Misfire all cyl after DE
#76
Nordschleife Master
Once the O2 sensors go into Closed loop,the computer adjusts the mixture to keep the O2s " happy " switching between 0 to 1 V in most cars.
If your LT fuel trim starts at -7.8 which meant pulling fuel away,the computer will start adding fuel to keep the O2s happy,so your ST fuel trim will go positive for balance.
When you raise the RPM the injectors will squirt more fuel so the computer will intervene to keep the balance.
Again,all these numbers seem normal to me. Looks like the mixture is good where it is...
We need to start looking elsewhere...
#78
Nordschleife Master
#79
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DV's can be tested. Use a Mity Vac > connect to the top fittings and pull vacuum... It should hold 28 inches.. If it doesn't you have failed DV's and/or ones that need to be rebuilt/cleaned.
#80
Rennlist Member
Thread Starter
few runs today
I made a few more datalogs in 6th gear this afternoon. one with the MAF connected one without. It felt like it rumbled more without the MAF than with it connected. I also was going up a slight grade so that could be it.
#81
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wish I would have bought the mity vac instead of the vacuum gauge I bought last week.
#82
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Thread Starter
I was reading about the cam solenoid bracket like crazy last night on here and 6-speed. it sounds "common" and the error was misfires on one bank.
I am kicking myself for not looking at it better when I had it apart. I am going to check vacuum tonight if I get a chance to see how it responds when I hit the throttle.
I am kicking myself for not looking at it better when I had it apart. I am going to check vacuum tonight if I get a chance to see how it responds when I hit the throttle.
#83
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Thread Starter
broken bracket on Bank 1 where I was getting the misfires. the oil only came out because I removed it briefly. I need to order a new bracket before removing this one.
#84
Nordschleife Master
#85
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Thread Starter
Thanks for everyone's help, I learned more about my car in the last few weeks and feel good finding a common problem on the "outside" of the engine!
#87
RL Community Team
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