camshaft position sensor, slow turnover (v8)

Hiya
A while back I replaced the camshaft position sensor.
I'd read that if the car was down on power but otherwise running fine, that replacing this could fix it.
Sure enough, I replaced it, and it got all its power back so I was well pleased.
Before doing it, and reading up, I think I came across a few lines somewhere that said the sensor was also responsible for the "fast start". Not sure if I misunderstand but did that refer to the time from ignition on to engine running?
The reason I ask is that it now takes 2 or 3 cranks before starting so slower than before.
It always starts 1st time, and in the same amount of time, but just slower.
It doesn't seem to affect anything else, but I'm sure I'll be down that way in the engine again sooner rather than later, so wondered if I've done something wrong, or can rectifier it?
Any insight would be greatly appreciated.
Regards
Matt

Low battery voltage/amps?

I don't own a V8 but the data on the Bosch ECM does say that an implausible CMP sensor signal will result in - "Quick crank/cam synchronisation on start-up feature disabled". Don't know if installing a new CMP sensor would clear this fault state automatically but I suggest you get an OBD readout first and proceed from there.

Thanks, NPG & Juke, the battery is pretty new, and the voltage seems fine.
Sorry, that was a really lazy post of me last night and I just did it when it was on my mind.
I have scanned the fault and it says
p1000 camshaft sensor fault/value
timing error drive cycle a
occurred 1 times
signal invalid
fault is currently present.
This fault cant be cleared, I do have po134, po155, and po135 which do clear and come back. Both the lambda's are pretty new, but I do have new ones to put in at some point but suspect those fault codes might be coming from elsewhere.
If it wasn't for the significant improvement in engine output when I replaced the sensor i'd think it was a duff sensor. But as I say, the engine had a lot more pull after installing.
Thanks in advance for your help.
Regards
Matt

mattni said:

p1000 camshaft sensor fault/value
timing error drive cycle a
occurred 1 times

Click to expand...

If the Bosch EMS behaves like other ECUs, P1000 simply means that the ECM is in monitoring mode and should clear out automatically once the vehicle is driven a number of times. This code does not have a user reset but if you want it to clear sooner, you will need to follow a number of specific drive cycles as predetermined by the manufacturer. While P1000 is enabled, the engine will not perform optimally because the ECM is in learning mode and gathering data from sensors and driver input. It normally appears once you either disconnect the battery or clear stored DTCs. My suggestion is to just use the vehicle for a few days and then run another OBD scan. If the code is still there, it usually means that the drive cycle was interrupted with another fault for which you should have a separate DTC.

thanks, NPG, its been that way for a few months.
think it must be coming from the other faults as you say which are all o2 sensor related.
I've read a bit about them, so will try to fix them 1st. I have a pair of new sensors. but one of the ones in situ has been spliced directly into the harness which I think will be a pain to replace. But I'll do them and see what's what.
Thanks again
Matt

Well, I did the sensors. And after non starting and finding a triggered inertia hidden where it shouldn't be got it back going. But 02 faults are back, plus the p1000. And a new pxxxx permanent voltage supply, signal to low.
So doesn't look like the sensors, although the old ones that came out were very sooty. Guess it was running rich due to the sensors not working.
Don't suppose anyone has any idea where to look next?
Thanks in advance
Matt