I have a 1999 Passat with a 1.8T. I have a misfire on #2 cyl. I began with swaping the coil pack around and it didn't make a diff. Then I tested the supply power to the coil, i have 3 wires 2 the coil, one pos. one neg. and theres nothing on the third. I went to the power stage module on the air box tested continuity from pin 3 to the other 4 pins and they all have the same readings. Is there another module that controls spark to the coil or is there only the ecm and the power stage mod.
1999 Volkswagen passat 1.8t
tested coil and power control stage I have no fire on cyl#2
is there a distributer on this engie or is it distributless also whne did this start what were the conditionsjust for knowlenge the third wire foing to the coil should be for a tach
It started all at once. It doesnt matter if its cold or hot. I origanly thought it was the valve cover gasket was the prob. because the spark plug hole was full of oil.
does it have a distributer or is it a coil pack also what is the condition of the plug
im sorry. no it doesnt have a dist. it has individ. coil packs
i guess what i should ask are you getting any spark at all also have you tried a new wire or a differnt one
i see you already tried a differnt coil so its probley not the coil also have you visually checked for spark along with checking compression
i am not to familular with your car but i will try and help if i cant ill opt out and let aneather expert assist you
basically what im asking is everything that you have tried it could even be somthng so simle as a wire bad to as complex as cam sensor and inorder to give an accurate answer i need as much detail as possible
This car doesnt have wires it has coil packs on each cylinder that insert ito the center of the valve cover. i have good compression on all cylinders. If it was a cmp sensor woudnt that give me a random misfire or only on one cylinder
I just tried a cam sensor but im still having the same prob.
it could do either here let me check something and ill get back to you
well like i said im not to familure with this setup sorry i dont belive i can help you so i will opt out and request aneather expert all i can really offer is check all sensors to do with timing and ensure that the plugs are clean and free of corosion im sure that there is a controller somewere for the coils but im not sure so thank you and good luck one thing i would like to know are you getting any spark at all on it
Thank you for your time any way. No im not getting any spark on that cylinder.
Hi there. I see your problem and understand this is what you need.
Repair: Replace the power stage (ignition output module), partnumber for this car was 4D0-905-351. In stock at the localdealer. Price around $280.
I did a resistance test on the power stage and im getting the same amount of resistance on pin 1,4, & 5 . Is that the correct procedure for testing this unit?
Hi there. The resistance is not the problem but the power to the affected coil is the culprit, it is like number 2 does want to play any more, I have seen this on numbers 1,2 and 4b but never number 3. Later on in the year VW changed and got away from the power stage (ignition output module),. I figure they saw the errors in their ways.
30 years experience full service, all makes and models. I fix cars.
ok thanks I'll put one on
Hi there. Let me know. You are my customer, and I will not stop until your vehicle is fixed.