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Scanmaster question.

WS6

WS6

Stay thirsty my friends
I installed my Scanamster 2.1 that I bought from fullthrottle and I have a question about it's function.

I'm seeing all parameters except the PL and SP,which are the injector pulse width and spark advance respectively.It scrolls from cc (crosscounts) right to ML (malfunction codes), skipping over those 2.
Is that right? or do I need to be in gear and under load to see those? The car is still up on jackstands, but I have run it in park for 15 minutes or so, or enough to go into closed loop.


:wall:
 
hmmmm I just looked at the manual for the scanmaster and it does list it as one of the displays but I'm like 99% positive mine doesn't show it either. But to be honest I don't think that it can actually read those parameters on our cars because I have never seen a scan tool that will read them for our cars. Now like DSMs and stuff their Scanmasters have a couple different parameters and from simple scantools I have seen for their cars I'm sure the pulsewidth and spark advance would probably be on theirs.
 
In order to show those the chip must have the fast update patch. Turbotweak can do it but you must order it.

In all honesty..I never have used those two. When you do the fast update patch you also get rid of the MAL screen.

Jason
 
Quiky One said:
In order to show those the chip must have the fast update patch. Turbotweak can do it but you must order it.
Click to expand...

Oooh, that appeals to me. I'd like to see the duty cycle of the injectors at the top end of any gear.

In all honesty..I never have used those two. When you do the fast update patch you also get rid of the MAL screen.
Click to expand...

I'd give up that function for duty cycle and spark advance.

AS AN ASIDE...:eam: How does a 17 year old know so much about automobiles?? Take that as a compliment!!! , because at 17 I was using 80% of my brain to get into some chick's pants and the other 20% trying to get beer to use to get into some other chick's pants??

:chat:
 
WS6 said:
Oooh, that appeals to me. I'd like to see the duty cycle of the injectors at the top end of any gear.



I'd give up that function for duty cycle and spark advance.

AS AN ASIDE...:eam: How does a 17 year old know so much about automobiles?? Take that as a compliment!!! , because at 17 I was using 80% of my brain to get into some chick's pants and the other 20% trying to get beer to use to get into some other chick's pants??

:chat:
Click to expand...
Pulse width is not duty cycle. PW is a combination of other variables. Mainly how much the chip is asking for fuel. Eric typed up a long explanation a few years ago.
 
WS6 said:
AS AN ASIDE...:eam: How does a 17 year old know so much about automobiles?? Take that as a compliment!!! , because at 17 I was using 80% of my brain to get into some chick's pants and the other 20% trying to get beer to use to get into some other chick's pants??

:chat:
Click to expand...
Doesn't take alcohol these days....:eam: :tvhappy:
 
Quiky One said:
Doesn't take alcohol these days....:eam: :tvhappy:
Click to expand...

It's that statement that keeps fathers of young daughters up at night.

Like me...:wheelchair:

Pulse width is not duty cycle. PW is a combination of other variables.
Click to expand...

Oh, I was thinking that PW could be roughly translated into duty cycle, or that PW was the ECM command and DC was the actual percentage of time that the injector was on.

I guess I need this explained to me.:confused:


...
 
WS6 said:
It's that statement that keeps fathers of young daughters up at night.

Like me...:wheelchair:
Click to expand...

:rofl: :rofl: :hump:

Sorry about that. The guys you need to watch out for the most are the ones who your daughter hangs out with as "friends"...never in a relationship.
 
WS6 said:
Oh, I was thinking that PW could be roughly translated into duty cycle, or that PW was the ECM command and DC was the actual percentage of time that the injector was on.

I guess I need this explained to me.:confused:...
Click to expand...
No...My PW reads way different then my DC is. Do you have the powerlogger software? If you do I will send a file to show there is no correlation.
 
Here look at this...
PL2.jpg


Pulsewidth is 15.17 and DC is 68.9%
 
Pulse width is the amount of time that the injector is open to allow for fuel. Duty cycle is an approximation of how much of the injectors capacity that you're using. Now the car can call for more than 100% of the duty cycle and then it's trying to call for more fuel than what can be provided. Ideally you should be maxing the injector at about 80% duty cycle, if you're commonly running higher than that you should upgrade them.

Basically you have the engine turning at a certain rpm, at 100% duty cycle the injector is open during one entire ignition cycle (2 rotations on a 4 stroke engine) so if you're at 3000 rpm that's the same as 50 rotation per second, or the inverse of that which is .020 seconds per rotation. Now since it's a 4 stroke engine you have to do 2 full revolutions for an ignition cycle so it's .040 seconds (40 ms) in a full ignition cycle. Hopefully that makes sense, if not post up and ask.

Take a look at this chart it applies to all motors http://www.ecanfix.com/~mdhamilton/dutycycle1.html
 
Sounds like you need a powerlogger/laptop in addtion to your scanmaster. Use the Scanmaster to keep an eye on knock and 02s on the fly.
Then check out your log when you can sit back and look at the stuff after you run. IMO. I want a powerlogger, but I need a PC based laptop first...MAC:angry:
 
sverble said:
Sounds like you need a powerlogger/laptop in addtion to your scanmaster. Use the Scanmaster to keep an eye on knock and 02s on the fly.
Then check out your log when you can sit back and look at the stuff after you run. IMO. I want a powerlogger, but I need a PC based laptop first...MAC:angry:
Click to expand...
There are lots of cheap laptops at Bestbuy for under $500. Then you can have a beater laptop for trips too.

$500 is a lot less than a new motor. Thats my philospohy.
 
sverble said:
Sounds like you need a powerlogger/laptop in addtion to your scanmaster. Use the Scanmaster to keep an eye on knock and 02s on the fly.
Then check out your log when you can sit back and look at the stuff after you run. IMO. I want a powerlogger, but I need a PC based laptop first...MAC:angry:
Click to expand...

Yes, I agree, but I'll be spending cabbage on other things first.
 
In addition to the laptop you gotta get the powerlogger itself, which is around $270. I've found some good prices on laptops on e-bay, some for about $200-$250. They don't have to be great, I don't think that software is as demanding as say CS3/flash or a video editing program. E-bay has junk too though.
 
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