P1117 - can't clear code

[blue62]

Originally Posted by Zzorro

Thanks Blue62 for the feedback and willingness to help out. To answer your questions:
1: fuel filter was changed with the fuel pump (approx 2000 kms ago) Sorry, forgot to mention

2: the air filter is a k&n unit that came with the car. I cleaned it and made sure it's not over-oiled. I suspect the PO over-oiled it, which may be why the MAF went bad. Anyways, I plan on swapping that out for an OEM paper filter one of these days

3: 10-4 on fuel pressure test. Have looked up the procedure and will get to it eventually.

4: it's throttle by wire. Mine is a 98. There is a sensor for throttle angle. I should note that when I did the MAF I took the air intake piping apart and cleaned it all based on advice found here. There was def some oil build-up in and around the throttle body. AOS and maybe air filter over-oiled etc. Anyways. That got cleaned

5: yes, around the same RPM range is when is starts bogging. Above 3000 I would guess. Car revs up great, then on the way up starts stumbling and sputtering and complete loss of power. I pass the gas and it just bogs down and feels like it's gonna stall, but doesn't. Maybe it's ignition related? Or fuel supply problem.

6: I'll have to look up durametric logging. I know it's on there and easy enough to figure out. The issue for me is logging while the issue occurs. It happens so infrequently that it's always a surprise :-).

Speaking of electrical gremlins: my CLU is messed up. I got all kinds of them (windows don't roll down, but do the drop, FOB and alarm don't work etc.). I will get to fixing it eventually. But the car has always started and run etc. Considering the frequency of occurrence maybe the engine and CLU do a self diagnosis every so many KMs and because the cLU is messed up it forces the car to stop providing fuel or something (thinking the car is stolen?). Sounds far fetched to me, but maybe?

I wonder if a solenoid on one bank or the other is not kicking the Variocam system in when your lose of power issues occurs???? Just a thought.

[Zzorro]

Originally Posted by blue62

I wonder if a solenoid on one bank or the other is not kicking the Variocam system in when your lose of power issues occurs???? Just a thought.

Researching now. I'll hook up durametric and snoop around a bit. See if I get consist actuation and look at the deviations etc. But it does look like others have reported similar symptoms with variocam.

[Zzorro]

Finally got around to hooking up the durametric.
I am able to activate both banks variocam solenoids and I get a def change in engine behavior when I do at idle. So theoretically these actuators are working properly.

My stumbling issue could be related to inconsistent operation of one or both of these actuators maybe? Will keep an eye on it.

On another note, my crank deviation position reads 0 degrees. Not sure if that's normal or not. Assumed I would see some deviation considering the age of the car.

[blue62]

Originally Posted by Zzorro

Finally got around to hooking up the durametric.
I am able to activate both banks variocam solenoids and I get a def change in engine behavior when I do at idle. So theoretically these actuators are working properly.

My stumbling issue could be related to inconsistent operation of one or both of these actuators maybe? Will keep an eye on it.

On another note, my crank deviation position reads 0 degrees. Not sure if that's normal or not. Assumed I would see some deviation considering the age of the car.

I assume you mean camshaft deviation.
0 camshaft deviation does sound unusual.
Take the car for a 20-30 minute drive then take the reading.
What ever reading you get it should stay steady no matter the RPM.

[Zzorro]

You are correct. Camshaft deviation is what I meant. After a 1/2hr drive I plugged in the durametric and got 1.0 degrees. So in spec.

But still got that stumbling. No codes or CEL. While rolling, I shut off the ignition and restart and it seems to go away. Very strange.

[blue62]

Originally Posted by Zzorro

You are correct. Camshaft deviation is what I meant. After a 1/2hr drive I plugged in the durametric and got 1.0 degrees. So in spec.

But still got that stumbling. No codes or CEL. While rolling, I shut off the ignition and restart and it seems to go away. Very strange.

Interesting that you get 1.0 degrees of deviation on it with the mileage you have.
I wonder if the electrical gremlins your having with the CLU are also manifesting in other areas? Such as the stumbling.

[Zzorro]

Yep. Possibly.
I have an invoice from PO that shows an engine replacement 100k kms ago. So while I have 176k kms on the dial, my motor may be younger.