172 Rolling Road Results - Help please!

[capturedbyjames]

Afternoon all,

Just had the 172 on a RR. And these are the results:

Sorry about the crap pics! Don't have a scanner!

Obvioulsy i'm quite disappointed with these, but I think I know the reason. The AA were there, so i asked the guy to run a diagnostics on it. Came up with the following.

P0141 - o2 sensor heater circuit (bank 1 sensor 2)

P0326 - Knock sensor 1 circuit (bank 1 on single sensor)

I'm hoping you guys can shed some light on what the hell that means?

Cheers,

James.

 

[DH_GTI]

thats not good, what have you got done to your car !!! does the car feel right ??

 

[JR]

superfastdans old car i think ?

 

[RSTuning]

Thats a nasty dip in torque right where it gets a little richer. Don't forget the dyno dynamics are also classed as "ego buster" so maybe not too much to worry about.

If the knock sensor is faulty that does need attention as it won't be adjusting advance if there is any det.

Paul

 

[RSTuning]

OOps!!!! Look at the intake temp
That graph is worthless
Ambient and Intake need to be within 10 degrees or the result can be seriously affected

 

[RSTuning]

It should look more like this on the bottom:
http://rstuning.co.uk/197graph.jpg

 

[capturedbyjames]

Ah right, I was concerned about there lack of a fan on the at the front! Gives no affect!

So basically it's just sucking in all the hot air, and doing sweet fa else!

The errors have cleared now, well, the service light has gone out, I presume this means they have gone?

Cheers Paul, some useful info there!

 

[RSTuning]

The service light comes on to indicate an ABS fault as the front wheels are turning and the rears are not

That clears as soon as you go over 15mph

Having no fan is not ideal as the car will get very hot. Not a massive issue on one power run but certainly not good

 

[capturedbyjames]

Hmm, my car was on there for about 45 mins, 4 runs, and just sitting idle for the rest!
That's why it was so warm then - Damn K&N... Must enclose that thing somehow!

 

[capturedbyjames]

Any idea on the errors:

P0141 - o2 sensor heater circuit (bank 1 sensor 2)

P0326 - Knock sensor 1 circuit (bank 1 on single sensor)

They will still be there then, causing issues no doubt?

 

[BenR]

No moving air for 45 mins, high temps, stressing your cooling system.....bit poo.

Your AFR, if correct is massively rich.

As for the faults, the lambda might need replacing, and the knock sensor might be because your intake temps were too high and you had a slight issue with knocking or det during a power run. But its just so damn rich.

 

[RSTuning]

The AFR is only correct on the bottom graph and is too rich above 4500, this will probably be robbing some power.

Paul

 

[capturedbyjames]

Ben,

I'd asume this is something your remap would sort?

Cheers for the help on all this, was quite disappointed when the results came up!

 

[murcod]

Just a point on the max power at the wheels- using .746 as a conversion factor to get hp to kW you end up with 94.7kW @ the wheels.

That's very close to what the Aussie 172's get on Dyno Dynamics dynos over here. So you may have some issues with your engine, but it's not much different to what a bog stock 172 would get here.

 

[GordonD]

Just a point on the max power at the wheels- using .746 as a conversion factor to get hp to kW you end up with 94.7kW @ the wheels.

That's very close to what the Aussie 172's get on Dyno Dynamics dynos over here. So you may have some issues with your engine, but it's not much different to what a bog stock 172 would get here.

I was going to say that.

That's more to my local Dyno Dynamics said my 172 produced. I then when down the road to the drag track and did a 15.0 on the first run without even trying to figure out how to launch right or change at the right revs, showing there's nothing wrong with the engine in the power department.

Dyno Dynamics dynos are supposed to guaranteed to all give consistent readings to each other. But they certainly don't give anywhere near the same readings as other dynos.

 

[stan*]

Dyno Dynamics dynos are supposed to guaranteed to all give consistent readings to each other. But they certainly don't give anywhere near the same readings as other dynos.

Thats largely down to strapping techniques.

 

[capturedbyjames]

Well, i'll get some of Bens work done, then get it retested.

Would like to rid those errors though!