Help! misfires on ALL cylinders.....
#1
Help! misfires on ALL cylinders.....
OK, I am new to all this computer stuff.So bear with me if I don't have all the info. I have a 1998 A4 Z28 (lid,ported MAF,MACs,Yank 3200s stall, and Milkman tuning) that has been having some issues lately. I bought Autotap last week and here is what I found on 3 logged drives to work, never getting about 3,5000 RPM's. The numbers below constantly changed, but here is a freeze-frame of them:
Cylinder mode misfire Index level 1------19,703
Cylinder mode misfire index -------------53
Current misfires------------------------64
Misfire History--------------------------64
Cylinder 1 misfire-----------------------64
Cylinder 2 misfire-----------------------64
Cylinder 3 misfire-----------------------64
Cylinder 4 misfire-----------------------64
Cylinder 5 misfire-----------------------64
Cylinder 6 misfire-----------------------64
Cylinder 7 misfire-----------------------64
Cylinder 8 misfire-----------------------64
Timing---------------------------------- minus 49.5*
Knock retard---------------------------5.6*
TCC mode-----------------------------10
TCC Slip speed-------------------------29rpm
Trans input shaft speed----------------1.3rpm
TCC Duty cycle------------------------58.4%
Trans pressure------------------------10psi
Trans Temp---------------------------140*
My fuel trims are bouncing between -60% and -81%, both long and short terms.I also have an issue with my transmission not shifting at WOT and I think my Yank 3200 stall has something to do with it. My car surges at idle and almost acts like the converter is locking and unlocking but I'm not sure how to tell if it's locked or not with Auto-tap.I "think" those fuel numbers mean that I'm running rich but I'm not sure.... Thanks for any help guys, I'm kinda stumped!
Cylinder mode misfire Index level 1------19,703
Cylinder mode misfire index -------------53
Current misfires------------------------64
Misfire History--------------------------64
Cylinder 1 misfire-----------------------64
Cylinder 2 misfire-----------------------64
Cylinder 3 misfire-----------------------64
Cylinder 4 misfire-----------------------64
Cylinder 5 misfire-----------------------64
Cylinder 6 misfire-----------------------64
Cylinder 7 misfire-----------------------64
Cylinder 8 misfire-----------------------64
Timing---------------------------------- minus 49.5*
Knock retard---------------------------5.6*
TCC mode-----------------------------10
TCC Slip speed-------------------------29rpm
Trans input shaft speed----------------1.3rpm
TCC Duty cycle------------------------58.4%
Trans pressure------------------------10psi
Trans Temp---------------------------140*
My fuel trims are bouncing between -60% and -81%, both long and short terms.I also have an issue with my transmission not shifting at WOT and I think my Yank 3200 stall has something to do with it. My car surges at idle and almost acts like the converter is locking and unlocking but I'm not sure how to tell if it's locked or not with Auto-tap.I "think" those fuel numbers mean that I'm running rich but I'm not sure.... Thanks for any help guys, I'm kinda stumped!
#3
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The timing value is insane and the misfire numbers
are suspiciously identical. You should see some low
(lower), random level of misfires; with a stock motor,
3000RPM converter it's still onesy-twosey for me
unless something is wrong. I don't trust that perfect,
binary value there on all 8.
I thought -25% was the fuel trim limit and beyond
that, it would just clip and set a code. Never heard
of -81% fuel trims.
I wonder if ATAP is perhaps misreading the vehicle
type and misinterpreting scale factors?
are suspiciously identical. You should see some low
(lower), random level of misfires; with a stock motor,
3000RPM converter it's still onesy-twosey for me
unless something is wrong. I don't trust that perfect,
binary value there on all 8.
I thought -25% was the fuel trim limit and beyond
that, it would just clip and set a code. Never heard
of -81% fuel trims.
I wonder if ATAP is perhaps misreading the vehicle
type and misinterpreting scale factors?
#5
Originally Posted by jimmyblue
The timing value is insane and the misfire numbers
are suspiciously identical. You should see some low
(lower), random level of misfires; with a stock motor,
3000RPM converter it's still onesy-twosey for me
unless something is wrong. I don't trust that perfect,
binary value there on all 8.
I thought -25% was the fuel trim limit and beyond
that, it would just clip and set a code. Never heard
of -81% fuel trims.
I wonder if ATAP is perhaps misreading the vehicle
type and misinterpreting scale factors?
are suspiciously identical. You should see some low
(lower), random level of misfires; with a stock motor,
3000RPM converter it's still onesy-twosey for me
unless something is wrong. I don't trust that perfect,
binary value there on all 8.
I thought -25% was the fuel trim limit and beyond
that, it would just clip and set a code. Never heard
of -81% fuel trims.
I wonder if ATAP is perhaps misreading the vehicle
type and misinterpreting scale factors?
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#8
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Location: Princeton, IN
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Originally Posted by nikkev
I am going to get some new knock sensors and try those.......
Yes 98's have been known for bad knock sensors but I think you have other problems.
Can you give us some more details? Like when did this all start? Any changes made to the car right before? What did you notice 1st?
A lot of things can affect your Trans not shifting... maybe converter but it could also be related to the pcm
#9
Originally Posted by dissonance
I don’t think knock sensors will fix your problem...
Yes 98's have been known for bad knock sensors but I think you have other problems.
Can you give us some more details? Like when did this all start? Any changes made to the car right before? What did you notice 1st?
A lot of things can affect your Trans not shifting... maybe converter but it could also be related to the pcm
Yes 98's have been known for bad knock sensors but I think you have other problems.
Can you give us some more details? Like when did this all start? Any changes made to the car right before? What did you notice 1st?
A lot of things can affect your Trans not shifting... maybe converter but it could also be related to the pcm
#10
More info that will hopefully help. I threw the tranny info in there to see if any A4 gurus knew why it wouldn't shift at WOT!
2,674 RPM's:
Bank 1 O2-------315mv
Bank 2 O2-------705mv
Long term fuel bank 1-----0.8%
Long term fuel bank 2-----1.6%
Short term fuel bank 1----0%
Short term fuel bank 2----9.4%
Cam signal low---64 counts
Cam signal high---64 counts
Misfires (all 8 cyl)-64 counts
Ign Volts---------4.7 volts
Knock retard -----4.1*
MAF sensor 1-----0.049 lb/min
Rich/lean to lean/rich ratio---2.94:1
Trans temp------145*
Trans shaft input----5.9 RPM's
Trans sahft output---5.9 RPM's
5,388 RPM's:
Bank 1 O2-------110mv
Bank 2 O2-------870mv
Long term fuel bank 1-----0%
Long term fuel bank 2-----0%
Short term fuel bank 1----0%
Short term fuel bank 2----0%
Cam signal low---181 counts
Cam signal high---181 counts
Misfires (all 8 cyl)-181 counts
Ign Volts---------18.1 volts
Knock retard -----15.9*
MAF sensor 1-----0.187 lb/min
Rich/lean to lean/rich ratio---11.31:1
Shift delay-------4.53 sec
Trans temp------286*
Trans shaft input----22.6 RPM's
Trans sahft output---22.6 RPM's
2,674 RPM's:
Bank 1 O2-------315mv
Bank 2 O2-------705mv
Long term fuel bank 1-----0.8%
Long term fuel bank 2-----1.6%
Short term fuel bank 1----0%
Short term fuel bank 2----9.4%
Cam signal low---64 counts
Cam signal high---64 counts
Misfires (all 8 cyl)-64 counts
Ign Volts---------4.7 volts
Knock retard -----4.1*
MAF sensor 1-----0.049 lb/min
Rich/lean to lean/rich ratio---2.94:1
Trans temp------145*
Trans shaft input----5.9 RPM's
Trans sahft output---5.9 RPM's
5,388 RPM's:
Bank 1 O2-------110mv
Bank 2 O2-------870mv
Long term fuel bank 1-----0%
Long term fuel bank 2-----0%
Short term fuel bank 1----0%
Short term fuel bank 2----0%
Cam signal low---181 counts
Cam signal high---181 counts
Misfires (all 8 cyl)-181 counts
Ign Volts---------18.1 volts
Knock retard -----15.9*
MAF sensor 1-----0.187 lb/min
Rich/lean to lean/rich ratio---11.31:1
Shift delay-------4.53 sec
Trans temp------286*
Trans shaft input----22.6 RPM's
Trans sahft output---22.6 RPM's
Last edited by nikkev; 02-05-2005 at 08:22 PM.
#15
TECH Fanatic
iTrader: (1)
also ing voltage. 4.7 and 18, Atap is definately having a communication problem. Also, if you are failing emissions due to missfires and have a cam the motor will naturally missfire more, a stall will cause the pcm to report false misfires due to the converter weighing less than stock. Its best to raise your misfire tables to a min count 2000, it should pass emissions by doing so.
Last edited by SmokingWS6; 02-06-2005 at 02:28 PM.
#16
10 Second Club
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Originally Posted by nikkev
Could the custom tune be messing up the readings? Looks like I need to head to NC next weekend for another tune....
On a side note.....have you been getting gas on base? I had some really bad pinging with mine before going to Jackson. Ran the tank empty, threw in some injector cleaner and filled it back up. Runs great now. That's twice now it's ran like crap after getting gas on base.
Last edited by jay_99z; 02-06-2005 at 11:41 PM.
#17
Originally Posted by jay_99z
Kevin, I have Thurs and Fri off this week or Sat and Sun evening.....give me a call. Give me a call, I got a couple things to try on it.
On a side note.....have you been getting gas on base? I had some really bad pinging with mine before going to Jackson. Ran the tank empty, threw in some injector cleaner and filled it back up. Runs great now. That's twice now it's ran like crap after getting gas on base.
On a side note.....have you been getting gas on base? I had some really bad pinging with mine before going to Jackson. Ran the tank empty, threw in some injector cleaner and filled it back up. Runs great now. That's twice now it's ran like crap after getting gas on base.
#19
My car has been surging at idle but only in gear. I had assumed this was because of the misfires and the stall issue. I ran my AC for the first time in a while and the surging was not there.The surging ranges from 550 to about 900 RPM's. It doesn't do it in park/nuetral and it doesn't do it all the time.Maybe 90% of the time.It also doesn't do it when the AC is turned on. Could this be a vaccum issue?O2's maybe since the banks are reading so different?
#20
Well,I've already swapped the pushrods and none were bent. I also ran my car empty and put in 1/2 tank of circle K gas. I then drove to Rob's house and A-tapped the car. NO issues at all. Converter locked and unlocked like normal, and only 1 to 4 misfires the entire trip. I didn't have it scanning knock retard but I will do that in a little bit.....