My 2004 VW W8 Auto sedan has recently developed a bad miss-fire. Took it to local experts. They thought it was an issue with the ignition timing (a recall problem). However, the 'fix' did not fix it. They then diagnosed a cam adjuster issue which was going to be a NZ$10K job. I checked on line to find this a problem with this model but for which VW would not do a general recall. I suggested (as read on line ) that they do a engine flush. They did and all seems well. What is your opinion please? Subsequently, following very hot weather, the fan motors have switched on full when starting up car and sometimes over run after ignition switched off. Intermittant. Your opinion also ? Cheers, Laurie

Question 1

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My 93 chevy 350 has issues. I'm Stumped???????????

back firing through the carby is an indication of valve timing, bad valves, ignition timing or crossed HT leads. Check the firing order

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VW will never do a recall !!!

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Yep, ignition coils go bad on these.
They are not too expensive or difficult to fix yourself.
Your local auto parts store probably has a few in stock.
Here's a video on how to do it: https://www.youtube.com/watch?v=0Rkpy4120Tg

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Car was running well then just refused to start.Computer indicated throttle position sensor. Replaced that, then crank sensor, then cam position sensor. Then took car to a repair shop. They thought cam...

its possible there are multiple coil packs usually one for each bank or one for every two cylinders. Or check for a ignition control module

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RE: 2004 VW Passat - Fuel Cap Light and MFI

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Ok, i would ave the ignition coil pack tested for its operational valve asap if possible. this is either an ignition coil pack issue or, a bad ECM. the ECM controls the ignition timing in this vehicle so, the problem will be there if the crank shaft sensor and cam sensors are ok.

I would pull the trouble codes asap as well. this will help diagnosis this issue correctly. this can be done at a local auto zone or a local mechanics shop as well.

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This problem was covered by a national recall. I had mine fixed at no cost to me ($1,500.00 paid by VW). If you have paid to have it fixed VW will reimburse you.

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Question 2

john milligan

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Posted on Feb 17, 2011

john milligan

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As to the mis-fire, it sounds like it was a clogged sensor that the "flush" cleared out. the fans running (I assume that you are speaking of the cooling fans) they are controlled by a sensor on the engine, so the sensor MAY need to be replaced (it can be tested in or out of the car without too much trouble) they are not very expensive so take heart!

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