ECMlink PTE1200 Rough idle

[mjm0157]

Hey guys, dropped down my Ignition timing map back down to stock, Trying to get these pte1200s dialed in.
Idle is pretty rough, seems like it is surging, going in and out of closed loop. AFR is very close to where its supposed to be. Have tried adjusting ve table, global and dead time. It does not like going into closed loop when its idling with 14.7afr. when I was running stock injectors and gm maf it normally idled with 15.6 This is the best its been. any thoughts?

new injectors and new injector seals...possibly boost leak at injector seals in head?

 

[NOSLO2PT0]

Why are we guessing at this before a boost leak test has been done?

 

[We're on Boost]

Were you doing narrow band simulation when you were on stock injectors and gm maf?
Did it idle ok then?

 

[mjm0157]

Why are we guessing at this before a boost leak test has been done?

I did do a boost leak test, but just swapped in new injectors. So there is possibility these orings leak. When I have time going to do another blt.

 

[mjm0157]

Were you doing narrow band simulation when you were on stock injectors and gm maf?
Did it idle ok then?

Just for shits used narrowband sim. Before injectors were swapped and I was running gm maf it idled pretty well. But always idled with an AFR of 15.6. The front o2 cycled well.
If I turn back on front o2 sine wave looks horrible at 14.7. It doesn’t oscillate like it should at 14.7, I get some oscillation with narrowband sim, I set the switch over point at 2.35v right at 14.7. The Wideband was calibrated and is accurate on log

 

[Vegas Smith]

Tps needs to be set. I would get the injectors cleaned if they're used. Airflowperrev is likely too low for closed loop. Double check wideband linear voltages.

 

[mjm0157]

Tps needs to be set. I would get the injectors cleaned if they're used. Airflowperrev is likely too low for closed loop. Double check wideband linear voltages.

Tps was adjusted via ecmlink. And is 0% at closed throttle and 100% at full. It went into idle before with gm maf. It goes in and out now. The injectors are brand new out of the box. I raised ve to 60 and airflowperrev is about .24 when ignition timing is 5deg. But then it seems like idle is hunting with ignition timing going up and afr swinging.

 

[Vegas Smith]

TPS voltage should be 0.63v at idle. It's still not correct and might need to be physically adjusted. Ignition will bounce up and down at idle; that's normal. Only time it sits still is when you set timing. What cams are in the car?

 

[mjm0157]

TPS voltage should be 0.63v at idle. It's still not correct and might need to be physically adjusted. Ignition will bounce up and down at idle; that's normal. Only time it sits still is when you set timing. What cams are in the car?

I will set that, and re calibrate tps. Just fyi not using idle switch simulation. When I do another BlT, not sure if you remember my other post but I do infact have some small leaks on brand new greddy bov.

Right now onlything stock in motor is head. Bottom end is fully built.
Top end has stock valve springs, oem seals, multi angle grind on ss valves. 1g cams and revised lifters

 

[Vegas Smith]

I would simulate idle switch and set your idle to 750 after fixing any vacuum leaks.

 

[steve]

I would adjust the 2G TPS according to the factory spec of where the IPS switches and then run the DSMLink TPS adjustment and NOT simulate the idle switch. But different people have different ways to get things done.

 

[mjm0157]

Different strokes for different folks, but enjoy the input fellas.
I do like the idea of freeing up tps input for secondary fuel map! But thats in the future. Going to try and find some time to make sweet love to the car this weekend. It looks like the t3 turbo has a bit of a leak, noticing a brown spot on aluminum radiator. So I got new gasket and arps.
I will take care of that, and do another BLT and see how she does.

 

[Vegas Smith]

I would adjust the 2G TPS according to the factory spec of where the IPS switches and then run the DSMLink TPS adjustment and NOT simulate the idle switch. But different people have different ways to get things done.

The reason I say enable simulate is it guarantees that people have a functioning idle switch. If people at some point do it the correct way then it would make no difference if it's simulated or not.