[Kelvin1000]

Hey Shiv,

Any progress on the coldstart misfire issues? How is the feedback so far???

Thanks

[dzenno]

Originally Posted by Kelvin1000

I am runing 30%. How about you guys with DPs?

30% does it for me as well. I have a misfire issue at the moment as well but looks like its a bad coil. I'm getting it replaced on Wednesday morning, let you know...I don't have the same issue (cold start misfire), mine happens when I WOT starting in low RPM by the time I hit 5500rpm (only on high RPM and WOT and with the tune)...

[jpsimon]

I've been running 50% with the new maps with no mis-fires (didn't have any before either) and no thrown codes.

[dzenno]

Yah, 50 wouldn't do it for me. I did go down to 30 directly from 50 and it seems to be working..

[cocoturkey]

Originally Posted by dzenno

Yah, 50 wouldn't do it for me. I did go down to 30 directly from 50 and it seems to be working..

thanks for sharing... 40% didn't work for me. I will try 30% tomorrow~

[OpenFlash]

Originally Posted by Kelvin1000

Hey Shiv,

Any progress on the coldstart misfire issues? How is the feedback so far???

Thanks

I don't know of anyone who is having misfire problems right now other than you. But you also had a coolant temp sensor code which is also unique. Dzenno's misfire issue was diagnosed to be something other than the PROcede since it existed even after he bypassed the PROcede's fuel control. He also has over 30,000 miles on his original plugs.

That said, we are developing another version of the o2 sim feature right now. One that doesn't adjust max or min voltages at all. Instead it does exactly what the DME is looking for (a lazy version of a pre-cat sensor). This is, theoretically at least, the perfect way to do it. We'll see if this makes a difference on your car.

Shiv

[Kelvin1000]

Great,

I am also at 30K with original spark plugs but I ordered a set with a socket last night so I can eliminate 1 more variable.

I have not had the Coolant sensor implausibility problem again without the Procede and it has been a few days.

Please email me the new logic once its ready for testing and I will slap the Procede back on and give it another go (with new spark plugs).

Thanks

[335xiRT1]

im running 135i VK catless DP's, at 20% no problems.

[got_psi]

Shiv,

Maps fixed my issues !!!

Its been a couple of weeks now and no misfires/SES lights !!

These maps did the job.

Thanks!

[Kelvin1000]

Well, I have been getting cold start misfires with the JB3 and BMS sims as well now. Its funny because it only happens during cold starts and not once everything is warmed up (even at WOT in high gears I get no misfires).

I guess its most likely the spark plugs since I keep getting the problem in cylinder #3 and I do have 30K miles on the original plugs (all tuned). I ordered some new spark plugs to see if this fixes it. Hopefully its not a bad coil or a bad o2 sensor...

Has anyone cured similar cold start misfires issues just by changing the spark plugs?

[dzenno]

Probably spark plugs but you should've just swapped the coil from cyl 3 to any other cylinder to see if the problem follows the swap. I thought it was spark plugs for me too but turned out to be a coil. Easier to replace than a spark plug (even though thats too easy too) but costs about 3 times the price of the plug (around $100 a piece canadian dollars here).

Originally Posted by Kelvin1000

Well, I have been getting cold start misfires with the JB3 and BMS sims as well now. Its funny because it only happens during cold starts and not once everything is warmed up (even at WOT in high gears I get no misfires).

I guess its most likely the spark plugs since I keep getting the problem in cylinder #3 and I do have 30K miles on the original plugs (all tuned). I ordered some new spark plugs to see if this fixes it. Hopefully its not a bad coil or a bad o2 sensor...

Has anyone cured similar cold start misfires issues just by changing the spark plugs?

[R1000K3]

There can be a lot of resons for misfires during cold start. Worn plugs, to little extra fuel during cold start, bad injectors etc. The coils will be more loaded under boost so they shouldn't be the problem for cold start issues only, and it shouldn't be a O2 sensor since the O2-value is more or less ignored by the ECU during cold start.

[scalbert]

Originally Posted by R1000K3

since the O3-value

Since when is Ozone monitored by this engine.

[R1000K3]

Originally Posted by scalbert

Since when is Oxygen monitored by this engine.

[vase330]

Originally Posted by jpsimon

don't really feel much difference, car felt great before hand though.

all will be known about my sig soon, and all will be excited

If you are stage 1 or 2 you will feel some power is missing in the 2000-4000 rpm range compared to 10-9 for sure. If your car was already aggressively tuned for stage 3 you wont notice this. 10-9 has better TQ feel in that range IMO.

[Kelvin1000]

Originally Posted by dzenno

Probably spark plugs but you should've just swapped the coil from cyl 3 to any other cylinder to see if the problem follows the swap. I thought it was spark plugs for me too but turned out to be a coil. Easier to replace than a spark plug (even though thats too easy too) but costs about 3 times the price of the plug (around $100 a piece canadian dollars here).

Tried to do this today but gave up since I did not want to mess up my car as I needed it to go to work.

Those Coils are a BITCH to remove. The plastic piece looks like it can break very easily so I put it back until I can dedicate a Saturday morning to the process. Any tips on removing the coils? The DIY makes it look so easy...

Either way, the Procede is back in and more testing will be conducted for these beta maps.

[Malaka1]

Originally Posted by Kelvin1000

Tried to do this today but gave up since I did not want to mess up my car as I needed it to go to work.

Those Coils are a BITCH to remove. The plastic piece looks like it can break very easily so I put it back until I can dedicate a Saturday morning to the process. Any tips on removing the coils? The DIY makes it look so easy...

Either way, the Procede is back in and more testing will be conducted for these beta maps.

Just pull hard, try and grab it from the base and not the clip... They will come out, it just takes some force.

[Ilma]

Originally Posted by Kelvin1000

Tried to do this today but gave up since I did not want to mess up my car as I needed it to go to work.

Those Coils are a BITCH to remove. The plastic piece looks like it can break very easily so I put it back until I can dedicate a Saturday morning to the process. Any tips on removing the coils? The DIY makes it look so easy...

Either way, the Procede is back in and more testing will be conducted for these beta maps.

When I removed my coils to change the plugs, I found it helpful to wiggle the base a little to try and break the rubber seal to the spark plug.

I unlocked the plastic clip on the coil and put a long screw driver through the hole in the clip and used leverage to slowly pry them off the ceramic base of the plug.

If you use a lot of brute force I suspect you may break the plastic clip on the coil.....so just wiggle and lift progressively until you feel coil's the rubber seal starting to let go of the plug. Once it's loose you can lever it straight up with the screwdriver.

[OpenFlash]

Originally Posted by Kelvin1000

Well, I have been getting cold start misfires with the JB3 and BMS sims as well now.

Good. This makes more sense now.

Shiv

[dzenno]

In my case haven't changed my coil yet but the problems are gone. Two things changed since consistent misfires: 1) reduced o2 simm to 30% (was happening here too I think but I'm not sure) and 2) changed my fuel, not using the "oh so pure" Shell 91 with 0% ethanol and some Nitrogen in there that's supposedly good for our engines/valves..I'm back to using Sunoco 94 with up to 10% ethanol.

Here's the weird part. I had a scheduled appointment at the dealer to get the coil replaced under warranty this morning but I couldn't reproduce the issue (cause the code to go off) now that I thought I knew where the problem was.

I won't touch the coil now that everything is back to normal but I will put Shell 91 back in soon to see if it happens again...weird...

[jpsimon]

94 > 91

[dzenno]

math skillz all that talk about "purity" in gas, well, this shows that most likely engine is built to handle impurities better