misfires in 3 cylinders (4,5,6)
#31
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Rombo60, Thanks for the reply. I saw your post last week as I was searching, but it just got lost in the sea of other possible culprits. I will give it a shot. If it turns out to be the fix, there's a case of beer coming at ya! These forums are a lifesaver for a guy like me. I can afford to buy the dreamcar, but can't afford to flatbed it to the dealor every time something goes wrong.
#32
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It's a pretty strait forward job. Once you have access to the spark plug coils, you're there. The variocam actuators are right next to them.
The bummer is that he got a code for a bad actuator on bank 2 right after he plugged in his fancy PIWIS. But my cheap OBD2 only showed the generic codes for the misfires and nothing else. In this case, having a better diagnostic tool would have saved me from bringing it into a shop. On the plus side, he found an intake air leak that I had caused when I removed the intake plenum while troubleshooting. I didn't have one of the plenum clamps back on correctly. Who knows if I ever would have found that if I had done the actuators myself.
#33
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Now, my '07 2.7 w/ 81k miles is doing all this. I've only had it a month, and replaced O2 downstreams on both banks iaw P0431, only got worse...
VVS Vanos, Variocam solenoid, Valve lifter solenoid all mentioned here; are they the same thing, that 9A1... part#?
Now get P0305, P0303, and P0300, and got blinking CEL as I got home and shut her down.
Gonna check plugs and coils even tho posters say it is rarely that;
Should I replace the 9A1... sensors, or punt and tow to the busy indie, missing Xmas at Mom's?
Thanks for any input! Otherwise I love this Cayman...
VVS Vanos, Variocam solenoid, Valve lifter solenoid all mentioned here; are they the same thing, that 9A1... part#?
Now get P0305, P0303, and P0300, and got blinking CEL as I got home and shut her down.
Gonna check plugs and coils even tho posters say it is rarely that;
Should I replace the 9A1... sensors, or punt and tow to the busy indie, missing Xmas at Mom's?
Thanks for any input! Otherwise I love this Cayman...
#34
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Now, my '07 2.7 w/ 81k miles is doing all this. I've only had it a month, and replaced O2 downstreams on both banks iaw P0431, only got worse...
VVS Vanos, Variocam solenoid, Valve lifter solenoid all mentioned here; are they the same thing, that 9A1... part#?
Now get P0305, P0303, and P0300, and got blinking CEL as I got home and shut her down.
Gonna check plugs and coils even tho posters say it is rarely that;
Should I replace the 9A1... sensors, or punt and tow to the busy indie, missing Xmas at Mom's?
Thanks for any input! Otherwise I love this Cayman...
VVS Vanos, Variocam solenoid, Valve lifter solenoid all mentioned here; are they the same thing, that 9A1... part#?
Now get P0305, P0303, and P0300, and got blinking CEL as I got home and shut her down.
Gonna check plugs and coils even tho posters say it is rarely that;
Should I replace the 9A1... sensors, or punt and tow to the busy indie, missing Xmas at Mom's?
Thanks for any input! Otherwise I love this Cayman...
I took the intake with the MAF and the two across the engine top off, and there is no oil contamination there, nor cracks. Applied CRC MAF cleaner to the MAF. I could not spot any obvious vacuum leaks, but did not run the engine. I have done all I can do that I am aware off without test eqpt except pull a plug and coil, so that is next but I doubt that will solve the issue. Plug wires are shiny blue new looking and the assy belt looks fresh, so this lil' pup has had some maintenance. The AOS was dusty but seems intact. Air filter was filthy but not the worst I've seen. Am I correct in that the fuel filter is in the tank?
Only parts I've replaced so far are the back O2s. Last time I drove the car Friday after installing the O2, the CEL blinked as I got home, so i hope I am safe to disconnect the MAF wire and see if it runs better then, unless y'all think that is unwise.
Again, VVS Vanos, Variocam solenoid, Valve lifter solenoid all mentioned here; are they the same thing, that 9A1... part#?
Looks like 'over the river and through the woods to Grandmother's house' ain't happening in the 987 this year, but at least the local indy is well- regarded here in So. MD. Any tips you think of are welcomed, of course, and thanks.
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#37
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Did you resolve it yet? I would be very surprised if it wasn't the variocam solenoid for that bank. I had exactly the same symptoms and that's what it turned out to be, after I replaced or checked everything else. $150 part and pretty easy to get to.
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Spike Speakus (10-24-2022)
#38
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I thought like you did, but I have misfires on both banks but not a complete bank with P0305 and P0303, as well as P0300 overall.
Pulled the old coils and all 6 had cracks, while the plugs had decent color but worn out electrodes. If this tuneup does not work, will move on to variocam solenoids, or punt and take it to the local Indy...
#40
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06 Cayman S...pulling my hair out! 67k miles, manual. Tubi exhaust. Owned it a few months.
CEL will show up ONLY on a cold start (sitting in the garage overnight) full warm up scenario. Car starts, high idle, kicks down, then kicks down again to the final low idle. It's on that last kick down to the lowest idle it throws the code...always #6 misfire. Idle gets rough, runs blubbery. Shut car off or clear code, runs perfect all day, no CEL. When monitoring Actual Values on the Durametric, driving the car, the "ignition counter misfire detection" value will show a constant stream of misfires BUT nothing logs in the individual cylinder values. Strangely the misfires rack up at idle and acceleration, but stop instantly on deceleration! (those are just notes as I try to understand what I'm seeing on the Durametric).
So far I've addressed the following....new coils & plugs, new injector in #6, new air filter (it was filthy), AOS done a while back as precaution. New battery. Checked all connections. I run 93 and recently adding Techron.
Since it's not doing this on the whole bank, could it still be a variocam issue? It is definitely related to something happening at on that idle cycle.
PS...something I just remembered, early on when I got the car I was messing with the Durametric, monitoring camshaft deviation, etc. messing around, both deviations in spec., both banks showed deviation values. I just checked it and the one of the banks is now showing 0.00 deviation value, when it definitely showed a normal value before (other bank shows a normal value)!
CEL will show up ONLY on a cold start (sitting in the garage overnight) full warm up scenario. Car starts, high idle, kicks down, then kicks down again to the final low idle. It's on that last kick down to the lowest idle it throws the code...always #6 misfire. Idle gets rough, runs blubbery. Shut car off or clear code, runs perfect all day, no CEL. When monitoring Actual Values on the Durametric, driving the car, the "ignition counter misfire detection" value will show a constant stream of misfires BUT nothing logs in the individual cylinder values. Strangely the misfires rack up at idle and acceleration, but stop instantly on deceleration! (those are just notes as I try to understand what I'm seeing on the Durametric).
So far I've addressed the following....new coils & plugs, new injector in #6, new air filter (it was filthy), AOS done a while back as precaution. New battery. Checked all connections. I run 93 and recently adding Techron.
Since it's not doing this on the whole bank, could it still be a variocam issue? It is definitely related to something happening at on that idle cycle.
PS...something I just remembered, early on when I got the car I was messing with the Durametric, monitoring camshaft deviation, etc. messing around, both deviations in spec., both banks showed deviation values. I just checked it and the one of the banks is now showing 0.00 deviation value, when it definitely showed a normal value before (other bank shows a normal value)!
Last edited by wheeler; 02-17-2016 at 10:40 AM.
#41
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[QUOTE=wheeler;13024711]06 Cayman S...pulling my hair out! 67k miles, manual. Tubi exhaust. Owned it a few months.
CEL will show up ONLY on a cold start (sitting in the garage overnight) full warm up scenario. Car starts, high idle, kicks down, then kicks down again to the final low idle. It's on that last kick down to the lowest idle it throws the code...always #6 misfire. Idle gets rough, runs blubbery.
Don't mean to be alarmist here but when peeps talk about problems w #6 I start to get nervous. While I'm not sure how to explain an intermittent issue in that cylinder, if after you have exhausted all the normal fixes you still have a problem you could consider scoping cylinder or doing a leak down to make sure its ok. I'd worry more if you were reporting smoking or hear a ticking from that side. Probably just me being paranoid
CEL will show up ONLY on a cold start (sitting in the garage overnight) full warm up scenario. Car starts, high idle, kicks down, then kicks down again to the final low idle. It's on that last kick down to the lowest idle it throws the code...always #6 misfire. Idle gets rough, runs blubbery.
Don't mean to be alarmist here but when peeps talk about problems w #6 I start to get nervous. While I'm not sure how to explain an intermittent issue in that cylinder, if after you have exhausted all the normal fixes you still have a problem you could consider scoping cylinder or doing a leak down to make sure its ok. I'd worry more if you were reporting smoking or hear a ticking from that side. Probably just me being paranoid
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#42
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[QUOTE=gpjli2;13025547]
No...I hear you! It's a real concern, but definitely not smoking or doing anything else weird.
06 Cayman S...pulling my hair out! 67k miles, manual. Tubi exhaust. Owned it a few months.
CEL will show up ONLY on a cold start (sitting in the garage overnight) full warm up scenario. Car starts, high idle, kicks down, then kicks down again to the final low idle. It's on that last kick down to the lowest idle it throws the code...always #6 misfire. Idle gets rough, runs blubbery.
Don't mean to be alarmist here but when peeps talk about problems w #6 I start to get nervous. While I'm not sure how to explain an intermittent issue in that cylinder, if after you have exhausted all the normal fixes you still have a problem you could consider scoping cylinder or doing a leak down to make sure its ok. I'd worry more if you were reporting smoking or hear a ticking from that side. Probably just me being paranoid![Wink](https://rennlist.com/forums/images/smilies/wink.gif)
CEL will show up ONLY on a cold start (sitting in the garage overnight) full warm up scenario. Car starts, high idle, kicks down, then kicks down again to the final low idle. It's on that last kick down to the lowest idle it throws the code...always #6 misfire. Idle gets rough, runs blubbery.
Don't mean to be alarmist here but when peeps talk about problems w #6 I start to get nervous. While I'm not sure how to explain an intermittent issue in that cylinder, if after you have exhausted all the normal fixes you still have a problem you could consider scoping cylinder or doing a leak down to make sure its ok. I'd worry more if you were reporting smoking or hear a ticking from that side. Probably just me being paranoid
![Wink](https://rennlist.com/forums/images/smilies/wink.gif)
#44
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Well...ya. I'm not sure you could hook up a brand new Porsche and not see some value in that box?? The fact it had a value and fluctuated a little as you drove, car warmed etc, normal...and now it's just ZERO? Seems like maybe it's not "sending" info now all of the sudden.
#45
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So, mine just started having CEL and misfires on cyl 4, 5 and 6.
For a couple of months i noticed that the engine almost chokes when coming off of high idle but clears up in a second or two and runs fine. Yesterday threw a CEL when coming off the high idle and running rough.
Scheduled a dealer visit for Thursday. lucky to have warranty till Nov.
A year ago/8k miles i got all new plugs and new coils. the car is DD, so we'll see.
For a couple of months i noticed that the engine almost chokes when coming off of high idle but clears up in a second or two and runs fine. Yesterday threw a CEL when coming off the high idle and running rough.
Scheduled a dealer visit for Thursday. lucky to have warranty till Nov.
A year ago/8k miles i got all new plugs and new coils. the car is DD, so we'll see.