Thanks & Help...

[ianf]

First of all "Thanks" for all the help so far, I would be lost without this Forum and a lot poorer...

Ive had trouble of late with my 99 V6 VS ute not wanting to start but instead it would just turn over, NRMA told me it was the fuel pump but now I'm not so sure?, I did the code check today and came up with 46 & something about the crank signal?, Anyway it started and away I went but not long into this trip it started to run really rough and seemed to be choofing at idle and when I took off but I did notice the faster I went the less it became evident, I got home however and found I had a leak on the water valve for the heater & it was pretty hot, on trying to tighten this one of the stem on the water valve broke so I have to get a new one tomorrow but would this have anything to do with the car running so rough?, like the timing or something is out?, or could it be the fuel pump like I was first told?. I can't really afford to go replacing everything and as well as this the motor has done 325,000 and this is another reason I don't want to waste to much money, Any help or ideas would be greatly appreciated

[seq4x4]

I doubt the water leak would cause that sort of this.
DTC 46:
NO REFERENCE PULSES WHILE CRANKING

This DTC is intended to help in diagnosing a no-start condition. Any time the distributor is turning, the ignition module should generate the crankshaft reference pulses that the PCM should be receiving. Fuel injection pulses are "timed" from the crankshaft pulses, and without them no injection pulses will occur. The PCM can determine when these crankshaft pulses should be present, but aren't.
As with any engine while being cranked, there is a small amount of inlet manifold vacuum. Also while cranking, the battery voltage will be less than 11 volts. If the PCM's MAF sensor input detects manifold vacuum and the ignition voltage input detects less than 11 volts and there are no distributor reference input pulses, a DTC 46 will set.

NOTE: It is possible for the ignition system to provide spark, yet there may not be any distributor reference pulses at the PCM.
DTC 46 will set if all the following conditions are present for more than 2 seconds:
Voltage at PCM ignition voltage input terminal "A4" is below 1 volts, and
MAF sensor input is above 2048 Hz, and
No distributor reference input pulses at PCM terminal "D12".

Check your error codes again to doubt check whats going on. The click the link in my sig to find out what it could be.

[mrv8]

I had a VN at work last week, same issues, same code,turned out it was a faulty Crank angle sensor. But when it wouldn't start there was no spark or injector pulse.

[Westie]

Id definately be looking at crank angle sensor.
Fuel pumps "can" stuff up if you run them dry. but id be leaning towards to crank