16v conversion misfire

1. James93 Frequent Poster Joined: Dec 2012 Gravesend, Kent Posts: 727 106 GTi, MK2 Saxo VTR, Corsa C SXi,

   #1 9th July 2016, 23:14

   Posting this on behalf of a mate. Quicksilver with 16v conversion had issue with fuel pump it wouldn't prime, run it off 12v on a switch and now that works however the car misfires and doesn't rev crisply, once the car warms up its even worse undriveable almost
   
   Tried brand new coil pack
   Injectors
   Map sensor
   Cleaned all earths
   Crank sensor (was one of mine and was working when removed so shouldn't be that)
   
   It's really frustrating as its due on track Tuesday! please excuse if this makes no sense birthday tomorrow and had a few drinks tonight!
2. James93 Frequent Poster Joined: Dec 2012 Gravesend, Kent Posts: 727 106 GTi, MK2 Saxo VTR, Corsa C SXi,

   #2 9th July 2016, 23:30

   Also the fuel pump is 1.4, does that matter?
3. craigyt L-plater Joined: Dec 2011 Posts: 72 S1 rallye turbo 16v Corsa vxr track car Megane est

   #3 10th July 2016, 07:55

   Yeah get a 1.6 pump in there
4. James93 Frequent Poster Joined: Dec 2012 Gravesend, Kent Posts: 727 106 GTi, MK2 Saxo VTR, Corsa C SXi,

   #4 10th July 2016, 23:11

   Okay thanks well the loom we think is wrong, as read about that before causing fuel pump not to run, so we switched it off 12v so it now runs, however could this cause the misfire as the wiring for the pin layout may be different making certain sensors redundant as they don't match up on the pins so say for example fuel pump male to fuel pump female may have map sensor male to fuel pump female and making the car run poorly or is this not the case?
   
   Car starts and runs but it idles poorly and revs very slowly and hesitant, doesn't sound like a cylinder is down but really doesn't sound great, engine was rebuilt before conversion. compression is high etc so engine should be spot on. Really frustrating this cars due on track in 48hours!
5. MuZiZZle Saxperience Post Whore Joined: Jul 2011 Newcastle upon Tyne Posts: 7779 Phase 2 VTS , E61 M5

   #5 10th July 2016, 23:32

   Lash a 16v loom in
6. James93 Frequent Poster Joined: Dec 2012 Gravesend, Kent Posts: 727 106 GTi, MK2 Saxo VTR, Corsa C SXi,

   #6 11th July 2016, 07:32

   It is a 16v loom but it's a 97 loom, and apparently need 99 loom although we was told it was a 99 loom it isn't
7. James93 Frequent Poster Joined: Dec 2012 Gravesend, Kent Posts: 727 106 GTi, MK2 Saxo VTR, Corsa C SXi,

   #7 11th July 2016, 22:55

   Fixed
   
   Turns out crank sensor had caught the flywheel due to not being installed correctly and mashed it up a little, obviously effecting the spark. New sensor in, she's running spot on thankyou to all