# 99 Passat 1.8T Misfire, No Clue **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [March 9, 2009, 6:36pm UTC](https://forums.speedlife.net/t/99-passat-1-8t-misfire-no-clue/202157 "2009-03-09T18:36:27Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![PoisonousBeef](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/poisonousbeef/32/6007_2.png) [@PoisonousBeef](https://forums.speedlife.net/u/PoisonousBeef)\ **Post date:** [March 9, 2009, 6:36pm UTC](https://forums.speedlife.net/t/99-passat-1-8t-misfire-no-clue/202157/1 "2009-03-09T18:36:27Z")
99 Passat with the 1.8T CEL is blinking, Misfire on No. 2 Cylinder. Compression is spot on. Swapped both coil pack and plug, no change. Old plug is clean, actually a little cleaner than the other plugs and had a little bit of fuel smell, so it may have been dumping some fuel in at one point but it’s not wet now. I don’t have VAG-COM. Any ideas? ---
**Author:** ![Zack01GC](https://avatars.discourse-cdn.com/v4/letter/z/a183cd/32.png) [@Zack01GC](https://forums.speedlife.net/u/Zack01GC)\ **Post date:** [March 9, 2009, 6:48pm UTC](https://forums.speedlife.net/t/99-passat-1-8t-misfire-no-clue/202157/2 "2009-03-09T18:48:29Z")
Ignition Control Module. That’s what was wrong with mine, sounds like your problem is identical. ---
**Author:** ![vw16vcabby](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/vw16vcabby/32/5943_2.png) [@vw16vcabby](https://forums.speedlife.net/u/vw16vcabby)\ **Post date:** [March 9, 2009, 8:24pm UTC](https://forums.speedlife.net/t/99-passat-1-8t-misfire-no-clue/202157/3 "2009-03-09T20:24:54Z")
i wouldnt jump straight to icm. check closely on the plug. small hairline crack. or is it fouling out? majority of the time it is the coilpack/plug. go see someone w/. a cag com, have them go into —engine/check codes/basic settings. under basuc settings monitor groups 14/15/16-- that will show the misire count for total all 4 plugs, and the number breakdown per each cylinder. ---
**Author:** ![Zack01GC](https://avatars.discourse-cdn.com/v4/letter/z/a183cd/32.png) [@Zack01GC](https://forums.speedlife.net/u/Zack01GC)\ **Post date:** [March 10, 2009, 5:45am UTC](https://forums.speedlife.net/t/99-passat-1-8t-misfire-no-clue/202157/4 "2009-03-10T05:45:05Z")
> [@Official MythBusters "PLANE on a CONVEYOR" episode PARTY!!! (12/12/07 @ 8pm)](https://forums.speedlife.net/t/official-mythbusters-plane-on-a-conveyor-episode-party-12-12-07-8pm/37453/105): > > i wouldnt jump straight to icm. Just saying, mine was having the exact same problems as described, replaced coil pack and plug as well, and nothing changed until I replaced the ICM. ---
**Author:** ![berad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/berad/32/5953_2.png) [@berad](https://forums.speedlife.net/u/berad)\ **Post date:** [March 10, 2009, 6:31am UTC](https://forums.speedlife.net/t/99-passat-1-8t-misfire-no-clue/202157/5 "2009-03-10T06:31:59Z")
sailwhore \> j00, nub. ---
**Author:** ![Zack01GC](https://avatars.discourse-cdn.com/v4/letter/z/a183cd/32.png) [@Zack01GC](https://forums.speedlife.net/u/Zack01GC)\ **Post date:** [March 10, 2009, 7:13am UTC](https://forums.speedlife.net/t/99-passat-1-8t-misfire-no-clue/202157/6 "2009-03-10T07:13:35Z")
> [@WTB: Car cd player](https://forums.speedlife.net/t/wtb-car-cd-player/39663/6): > > sailwhore \> j00, nub. Duh. ---
**Author:** ![PoisonousBeef](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/poisonousbeef/32/6007_2.png) [@PoisonousBeef](https://forums.speedlife.net/u/PoisonousBeef)\ **Post date:** [April 2, 2009, 11:42am UTC](https://forums.speedlife.net/t/99-passat-1-8t-misfire-no-clue/202157/7 "2009-04-02T11:42:51Z")
JTech finally tested the ICM with a multimeter and that was the problem. Part took 5 minutes to install and it’s back on the road. Thanks for the help guys. ---
**Author:** ![berad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/berad/32/5953_2.png) [@berad](https://forums.speedlife.net/u/berad)\ **Post date:** [April 2, 2009, 12:00pm UTC](https://forums.speedlife.net/t/99-passat-1-8t-misfire-no-clue/202157/8 "2009-04-02T12:00:08Z")
🙂 ---
**Author:** ![Zack01GC](https://avatars.discourse-cdn.com/v4/letter/z/a183cd/32.png) [@Zack01GC](https://forums.speedlife.net/u/Zack01GC)\ **Post date:** [April 2, 2009, 1:28pm UTC](https://forums.speedlife.net/t/99-passat-1-8t-misfire-no-clue/202157/9 "2009-04-02T13:28:04Z")
So it _was_ the ICM. :hsugh: ---
**Author:** ![berad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/berad/32/5953_2.png) [@berad](https://forums.speedlife.net/u/berad)\ **Post date:** [April 2, 2009, 2:17pm UTC](https://forums.speedlife.net/t/99-passat-1-8t-misfire-no-clue/202157/10 "2009-04-02T14:17:15Z")
> [@7PSI stock motor?](https://forums.speedlife.net/t/7psi-stock-motor/39864/15): > > So it _was_ the ICM. :hsugh: lol my thoughts. sry sailwhore. Been bitten by that bastard ICM twice! ---
**Author:** ![vw16vcabby](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/vw16vcabby/32/5943_2.png) [@vw16vcabby](https://forums.speedlife.net/u/vw16vcabby)\ **Post date:** [April 6, 2009, 7:02pm UTC](https://forums.speedlife.net/t/99-passat-1-8t-misfire-no-clue/202157/11 "2009-04-06T19:02:00Z")
cant get tehm all. still willing to bet it is the plug/coil over the icm though. didnt i even sell u a used icm berad? or was that 2 tone?