We have our drive clean tomorrow on the 1G it will be a 2 speed idle test..

We are running short on time to get the car ready for pines and I do not to want to screw around with the possibility of failing then brining it back... so the plan was to lean it out at idle and 2500rpm... I am new to this and have not had time to really figure out how to fully use the ECMLink outside very basic functions...

So my question is do I drop the Adj% in the MAF section at the low end (I assume low end since I will sitting at the shop)... Any suggestions on the values?

OR should I be playing the with Fuel tables?

Any help would be appreciated....

D.

I'm more knowladgable with SD myself, but you would want to adjust the MAF tables, not the global fuel settings.

My brothers car just passed, <1/8th tank of 94 and a gallon of meth. 199/200 HC's at idle. LOL

Also dont lean it out too far, as your emissions will go up after a certain point.

Where would one pickup a gallon of meth?

On the maf setting I assume I would be playing with 0-250 mhz and drop it 10-12% and smooth it up a little?

D.

CT has meth.

Also bump up your idle, my car didn't pass at 750 but barely passed at 1000rpm

You don't want to lean it out too much. Killing off some timing in the test areas is where it's at!

Aim for 14.7:1 AFR. Going richer OR leaner from there can cause excess emissions.

Agree with Mike: pull some timing. Methyl Hydrate is likely the name that CTC (or any half decent parts store) uses for methanol. Setting the idle closer to 1000 could help too.

Is this the first time this car is being etested in your name? (ie. Have you ever plated it under your name in the past, or is this a "transfer of ownership" etest?)

Aim for as lean as 15.2 before meth if you can. Small amount of high octane UNLEADED gas along with a nice amount of methyl hydrate will help.

First off... if your base tune is in good order and you Cat is working you should have ZERO issues passing a 2 speed idle test. If you could post an idle and 2500 log that would help aswell.

I bumped idle up to 1100 and added timing. Passed with flying colours. Also some would recommend you use 87 octane fuel instead of a higher octane.

Yeah definitely don't use high octane for an etest. But Stephen is right, if your cat is working and your idle tune is good you should be alright.

I had the impression that you guys haven't had much time to tune it yet.

We have done no tuning. Base idle was sorta done again tonight after we tried to do it with a MAF that failed as we were tuning.

We have a freshly built engine with a brand new high flow cat near the end of the pipe. We will use some 87 as the tank is empty as it is.

I have currently set it to an idle of 1000 and pulled -4 degrees if rom 0-3000 and -4.7 from 50hrz and graded it up to 0 at about 200 hrz.

This will be the first time we have plated and done a drive clean on this car.

D.

Okay, if it's the first time then you can't get a conditional, unfortunately. I think you're on the right track though; get the idle tune as stable as possible and you should be fine.

Good luck, I hope she passes. I'm excited to see this thing come to life

+1, I remember seeing it when you guys were pulling it apart would be wicked to see the final product!

Just thought I'd share my recent etest pass experience.

8L of metal hydrate from Canadian tire, 1/8th of a tank of 94 octane gas (not on purpose but it's what was already in the tank), pulled 5 degrees of timing in the low and high speed idle cells and had leaned out the idle to just below 16 afr, took her for a little run to warm up my vibrant high flow metal core cat (2seasons old) and she passed with colours....not exactly flying Haha. This was on SD not a MAF.

I passed with a MAF, new vibrant cat in the down pipe and 950cc injectors (dialed in) 2 years ago no problem.

Good to see the methyl hydrate trick still working for e-tests. It's obviously not a guaranteed pass solution but I have seen cars blow "zeros" with meth in the tank.

I just ran my talon as a Chevy Cruze when I had to do it

Clearly the solution to global warming is to convert all cars into alcohol/methanol burning monsters!

What he said. I failed miserably, dead O2 sensor was the first reason. I put a wideband in there, Stephen helped me A LOT with the base idle tune. Went in and still failed but barely. So I took her for a nice hard long drive, and she passed with decent numbers.

I only had 94 octane in the tank and did nothing else

We passed. We took her for a long run first to get her hot and I pulled 5 degrees of timing from 0 to 3000rpm and leaned it up from 0 to 500 hz and set the base idle to 950. No meth and only 87 gas.

Car died driving back from the drive clean with a wonky alternator... Which might be the reason we had some oddness with doing the tune.

Thanks guys one more step closer.


D.

Good to hear