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flashing CEL only in 6th gear at 38-3900 rpm

Old 02-18-2016, 03:35 PM
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flashing CEL only in 6th gear at 38-3900 rpm

It strikes me that this is a sensor issue rather than a misfire, but wanted to run it by others with more experience to make sure it makes sense.

04 6mt, 40k on reman, compression test within the last thousand miles.
I typically run at 77/78 on the highway, which puts me just under 4k rpm. Occasionally I get a flashing CEL without a noticeable stumble or change in note. If i drop down to 3k or shift it goes away. I cannot replicate it in any other gear, having tested 5th on the highway for 5-10 minutes at a time, and 3/4 on secondary roads when the urge strikes.

has anyone experienced a similar problem?
thanks
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Old 02-18-2016, 03:53 PM
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It's a misfire. Search.
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Old 02-18-2016, 08:37 PM
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A flashing CEL is pretty much always a misfire. When did you last replace your coils, wires, and plugs?
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Old 02-26-2016, 07:21 AM
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thanks for the replies.
I asked the question because I had not seen others with such a specific gear/rpm combination in the flashing cel threads. however I recently took it on a longer drive and got a flashing cel above 4500 rpm in third, so it seems to be garden variety misfire. I replaced the coils, wires and plugs last summer, so they have a couple of thousand miles. I will go through the suggestions in the other cel threads.
Got distracted from the problem with some recent snow, and I picked up an 89 saab 900 convertible yesterday, but it should be warm soon and I'll get it sorted in time to run some autox at pitt race.
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Old 03-02-2016, 11:16 PM
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Originally Posted by Squirrel chaser View Post
thanks for the replies.
I asked the question because I had not seen others with such a specific gear/rpm combination in the flashing cel threads. however I recently took it on a longer drive and got a flashing cel above 4500 rpm in third, so it seems to be garden variety misfire. I replaced the coils, wires and plugs last summer, so they have a couple of thousand miles. I will go through the suggestions in the other cel threads.
Got distracted from the problem with some recent snow, and I picked up an 89 saab 900 convertible yesterday, but it should be warm soon and I'll get it sorted in time to run some autox at pitt race.
I had stupid power loss at random RPMs that were intermittent. Sure enough it was the good ol ignition system to blame. Coils/plugs/wires. Make sure they are OEM at the very least for the coils.
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