VZ Adventra: alloytech misfire diagnosis and fix.

The family trickster has broken down, can I diagnose and fix the problem?
Watch and see.

[@atillaozturk7075]

Rough idle is mostly due to spark plugs.. sluggish acceleration is mostly due to coil packs or fuel pump

[@TAVOTravsDIYGarage]

Was definitely a bad coil pack. Replaced it and is fine now.

[@glencoughlan2209]

You cannot diagnose an Alloytec coil like that, let me tell you first hand, under idle they may fire fine but under load down the freeway they may play up, and they bloodywell do, and sometimes it is more than just the one. Take it from an Alloytec guru, check them under load. Oh and invest in a few timing chains.

[@TAVOTravsDIYGarage]

It was cactus at idle as well, sounded like it was going to stall all the time. Yeah I know about the timing chains.

[@simonmears1726]

Bad ignition coil with normally throw a code which u can read with basic scan tool i like to change all at once like spark plug s nice and fresh

[@TAVOTravsDIYGarage]

Yes you’d be right but in this occasion no code was thrown, but coil was definitely bad. Threw plenty of codes while checking which was bad though.

[@JohnnyBoy357]

How did you know it was that coil ? Did it make a different sound when you unplugged it ? Sorry I’m a bit of a noob haha. Thanks for the vid mate

[@TAVOTravsDIYGarage]

The motor didn’t change when the coil was disconnected, that’s how I knew that was the dud one. It’s hard to hear in the video, but when a good coil is unplugged the rpm change is very noticeable 👍🏻

[@JohnnyBoy357]

@@TAVOTravsDIYGarage ahh ok, thanks so much 👍

[@JohnnyBoy357]

All my coils were good, it was my bloody spark plugs all along.. now she runs like a dream.. thanks mate, you saved me a fortune !

[@TAVOTravsDIYGarage]

@@JohnnyBoy357 Spark plugs, glad you got it sorted.