Idle speed and coldstart issues on Edition 30..Terraclean to resolve..

[Saintsteve]

Did u get a look at what the plug was like on 4 compared to the others?

Darker or lighter?

Think it's time the intake manifold came off for injector swap.

Darker on cyl 4 lee. Yes does look like a faulty injector.Somethings up as the car doesnt appear to be making full power accoarding to the MAF readings i took today at full chat of around 220.8  
Whether a duff injector would cause power loss and show that air speed/mass would also suffer if one cylinder is not 100%?

[chungster]

That suggests spark plug / coil pack. Dark normally equates to running rich. My plug was clearly lighter than the other 3 hence it pointed to faulty injector and running lean!

But get it looked at by a pro is best way cos im a numpty lol

Ps. I changed all 4 plugs too at same time mind.

[scopes]

What ever it is, i hope you get it sorted soon matey 

[bacillus]

What ever it is, i hope you get it sorted soon matey 

+1

[Saintsteve]

Thinking about it, one plug was darker then the other, I just pulled plugs 1 and 4 out , can't remember which one was which, but a deffo imbalance.

Does anyone know, would the MAF reading be suffering if an injector isn't working properly? Or is that a different issue.

To be on stage 2 bluefin with a forge Twintake, seems abit low to me.?

[chungster]

220.8g/s on the MAF equates to around 276 bhp. So you're missing 25+ ponies!

Your turn to find them!!!

[Wild Bean]

220.8g/s on the MAF equates to around 276 bhp. So you're missing 25+ ponies!

Your turn to find them!!!

  touché

[Hedge]

220.8g/s on the MAF equates to around 276 bhp. So you're missing 25+ ponies!

Your turn to find them!!!

How do we know it's not been dyno'd for a long time?

That could be it.   

[Saintsteve]

220.8g/s on the MAF equates to around 276 bhp. So you're missing 25+ ponies!

Your turn to find them!!!

How do we know it's not been dyno'd for a long time?

That could be it.   

276bhp on 3 cylinders isn't too shabby in defence

No she hasn't been dyno's for a while.

[ROH ECHT]

Thinking about it, one plug was darker then the other, I just pulled plugs 1 and 4 out , can't remember which one was which, but a deffo imbalance.

Does anyone know, would the MAF reading be suffering if an injector isn't working properly? Or is that a different issue.

To be on stage 2 bluefin with a forge Twintake, seems abit low to me.?

No. The maf reading would not be affected. It only reports/suggests how well the maf sensor is reading. But since it reports/suggests, it leaves the ecu to make requests due to data reported by the maf. So with a failing maf - the ecu will cut back and these cuts will show in your requested fuel pressure and more.
My data below with a good maf sensor shows I'm good for 295whp, and I dyno @ 290whp.
Bad maf--Good maf

103.42   103.03 < 3k rpm
121.92   100.11
110.08   114.08
108.69   108.72
113.08   117.67
117.14   113.31
115.03   111.58
120.44   118.67
124.14   123.08
125.33   126.89
130.17   130.56 < 4k rpm
132.03   132.5
140.08   146.06
154.08   147.08
154.83   156.86
164.56   161.03
173.75   171.5
184.19   179.69
190.83   191.94
202.08   209.22 < 5k rpm
214.36   213.69
213.92   210.92
217.94   216.86
221.53   221.97
222.89   224.78
216.39   223.67
208.28   218.97
215.31   221.11
207.03   220.44
197.28   218.11
181.42   220.17
179.56   220.31 < 6k rpm
176.81   225.69
175.42   221.22
176.06   224.89
177.25   229.19
172.58   232.03
177.89   227.53
169.06   225.67
174.31   229.08
173.36   229.03
174.17   236.14
174.17   233.78
171.17   234.81 < 6800 rpm

[ROH ECHT]

Apologize for the earlier equation. We do whp here.

220.8 / 0.68 = 324hp

220.8 / 0.80 = 276whp

I don't know the ratio of hp to bhp if any...sorry ;p

Your maf seems close perhaps for your stage remap, yes?

Time to sort out whether the dark or light plug came from the #4 cylinder now.
If dark: you have misfire in #4 and it is a plug, coil, or poor valve seal in #4
If light: injector

[Saintsteve]

Going to take the plugs out this morning, I have a spare set of NGK iridiums, so will put these in from cold, and see if the car starts misfiring from cold again.

[ROH ECHT]

Fingers crossed here ;p

[Saintsteve]

Well found out the answer as to why my thoughts of 220.8 on the MAF were low, and that was because of an "amendment" to my remap back in may 2011, when I asked Superchips to "tweak" my remap, what they had actually done was put my car back to Stage 1 without telling me..

So means my car on current config with my Twintake installed exactly 1 year ago, means that my car has never had stage 2 !, in other words I've been running stage 1 for a very long time!

It now has stage 2 and now goes even better especially higher up the revs now.
Still have an injector on number 4 cyl that's misfiring a handful of times on tickover though,but not a biggy.
I also at the same time changed my spark plugs to a spare set of NGK iridiums I had to rule out a dodgy plug.

Gonna keep an eye out for a spare injector in the mean time.

[Saintsteve]

220.8g/s on the MAF equates to around 276 bhp. So you're missing 25+ ponies!

Your turn to find them!!!

How do we know it's not been dyno'd for a long time?

That could be it.   

found my missing ponies sat in Superchips database