Misfire?

1. user_19702 Saxperience Forum Bum Joined: Dec 2007 Kendal, Cumbria Posts: 2728 White mk1 VTS

   #1 19th January 2012, 17:13

   Hi everyone, right basicly, my car was running fine, decided to change sparls for peace of mind on friday, all gapped and torqued up, all was fine until last night, i drove from my house to halfords (about a mile and a half) and all was fine, then started her up to head home and it started to missfire
   
   It only missfire's on half throttle, i.e when maintaining speed, when its on idle, or you boot it all is fine, and its not a bad missfire, its just a little jerky, also she is popping and banging a hell of alot more, sounds ace, but the dodgy running is pissing me off.
   
   Ive taken sparks out again and re-done every thing, yet its still doing it, anyone got any ideas?
   
   98' VTS 102k
   
   Thanks
2. Cam Saxperience Post Whore Joined: Nov 2010 Kent Posts: 8439 Gen 7 Celica 190.

   #2 19th January 2012, 17:15

   Id say coilpack is failing mate...
3. mcjacko1987 Established Member Joined: Feb 2011 Rochdale Posts: 1896 mk2 saxo 1.4 furio in possi blue

   #3 19th January 2012, 21:15

   coil pack or an injector getting blocked maybe
4. DundeeUnited Established Member Joined: Nov 2010 Invergowrie Posts: 1006 Saxo VTR

   #4 19th January 2012, 21:22

   tenner that its coilpack, does eml come on ?
5. user_19702 Saxperience Forum Bum Joined: Dec 2007 Kendal, Cumbria Posts: 2728 White mk1 VTS

   #5 21st January 2012, 04:23

   Well was thinking it could off been coil pack, and was hoping it wasn't lol, it just baffels me as to why it only does it on half throttle /: n for a while tnyt it was fine, and then started again, then went fine then started again (andit was hours from working and not working / n no light bud
6. Cam Saxperience Post Whore Joined: Nov 2010 Kent Posts: 8439 Gen 7 Celica 190.

   #6 21st January 2012, 05:15

   My old saxo did it mate, when you drove it gentle was fine more then about 1/3 throttle judder judder lol.
7. MC_ Infrequent Poster Joined: Oct 2011 Maidenhead Posts: 159 '99 MkII VTS

   #7 21st January 2012, 08:19

   Sounds very similar to the problems I had, I changed both the Spark Plugs and the Coilpack to no previal. Turned out to be the MAP sensor and all I needed to do was unplug it and plug it back in. So I'd recommend just unplugging your sensors before spending any more money.
8. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

   #8 21st January 2012, 12:00

   Ht leads plugged back in on the spark plugs properly?
9. user_49404 Frequent Poster Joined: Dec 2010 Mid Wales Posts: 604 03 vtr

   #9 21st January 2012, 12:54

   Quote:

   Originally Posted by MC_ Sounds very similar to the problems I had, I changed both the Spark Plugs and the Coilpack to no previal. Turned out to be the MAP sensor and all I needed to do was unplug it and plug it back in. So I'd recommend just unplugging your sensors before spending any more money.

   or disconnect the battery over night, that will act as resetting the ECU
10. user_19702 Saxperience Forum Bum Joined: Dec 2007 Kendal, Cumbria Posts: 2728 White mk1 VTS

    #10 22nd January 2012, 06:40

    No HT leads, solid coilpack with rubber extentions, and ill try unplugging the MAP then disconnecting the battery, if that doesn't work ill try and borrow my mates off his gti as its off the road atm, fingers crossed I don't have to spend any more coil thanks guys, ill report back asap