IGNITION RANGE 1 AND 2

[SIIX TT]

search facility is down

How do I work out the data for ignition range 1 and ignition range 2.

Just bought a Durametric and trying to fathom things out.

Also has anyone had fault code P0050 and P0155. Showing as Oxygen sensor heater cat conv bank 2.
I have reset it and its thrown it again straight away but Im not sure what I need to replace.
Is it just a sensor or something else.

Regards
J

Edited by SIIX TT on Monday 18th October 18:14

[bobsan]

Over rev ÷ 3 = RPM over limit ÷ by rpm at time
(the 3 represents one half of the cylinders)

Example: 1810 over revs is:
1810 ÷ 3 = 600 rpm ÷ 8000 = 0.075 of a minute

Example: 1441 over revs is:
1441 ÷ 3 = 480 rpm ÷ 8000 = 0.060 of a minute

hope you don't show any range 2 over revs
range 1 are fine, just means you've hit the limiter occasionally

the O2 fail heater is no biggie, its the pre heater in the sensor, bring's it up to working temp before the zorst does so you'll be running a little rich for couple of mins longer. but yes you would need to replace sensor, best done in pairs

Edited by bobsan on Monday 18th October 18:31

Edited by bobsan on Monday 18th October 18:33

[Phooey]

bobsan said:

hope you don't show any range 2 over revs

What would cause a range 2 over-rev? I was under the impression that 1-3 over-revs are fine, 4,5 and 6 are not. This is what an OPC told me anyway, so would like to hear more about these over-revs, and a definitive guide to them. If there is one.

Sorry to hijack the thread

[DiscoColin]

Phooey said:

bobsan said:

hope you don't show any range 2 over revs

What would cause a range 2 over-rev? I was under the impression that 1-3 over-revs are fine, 4,5 and 6 are not. This is what an OPC told me anyway, so would like to hear more about these over-revs, and a definitive guide to them. If there is one.

Sorry to hijack the thread

Shiny new 997s have more ranges. On the ilk of the 996 there are only 2 - range 1 is when you hit the limiter and range 2 when the engine is turned over it (such as with a missed downshift).

[SIIX TT]

I think it depends on the car- 996 only shows range 1 and 2 whereas some later cars show a range from 1 to 6 ..... I think.

What do range 2 mean - Im guessing you could hit range 2 if you went from 6th to 2nd in error and for a split second the engine was subjected to horrific consequences?

Edited by SIIX TT on Monday 18th October 18:52

[Phooey]

DiscoColin said:

Phooey said:

bobsan said:

hope you don't show any range 2 over revs

What would cause a range 2 over-rev? I was under the impression that 1-3 over-revs are fine, 4,5 and 6 are not. This is what an OPC told me anyway, so would like to hear more about these over-revs, and a definitive guide to them. If there is one.

Sorry to hijack the thread

Shiny new 997s have more ranges. On the ilk of the 996 there are only 2 - range 1 is when you hit the limiter and range 2 when the engine is turned over it (such as with a missed downshift).

Ah, thanks Colin - this is where i get confused then. So does the 1-6 range apply to the Metzger engines in the 997 range, but not in the 996? Did Porsche just re-develop the ecu software in the newer 911's to give a more detailed/accurate diagnosis of an over-rev, rather than the traditional 1-2?

...and, do all current Porsche's whether Metzger/DFI e.t.c. use the same 1-6 guide?

[Henry-F]

bobsan said:

Over rev ÷ 3 = RPM over limit ÷ by rpm at time
(the 3 represents one half of the cylinders)

Example: 1810 over revs is:
1810 ÷ 3 = 600 rpm ÷ 8000 = 0.075 of a minute

Example: 1441 over revs is:
1441 ÷ 3 = 480 rpm ÷ 8000 = 0.060 of a minute

A slightly easier way of seeing it is to imagine the rev limit is 8000rpm (probably a little bit less but not to worry). With 3 ignitions per revolution that's 24,000 ignitions per minute or 400 per second. So 1800 revs would represent around 4 seconds of over rev. The figure is cumulative so each time you over rev it adds to the total and then tells you the last time it went into that rev range, (certainly our system tester does I'm not sure about yours).

I hope that helps.

Henry

[SIIX TT]

How do you know what the over rev is? As I understand it range 2 shows the number of times the car has gone beyond the rev limiter?? but by how much?

If you get the car mapped and the limit is reset will this show as a range 2??

Can you work out bu how much it exceeded the limit?

[Phooey]

Although this is regarding a 996 C4S, it may be worth a read? - http://forums.rennlist.com/rennforums/996-forum/40...

[SIIX TT]

Interesting stuff... in real terms does it mean a a great deal though. Mine does show range 2 but the number equates to milliseconds if my maths is ok. The car has 60k miles on and runs fine - bar the apparent fault on the oxygen sensor heater and an PSM/ABS fault which I now think is the wiring loom to the front offside wheel sensor.

Also- can I use the durametric with then engine running to measure real time values. The booklet isnt clear on that one?

[Richard Hamilton]

Boxster 986
RANGE 1, 7200-7800
RANGE 2, 7800 and over

996
RANGE 1, 7300-7900
RANGE 2, 7900 and over

996T
RANGE 1, 6750-7250
RANGE 2, 7250 and over

996 GT3
RANGE 1, 8200-8800
RANGE 2, 8800 and over

Carrera GT
RANGE 1, 8400-9000
RANGE 2, 9000 and over

987 Boxster
RANGE 1, 7200-7500
RANGE 2, 7500-7700
RANGE 3, 7700-7900
RANGE 4, 7900-8400
RANGE 5, 8400-9500
RANGE 6, 9500 and over

997 Carrera
RANGE 1, 7300-7500
RANGE 2, 7500-7700
RANGE 3, 7700-7900
RANGE 4, 7900-8400
RANGE 5, 8400-9500
RANGE 6, 9500 and over

997 GT3
RANGE 1, 9000-9200
RANGE 2, 9200-9400
RANGE 3, 9400-9600
RANGE 4, 9600-10000
RANGE 5, 10000-11000
RANGE 6, 11000 and over

997T
RANGE 1, 6800-7000
RANGE 2, 7000-7200
RANGE 3, 7200-7400
RANGE 4, 7400-7900
RANGE 5, 7900-9000
RANGE 6, 9000 and over

[Phooey]

Richard Hamilton said:

... some good info

[Mr Freefall]

SIIX TT said:

Also- can I use the durametric with then engine running to measure real time values. The booklet isnt clear on that one?

Yes you can, what do you want to measure?

You have to start and stop the recording of actual values, so best have a passenger to do this for you.

Mr F

[anniesdad]

For the 996 GT3, is Ignition range 1 not at the limit (8K for Mk1, 8.2K for Mk2), so 8.8K would be an over rev ie. Range 2?

[SIIX TT]

Re what I want to read...

The PSM/ABS fault is proving to be a real pain to pin down. Im now quite convinced that its the wiring to the right front wheel sensor. Can I use any readings to try to firm up if thats the case.
I have replaced the MAF twice and the wheel sensor and its still throwing the same fault.

[Mr Freefall]

SIIX TT said:

Re what I want to read...

The PSM/ABS fault is proving to be a real pain to pin down. Im now quite convinced that its the wiring to the right front wheel sensor. Can I use any readings to try to firm up if thats the case.
I have replaced the MAF twice and the wheel sensor and its still throwing the same fault.

If you look on the Actual tab, you will see all the actual values you can record. Sorry not much help there.

You can read the 02 sensor values, this will tell you if the MAF is giving some poor data and at what rev range, and if the car is under load etc. If the data proves to be a big spike at any point then you will see this in the Lambda value.

Is your car mapped?

Mr F

[SIIX TT]

Not that I know of. It has a RUF exhaust but thats it as far as Im aware.

[Mr Freefall]

SIIX TT said:

Not that I know of. It has a RUF exhaust but thats it as far as Im aware.

Ok, std map. Hmm Ruf zorst, what cats 200 or 100. If you have 100 cell then more than likely you will have a different Map too to stop the engine check light coming on.

Sometimes, and yes I know its extreme, if a boost hose pops off then you will get the same fault codes as your getting. So I wondered if you are getting a boost spike, or boost drop, that sends incorrect data to the MAF, then the MAF throws up the codes.

Not that your MAF is faulty, just there is problem.

Just a thought, you would be able to check the boost on a a drive on 100% throttle and see if all the data is ok. If you have progressional boost, then you could rule this out.

But if you have a std map, and hoses are all OK, then this really should not be a problem either.

Its just a thought, you have the durametric, so you could test this.

Parameters:-

Rpm,
Engine load - look for big drops or spikes
Ignition angle(make sure there is nothing wrong with the map)
Oxygen sens bank 1 or bank 2 (check your o2 sensor, should be about 0.8 lamba)
Boost pressure of sensor. (check your boost)
MAF (check the MAF
Throttle position (make sure max throttle).

Find some road, 3rd gear is used by most of the tuners, watch out for plod!!!! run from 2000 - 7000rmp.

This is typically used for checking the Air Fuel ratio from tuners when they have mapped cars.

Mr F

[SIIX TT]

Thanks Ill get some data and maybe upload it so more informed people than me can have a look.
Its heavy rain / borderline sleet here though, so maybe not today

[SIIX TT]

Managed to do some second gear runs - couldnt risk 7000rpm in 3rd.... how fast is that?
I have no idea what they mean though. The MAF readings seem to suggest its working as they go up with RPM. Beyond that I have no idea what ive measured.....

anyone can help?