Alright so I got a few issues right now that Im hoping maybe some of you on here could help me with.

First off, on startup and the car is cold it never wants to start running after it fires unless I open the throttle myself.
Also when I goto release the clutch it really likes to die unless its really warm.

Second im not sure what modifiers are doing it but my idle afr's seem to go from really lean like 15-17 AFR on startup to like 11.9-12.5 regardless of what temp its running at it seems.

Let me just start off that my tune is based off the base calibration. I rescaled it and have worked it best I can with street tuning until I can get some money together to get on the dyno.

The list of mods that matter.
3" catless TBE
evo IX turbo
hks 272's
hks cam gears (not adjusted)
2.5inch intercooler pipes
3.5inch intercooler
turboxs bov
ets intake
hallman MBC

Im using the AEM 5 bar map sensor and GM IAT. Currently have boost limited at 15psi just to be safe.

Map is on 91 octane pump gas. Altitude is 5899 feet. Temps have been ranging between 45-10 degree's F.

If you want to look at my calibration to help me pm or post your email and i'll send it to you.







Thanks

 

This is hard to make a guess without seeing your Fuel map because each of these tables are based on what cell your fuel map is hitting during their active times.

What I can say is most likely your Warmup enrichment table is not nearly rich enough. In every car I have tuned this table is always moving steadily down starting around 80 @ -40 and hitting 0 right before +176 or normal operating temp depending upon the car. But remember anytime you change the main fuel map cells in the idle or warmup cell zones this warmup enrichment will change also as these modifier tables read from the main fuel map so always keep that in mind.

Keep at it and learn everything you can.

 

PM me and I will give you my email address so you can email me the map, I will look it over for you.

 

Here's my fuel map.



But thanks for the helpful tip, I'll go ahead and mess around with the warmup enrichment.

 

add fuel to start enrich
go to the advanced startup templete and add after start fuel...

the car is not staying running after cranking because you don't have enough after start fuel... After it does catch, you don't have enough start enrich and that's why it's lean. While the ems transitions from start enrich fuel to the base map is the reason why you're going rich. Before you do any of that you need to adjust your idle for when the car is at operating temp, you should be idling around 14-15afr, wherever the car pulls most vac. 11's is way too rich for idle. Once you've got that set add the cold start and after crank fuel....let the car sit overnight so it gets cold again, then tune those tables. Those are affected by the base fuel map so you have to work the basemap first, then the modifier tables.

Startup can be tricky! good luck

 

Thanks a lot! I'll work on that today.

Also on the idle% vs target idle, what effect does that have by changing it? I put it at 0 and the car died but what does making it bigger or small affect?

 

idle% vs target is the table that controls the iac motor. Usually the more % the more the iac opens, the higher the idle.

What I normally do is copy my idle target table, then set it flat starting at like 1300rpm, depending on what your high idle offset is... look at the idle target value in the parameters and then tune that breakpoint on the idle% vs target table, adjust it until you get to about 0% idle fb. Once you go through all the breakpionts down to your lowest idle rpm, paste your orig idle target table back in...then highlight your whole idle% vs target table and press the + until you achieve about -5 to -7% feedback. Having the fb on the neg side helps prevent stalling. Don't forget to put the lights on and a/c etc, you'll need to take that into account because it will change idle properties.

if the car stalls when you are coming to a stop or coasting you'll want to raise the hi idle offset rpm, and may need to add to the high idle time.

also sometimes with larger cams you may get mild surging at leaner afrs at idle, or lower rpms.... one table many don't take advantage of is ign vs rpm error, basically this is set up to add timing when you're below your target rpm, and it removes timing when you're above your target rpm. I've found this table to really help stabilize idle, esp when you put electrical loads etc on teh car.

 

project_skyline you have an email, let me know if it works out for you.

 

Im about to go test it out. Also my car doesn't have AC.

I hope that map helps evil__eagle. I'll let ya guys know.


Whats a good value for the idle motor rate?