tuner studio / speedy efi help

[jpryorx2]

turns out the fuel pump was marked backwards so once i had fuel pressure i did get it started today but coils 1 and 3 are not firing at low rpms and it will not idle most likely because its only running on 2 cylinders. also it will only run with the throttle cracked open

[Bruce.m]

Heading in the right direction then.

[jpryorx2]

while i wait for speedy to respond again i figure i'd post an update here. so cylinder #1 seems to fire 2 or 3 times right as i start to crank it. then is dead untill about 2000 rpms then fires great and cylinder #4 never fires at all. i checked for voltage at the connector and got nothing on the trigger wire from the ecu. right now speedy told me to run it semi sequential to get it up and running but untill all 4 cylinders are firing i really can't go any further on tuning.

[Bruce.m]

If you switch to semi-sequential it doesn’t need a cam sync. So it fires the injectors in pairs. That simplifies the task for the ECU. If that fixes the problem you are likely to be losing sync on cylinder position.

[Bruce.m]

Obvious one but remember we have an unusual firing order. So injector 1 goes to cylinder 1, injector 2 is cylinder 4, injector 3 goes to cylinder 3 and injector 4 goes to cylinder 2.

You can use the hardware test function to fire the injectors individually but that is deactivated normally and the menu is hidden (the coil test is a bit nasty & can fry a coil, so I’d not use that).

[jpryorx2]

i have double and triple checked the wiring and its all in the proper order. i wired it to be full sequential so 1 output per cylinder but when i couldn't get it to even show rpm in tunerstudio they had me switch it to semi sequential and unplug the cam sensor which did get it started. from what i'm reading semi is wired the same as full but actually fires the coils in pairs 1 and 4 2 and 3 but its just doesn't seem to be doing that.

[Bruce.m]

Yes, that’s right. It’s batch firing in pairs but has separate wires for each. Given your situation I’d use the hardware tester function in TS to confirm you don’t have a hardware fault.

[jpryorx2]

completely missed your post about semi sequential as you can tell i'm still trying to learn all this and i do appreciate all the advice. it's another rainy day here so i'm trying to read anything i can find related .my end goal is to have this buggy running full sequential but rest of our vw's are pretty much stock so im thinking batch fire wasted spark when i get around to converting them

[jpryorx2]

i forgot to mention it s racking up sync losses 47 in about a minute of running even tho the box at the bottom is green and says full sync

[Bruce.m]

Start / stop a log in TS. Then open in mega log viewer. You can include the sync loss counter in the log viewer.

I’m at a similar point to you and dealing with similar issues. I get a number of sync errors but they all happen during cranking so I’m leaving that for now.

I’ve also switched to semi-sequential so the CB cam sync is being ignored. Once I solve the top priority issues, I’ll go back to sequential injection and adjust the cam sync slightly. I’m also using a wasted spark coil (VW 106b) which will do the job nicely.

Since you are using a speeduino based ecu, you can access the hardware test screen if you activate it in your project settings. But I’d recommend not using the coil tester or you risk frying your ECU (the dwell is far too long).

[jpryorx2]

when the weather lets up some i'll go test it . i do have a set of noid lights but i think all the injectors are firing and my whole problem is ignition. i've been using the timing light to check if the coils are firing and it never flashes for cylinder 3 and on cylinder 1 it starts flashing right around 2k i can hear when it starts firing. now that i type it i wonder if i could have a broken plug wire and the spark is jumping the gap at higher rpms. ive had that happen years ago on an old truck. so if i unplug my coils i should be able run the hardware test and see if the ecu is sending voltage to the #3 coil without hurting anything. i already know the coil itself is good

[Bruce.m]

Good idea.
If you are seeing the injection led indicator flashing then the earth side switch is working. That doesn’t confirm the injector is powered but you checked that separately. Coil led lights when the coil output goes high. Are you triggering the coil as “going high” or “going low”?

Does sound more like a trigger issue & the tooth logger is the best tool to diagnose that (need to pay for it) if you don’t have a scope.

[jpryorx2]

my ecu doesn't have any visible leds on it for testing i just plugged the noid in at each injector . coils are set to wasted cop going low. i did end up buying tuner studio and to me the tooth logger looked good but again im learning. speedy did have me send them the log and they didnt say anything was wrong there. im still waiting to hear back from them on the coil issue. if this rain would stop id be out testing it right now

[jpryorx2]

here is a screenshot of the log

[Bruce.m]

That log appear to show 1 sync loss & that while the engine was shutting down. If you started the log after the engine was running the sync losses possibly happened during cranking.

You log does say you have ignition advance of 0 degrees at the moment you took the screenshot?!