Pages: [1]
Author Topic: Misfire Under Boost  (Read 5340 times)
Zacklanduyt
Newbie
*

Karma: +0/-0
Offline Offline

Posts: 14


« on: June 17, 2013, 05:23:18 PM »

Hey guys I am running a stage 2+ which spikes to 19psi and tapers out to about 17-18psi, once I build boost I have a steady misfire that will usually last about 2000rpm and then clear up and pull hard, I have double platinum plugs gapped to about .030 everything else is in working order, what kind of plugs/gap do you guys run? I am aware that it could be coils but any suggestion so I don't have to replace them just yet, also the misfire is definitely random throwing codes for cyl. 2,3,4,5 and 6 s.o coils could be weak but it seems unlikely that they would all go at once, also the misfire didn't start until after I replaced the plugs, and I pulled them all to check for cracks etc. and everything looked good. Thanks for any help you guys can give, also car is a 2001.5 Audi S4
Logged
masterj
Hero Member
*****

Karma: +62/-5
Offline Offline

Posts: 1049



WWW
« Reply #1 on: June 17, 2013, 11:40:16 PM »

Gap them to .028 or even .022
Logged

rnagy86
Sr. Member
****

Karma: +6/-11
Offline Offline

Posts: 367


« Reply #2 on: June 17, 2013, 11:53:32 PM »

F5DP0R and be done with it
Logged
ddillenger
Hero Member
*****

Karma: +641/-21
Offline Offline

Posts: 5640


« Reply #3 on: June 17, 2013, 11:57:14 PM »

BKR7E (or EIX if you're too lazy to replace them every other oil change). .025-.028
Logged

Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!

Email/Google chat:
DDillenger84(at)gmail(dot)com

Email>PM
professor
Sr. Member
****

Karma: +25/-0
Offline Offline

Posts: 409



« Reply #4 on: June 18, 2013, 02:22:56 AM »

Exhaust manifold is stock?
If yes gap the spark plugs or use the f5dp0r and check again.
Logged

Seat Ibiza MK4 Cupra 1.8t 20V, stg3.
"Those 1.8T 20V machines are really tough" ©
QuattroEd
Newbie
*

Karma: +0/-0
Offline Offline

Posts: 16


« Reply #5 on: June 18, 2013, 09:08:09 PM »

whats your AFR in this zone?
Logged
Pages: [1]
  Print  
 
Jump to:  

Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Page created in 0.017 seconds with 17 queries. (Pretty URLs adds 0s, 0q)