit is open or shorted.
- Intake valve timing control solenoid valve bank 1 circuit connectors
- Intake valve timing control solenoid valve bank 1 - Dirty Oil
Possible Solutions: - Change Oil
- Replace Intake valve timing control solenoid valve
Did you notice if there was oil on the spark plug wires after you pulled the wires? If so you may need to replace the valve cover gaskets. They keep oil from going on the spark plug wires which in turn can cause the mis fire.
Your fault need identification after the vehicle is parked for a long time. The nearest possible area of doubt is the condition of the engine. You have not specified the mileage clocked and the regularity of periodic service because if this is done systematically there can be lesser areas to look for in our trouble shooting solution. Hencce to start with your fuel pump, the fuel filter and see if the fuel drains off inthe fuel system when parked for long time. If so identify whether it is in the fuel system or the pump. If fuel seems fine, the engine compression, valve setttings must be in order for a quick start. If this shows good reading, asssesment of the compression of each cylinder by a test of the pressure of air exhausting in each of the cylinders is good. If this looks ok then check on the to the actuator or the auto choke valve. If possible drain off/ run off your fuel and try a different higher grade. I have the feeling that the fault could be the firing or the fuel both of which you can check on alternate days before starting( for petrol check your plugs, your HT coils or replace, for diesel check your glow plugs and replace if bad or worn out ). Hope I could assist. Good day
the problem can be caused by vacuum leaks .. in some engines the vacuum hoses pass above the engine where they can get very hot .. they crack, split or just leak .. this causes several bad things to happen including the secondary air injection problem (vacuum operated valves) ... on at least some cars like the passatt there is a vacuum hose kit available that replaces all the critical hoses .. maybe audi has the same type repair kit ..
vaccum leaks cause this type of misfire . this sometimes happens when someone works on car and does not tighten hoses also could be low fuel pressure or lean fuel caused by air to fuel ratio. i would try vaccum first
it is always a good idea to stay with o.e.m parts and yes there is updated parts in the newer coils. and yes the M.A.F will also cause misfire faults but will not make check engine light flash or make car shake and shudder. also check you wire harness going to your coils make sure your ground wires are not cracked. That could be the main culprate. good luck hope this helps