CEL: Engine stumbling stuttering and wanting to shut-off
#1
Racer
Thread Starter
CEL: Engine stumbling stuttering and wanting to shut-off
Well, I’ve just completed my 1,700 mile journey in my ’99 996 over the last few days. With only 10 miles to my destination I felt the engine stumble and stutter which was immediately followed by a flashing CEL and then a steady CEL. When this happened I quickly pulled the car over so I can inspect the engine. Nothing appeared wrong. No smoking. No leaking. Nothing.
I realize this was probably very unwise but since I was stuck on a two-lane canyon road, I decided to re-start the car and very very carefully drive/limp to my destination, which I did.
The car feels like it has a misfire and isn’t running on all cylinders. To keep the car from stalling and shutting off, I had to keep it in low gears and maintain roughly 3-4k rpms. Furthermore, the engine doesn’t seem to be responding to throttle inputs reliably. All instrumentation reads good, except for the CEL and engine behavior. Any ideas? Vacuum leak?
Thanks in advance.
Mike
I realize this was probably very unwise but since I was stuck on a two-lane canyon road, I decided to re-start the car and very very carefully drive/limp to my destination, which I did.
The car feels like it has a misfire and isn’t running on all cylinders. To keep the car from stalling and shutting off, I had to keep it in low gears and maintain roughly 3-4k rpms. Furthermore, the engine doesn’t seem to be responding to throttle inputs reliably. All instrumentation reads good, except for the CEL and engine behavior. Any ideas? Vacuum leak?
Thanks in advance.
Mike
#2
Racer
Thread Starter
Perhaps it is worth mentioning...the car was running fantastic 99% of the drive.
I was getting over 370 miles per tank (with a couple gallons left to spare) and 26+MPG.
Mike
I was getting over 370 miles per tank (with a couple gallons left to spare) and 26+MPG.
Mike
#7
Rennlist Member
Don't drive it until you get the codes read. You don't want to cause any unnecessary damage.
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#8
Racer
Thread Starter
I wasn't planning to and I'm not driving the car back to CA. It will be staying here in Washington. I'll be moving here next month (at least I'll have tools here soon, lol).
Mike
#10
I hope it's something simple like a coil or coil wire. And for the future, pick up a cheap Bluetooth or WiFi code reader and keep it in the car.
#11
Racer
Thread Starter
I have two code readers. One, is in my Mercedes. The other, in my tool box. And both, are in CA. I'll be putting the reader that's in the Merc, in the Porsche for now on.
Mike
#15
Racer
Thread Starter