Audi A4 The Audi A4 model offers nimble handling and performance that makes it one of the leading cars in its class. Read more about the Audi A4 in the Audi A4 review.
Sponsored by:
Sponsored by:

Misfiring and Running Rich

Thread Tools
 
Search this Thread
 
  #1  
Old 12-17-2006, 04:50 PM
T28_A4's Avatar
1st Gear
Thread Starter
Join Date: May 2006
Location:
Posts: 105
Default Misfiring and Running Rich

16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16687 - Cylinder 3: Misfire Detected
P0303 - 35-00 - -
16686 - Cylinder 2: Misfire Detected
P0302 - 35-00 - -
17535 - Fuel Trim; Bank 1 (Mult): System too Rich
P1127 - 35-00 - -

'01 A4 1.8TQM w/ PES T28 kit..those are the codes im throwing right now...i swapped coil packs to see if they were bad, but theyre fine...so im guessing its the spark plugs...will be ordering some soon....but i only misfire when wot past 5k rpms..
1) Im wondering if the car running rich would cause me to misfire?
2) i did a log on block 032 and the at idle additive is -1.5% which seems fine but the P. throttle mult is -25% which is out of the -10 - 10% its supposed to be between...need some guidance there
3) Everything is passed on my readiness test except for secondary air system and oxygen sensors...
4) Im running 440 cc rc engineering injectors which flow at 43 psi...but i think my fpr is still the stock 4 bar - 54 psi fuel pressure regulator....is this why im running rich?
 
  #2  
Old 12-17-2006, 05:01 PM
Join Date: Nov 2005
Location:
Posts: 12,826
Default RE: Misfiring and Running Rich

all p0300 codes are cylinder misfire which isn't the problem P1127 is your problem excess fuel in the oil/evap canister purge valve which is my guess check for loose fittings or leaks
 
  #3  
Old 12-17-2006, 05:05 PM
Join Date: Nov 2005
Location:
Posts: 12,826
Default RE: Misfiring and Running Rich

OR you didn't start the engine as you thought then the EVAP system would throw a fault to prevent damage to the cat, so im guessing you had a problem starting the engine?? flooded let it dry out then try again
 
  #4  
Old 12-17-2006, 05:22 PM
T28_A4's Avatar
1st Gear
Thread Starter
Join Date: May 2006
Location:
Posts: 105
Default RE: Misfiring and Running Rich

no problems starting the car...is the evap valve supposed to make a clicking noise when u first start the car?
 
  #5  
Old 12-17-2006, 05:32 PM
Join Date: Nov 2005
Location:
Posts: 12,826
Default RE: Misfiring and Running Rich

difficult to answer without codes but the secondary pump should shot off in 2 secs, EVAP clicks as does the fuel pump relay and if this happens thefault is engine/electrics related so perhaps you could explain the problem with more detail

edit: double what the hell I don't like spelling errors
 
  #6  
Old 12-17-2006, 05:35 PM
sean1.8t's Avatar
2nd Gear
Join Date: Dec 2006
Posts: 1,165
Default RE: Misfiring and Running Rich

if you're ever misfiring don't bother checking plugs, just replace them.. if it still happens then i would check wires
 
  #7  
Old 12-17-2006, 05:37 PM
T28_A4's Avatar
1st Gear
Thread Starter
Join Date: May 2006
Location:
Posts: 105
Default RE: Misfiring and Running Rich

there are no codes being thrown for the evap canister purge valve...are there any tests i can run off the vag-com that would help you?
 
  #8  
Old 12-18-2006, 06:43 PM
T28_A4's Avatar
1st Gear
Thread Starter
Join Date: May 2006
Location:
Posts: 105
Default RE: Misfiring and Running Rich

i did the pressure test...all i heard was a bubbling sound from some liquid somewhere towards the driver side on bottom...view from standing in front of the engine looking in. any ideas??
 
  #9  
Old 12-20-2006, 05:30 PM
T28_A4's Avatar
1st Gear
Thread Starter
Join Date: May 2006
Location:
Posts: 105
Default RE: Misfiring and Running Rich

changed plugs...runs a little better now and my coil packs dont pop up anymore...i knew since i was running rich, my plugs would be black, except when i pulled my 3rd cylinder plug out it was clean on the end...was i not getting enough fuel to that cylinder?
also logged this...

 
  #10  
Old 12-20-2006, 06:09 PM
gotaudi's Avatar
1st Gear
Join Date: Sep 2005
Location:
Posts: 228
Default RE: Misfiring and Running Rich

Maybe the ICM looks like majority of the misfires are on #3, Did you log other things?
 


Quick Reply: Misfiring and Running Rich



All times are GMT -4. The time now is 05:29 PM.