failed emissions this morning.

**EagleMark** · 03-19-2014

It is at 14:1 Stoich. The Air Diverter is coming on in data log... but your Ca car does not have one? Ooops! It does have a lot of spark compared to stock and just looked at this log and no knock counts.

Lance has this always idled hot? It was up to 210*f at the end of this data log. Fueling was where I always shoot for, little rich of 128. But when it hit 200-210*f the BLM went to 108 and I think that's bottom. MAT was at 125*f.You got the stock air cleaner on or the Open Element? So I'm wondering if it getting hot is causing the fail?

**one92rs** · 03-19-2014

I can set the fans to come on when I want them. flexalite controller. I can set them cooler. when we were tuning I had the open element air cleaner. I have to put the stocker on it when I do emissions. I have drilled a bunch of holes in the bottom to try to get as much air as possible. what can I do to help it out.

**EagleMark** · 03-19-2014

Get a base without holes so it sucks cold air! and get the fans on earlier so it does not get this hot.

I just don't know what to do with tune to help pass, waiting for tips?

**Fast355** · 03-19-2014

Originally Posted by EagleMark

Get a base without holes so it sucks cold air! and get the fans on earlier so it does not get this hot.

I just don't know what to do with tune to help pass, waiting for tips?

I would start with the stock spark map and reduce the o2 target voltages 10%. Set stoich at 14.7. For cleaner emissions, leaner, later, hotter.

**RobertISaar** · 03-19-2014

i could be wrong...... but generally, hot engine = cleaner emissions(well, except for NOX).

**one92rs** · 03-19-2014

well is blocking off the pcv going to help? I can do that and see with another log. ill set the fans to come on at 198 or 195. even if they stay on that's ok. I have an offroad chip from hypertech here but it will throw a 32 egr code. I have a negative backpressure egr on it now. I can throw the other chip in and see what she does with it.

**EagleMark** · 03-19-2014

Looking at the log when it got hot at end, it was idling and BLM bottomed out at 108. Earlier in log they were 115 which is under O2 feedback. So something about hotter is cleaner is not working here.

I can mail you another chip with adjustments like Fast indicated? But I would get fans on earlier. Leave the PCV on...

**one92rs** · 03-19-2014

at this point ill take what I can get. fixin to go out and put in that hypertech chip I have. perty sure it is about stock. then I will log tht and post it. would the evap canister purging fuel tank pressure cause any of this? and was the egr working in the log yesterday or is that able to be seen. hell I might as well throw a 180 thermostat back in it I suppose since it seems to be working ass backwards.

**EagleMark** · 03-19-2014

Temperature was fine until you stopped driving = stopped getting air to cool. Engine temps went up and BLM went down to bottom and stayed there. In the bin definition I can see where spark is changed to compensate for temperatures but not fuel? Doesn't matter, it won't help the problem, just need to keep engine temps closer to operating range. Is this the stock thermostat?

The data log was only to see if there was an obvious issue. It's not going to tell us if we made emissions readings better or worse. At this point the data showed the engine get's to hot at idle. Maybe this is just after a highway cruise, but still there.

EGR is not in data stream.

For now the only thing we can fix is fan on time to keep engine at operating temp and tape up holes letting hot air in air cleaner. We will see if there's any more chip tips and I can mail you one. I don't do emmissions tuning so it's only to give you a helping hand. Have no experiance here and don't want any...

**one92rs** · 03-19-2014

Yes stock thermostat. Was thinkin if i got the engine to run around 190 it would be better. My 180 runs it there. Ill turn the fans down so as soon as i stop or skow down they come on

**RobertISaar** · 03-19-2014

Originally Posted by EagleMark

Looking at the log when it got hot at end, it was idling and BLM bottomed out at 108. Earlier in log they were 115 which is under O2 feedback. So something about hotter is cleaner is not working here.

115->108 = 6.5% less fuel being used. if not cleaner, it's at least more efficient.

**one92rs** · 03-19-2014

here is with the hypertec chip

**EagleMark** · 03-19-2014

Well the engine stayed cool at idle at end of log, around 192*f but BLM still went to 108. Coolant temp stayed there a long time then at very end it started to go up again to 203*f like you shut the fans off?

There's still no signs of anything wrong.

Just let me know what you want to do? Seems like Fast has a plan and we will go with that unless we get more info...

**one92rs** · 03-19-2014

well cansome settings in a chip help it out? if so lets go that way. I was messing with the fan settings. if it getting hot is where the issue lies I might try a cooler thermostat just to see.