Notices
Drivetrain Gearbox, Diffs & Driveshafts etc

Bad missfire

Thread Tools
 
Search this Thread
 
Old 10 October 2004, 12:34 PM
  #1  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default Bad missfire

Real bad missfire at 3500 to 4000 revs, exhaust very black soot ,
Old 11 October 2004, 10:54 AM
  #2  
David_Wallis
Scooby Regular
 
David_Wallis's Avatar
 
Join Date: Nov 2001
Location: Leeds - It was 562.4bhp@28psi on Optimax, How much closer to 600 with race fuel and a bigger turbo?
Posts: 15,239
Likes: 0
Received 1 Like on 1 Post
Default

Plugs, coilpacks, ignitor module.. cracked piston / ringland... sticky valve

Erm..

David
Old 11 October 2004, 05:31 PM
  #3  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default

Oil in fmic pipes , fitted new plugs, car really strugleing to go over 3000 revs, turbo does not seem to kick in , Got a mates TDo5 to try that, >> any ideas, cheers,

Last edited by alanbell; 11 October 2004 at 07:31 PM. Reason: say thanks to david,
Old 11 October 2004, 07:45 PM
  #4  
David_Wallis
Scooby Regular
 
David_Wallis's Avatar
 
Join Date: Nov 2001
Location: Leeds - It was 562.4bhp@28psi on Optimax, How much closer to 600 with race fuel and a bigger turbo?
Posts: 15,239
Likes: 0
Received 1 Like on 1 Post
Default

as I said to steven, check all the plugs, if all are oily then turbo oil seals, if just one or two then do a compression test.

Eitherway a compression test might be an idea before swapping turbos.

David
Old 11 October 2004, 07:56 PM
  #5  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default

David the old plugs were very black dry soot , like its running very rich, after swopping them , the car was just as bad, it seems to be strugleing to go, ??????
Old 11 October 2004, 08:21 PM
  #6  
chrome
Scooby Regular
 
chrome's Avatar
 
Join Date: Jun 2002
Location: Nottingham
Posts: 5,285
Likes: 0
Received 0 Likes on 0 Posts
Default

hope it's not terminal ...
Old 11 October 2004, 08:26 PM
  #7  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default

Cheers mate >> what ever it is it will mend >>>>>> Just got to find some-one to do it ?? Local scoob garage will not really help cos of the mods on it !!! but someone somewere ??????????? cheers
Old 11 October 2004, 08:36 PM
  #8  
chrome
Scooby Regular
 
chrome's Avatar
 
Join Date: Jun 2002
Location: Nottingham
Posts: 5,285
Likes: 0
Received 0 Likes on 0 Posts
Default

maybe ask wallis/Steven for an 'over the phone' step by step guide to Compression testing?
Old 11 October 2004, 09:01 PM
  #9  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default

Yep there allready,
Old 12 October 2004, 10:58 AM
  #10  
RRH
Scooby Regular
 
RRH's Avatar
 
Join Date: Dec 2001
Location: Just far enough from sunny Liverpool
Posts: 6,963
Likes: 0
Received 0 Likes on 0 Posts
Default

also check the induction hoses- the hose that comes from the front of the intercooler can leak and cause this problem.
Old 12 October 2004, 11:05 AM
  #11  
P20SPD
Drag it!
iTrader: (1)
 
P20SPD's Avatar
 
Join Date: Jun 2002
Location: Flame grilled Wagon anyone?
Posts: 9,866
Likes: 0
Received 0 Likes on 0 Posts
Default

Alan, give me a ring tonight if you are no further forward. I can compression test it for you if need be, but it would be easier if your garage did it due to it being next door.

Report back with the results, and we will sort something out.

Wallis and i can do the work for you, as previously discussed, just let me know and we will suggest the best route to solving your problem.

Steven
Old 12 October 2004, 12:45 PM
  #12  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default

Ive checked all hoses, The turbos not working at 3500 revs like it used to . it does not seem to work at all, the engine just struggles to go, Garage next door was going to swop turbo over tomorrow, Alan,
Old 12 October 2004, 06:03 PM
  #13  
chrome
Scooby Regular
 
chrome's Avatar
 
Join Date: Jun 2002
Location: Nottingham
Posts: 5,285
Likes: 0
Received 0 Likes on 0 Posts
Default

dont suppose turbo chucked something nasty into the block??
debris/vane?
unlikely Im sure.. just clutching at straws (again)
Old 13 October 2004, 01:04 PM
  #14  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default

Done a compression test this morning it was OK, Now trying to borrow a maff to try that,
Old 13 October 2004, 01:17 PM
  #15  
P20SPD
Drag it!
iTrader: (1)
 
P20SPD's Avatar
 
Join Date: Jun 2002
Location: Flame grilled Wagon anyone?
Posts: 9,866
Likes: 0
Received 0 Likes on 0 Posts
Default

if it isnt that alan, then let them change the turbo over.
Old 14 October 2004, 01:19 PM
  #16  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default

Got a Maf (thanks Andy) >> not that,????
Old 14 October 2004, 05:02 PM
  #17  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default

changed the coil packs >> not that , ?????
Old 14 October 2004, 05:31 PM
  #18  
David MY99
Scooby Regular
 
David MY99's Avatar
 
Join Date: Mar 2003
Location: The Netherlands
Posts: 370
Likes: 0
Received 0 Likes on 0 Posts
Default

if you have bigger injectors.....take a look if all of them are stil making good contact
Old 14 October 2004, 06:03 PM
  #19  
chrome
Scooby Regular
 
chrome's Avatar
 
Join Date: Jun 2002
Location: Nottingham
Posts: 5,285
Likes: 0
Received 0 Likes on 0 Posts
Default

I dont suppose you've thought about ECU ?
Might be a try if you can loan one for a short test?

did the turbo get changed? was everything looking normal?
Old 14 October 2004, 06:14 PM
  #20  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default

I have 550 injectors, not looked there yet, My ecu is apexi power , Thats why we can not use a subaru plug in fault finder, Not swopped turbo yet,
Old 14 October 2004, 09:53 PM
  #21  
P20SPD
Drag it!
iTrader: (1)
 
P20SPD's Avatar
 
Join Date: Jun 2002
Location: Flame grilled Wagon anyone?
Posts: 9,866
Likes: 0
Received 0 Likes on 0 Posts
Default

Check all pipes to the map sensor, they may be split?

Did you check the injectors by pulling the elctrical connector off, 1 by 1 to see if it makes a difference at idle.

I dont understand why its idling badly if none of the above make any difference.

Do you have the original ecu?
Old 14 October 2004, 11:25 PM
  #22  
Andy.F
Subaru Tuning Specialist
 
Andy.F's Avatar
 
Join Date: Jun 2002
Location: 7.74 @179 mph 1/4 mile - road legal
Posts: 6,654
Likes: 0
Received 1 Like on 1 Post
Default

You can view all the engine sensor values via the Apexi FC Commander handset if you can borrow one ?
Fuel pressure ?
Old 15 October 2004, 11:28 AM
  #23  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default

No not got original ecu, I will get injectors checked today, Jonny Gavs coming over on Sunday with his Commander handset , >>> When it misses at 3500 revs plus , Black smoke comes from it , ??????
Old 16 October 2004, 01:12 PM
  #24  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default

not the injectors,
Old 16 October 2004, 02:17 PM
  #25  
P20SPD
Drag it!
iTrader: (1)
 
P20SPD's Avatar
 
Join Date: Jun 2002
Location: Flame grilled Wagon anyone?
Posts: 9,866
Likes: 0
Received 0 Likes on 0 Posts
Default

did you check the pipes to the map sensor?
Old 17 October 2004, 04:28 PM
  #26  
alanbell
Scooby Regular
Thread Starter
iTrader: (6)
 
alanbell's Avatar
 
Join Date: Feb 2003
Location: Yorkshire.
Posts: 6,824
Received 3 Likes on 3 Posts
Default

At last , Jonny Gav came to York today , checked everything, ended up been the Fuel pressure recolater, big thanks to Jonny >> I was very stuck, and thanks to all above for your ideas, cheers,
Old 17 October 2004, 05:11 PM
  #27  
chrome
Scooby Regular
 
chrome's Avatar
 
Join Date: Jun 2002
Location: Nottingham
Posts: 5,285
Likes: 0
Received 0 Likes on 0 Posts
Default

which reg was it that you were using Alan?
Old 17 October 2004, 05:43 PM
  #28  
Bob Rawle
Ecu Specialist
 
Bob Rawle's Avatar
 
Join Date: Mar 1999
Location: Swindon
Posts: 3,938
Likes: 0
Received 1 Like on 1 Post
Default

Hmm if its an FSE I've got to the point where I am NOT suggesting the use of one, I'd rather map to the oem reg on earlier than MY01 cars than take the risk that the reg may go faulty at some indeterminate point in time.

bob
Old 17 October 2004, 05:48 PM
  #29  
chrome
Scooby Regular
 
chrome's Avatar
 
Join Date: Jun 2002
Location: Nottingham
Posts: 5,285
Likes: 0
Received 0 Likes on 0 Posts
Default

GB on SX?
Old 17 October 2004, 06:06 PM
  #30  
Andy.F
Subaru Tuning Specialist
 
Andy.F's Avatar
 
Join Date: Jun 2002
Location: 7.74 @179 mph 1/4 mile - road legal
Posts: 6,654
Likes: 0
Received 1 Like on 1 Post
Default

Go for it mate, or an aeromotive, I'll have one


Quick Reply: Bad missfire



All times are GMT +1. The time now is 07:20 AM.