1982 SC with EFI ITB doesn`t start

[Cheshire Cat]

Well, it is time to ask proper community for an advice I reckon.
Long story short - 1982 SC with Triumph 675r throttle bodies and EFI. Quite common things this days so nothing really spectacular here.
The problem is - she doesn`t start.
Working with this:
EMS EM-80 ECU (Ozzie company)
AEM EPM for the signals
COP
Main load - TPS
Wanna go sequential injection with wasted spark. But for now batched fire will do.
Firing order set to ignition ch.1 for 1-4 cyl, ign. ch. 2 for 3-6 cyl, ch. 3 for 2-5
Timing light shows TDC withing 5 degrees. All the plugs give fire.
But she still doesn`t start.
Gentlemen, let me know what you think cos I`m ran out of ideas. I`m frustrated.
https://www.youtube.com/watch?v=kdhvlmJOcMM

[JJ 911SC]

If the plug are firing, you are probably missing the fuel.

[Cheshire Cat]

Originally Posted by JJ 911SC

If the plug are firing, you are probably missing the fuel.

Tried on some point to open a throttle, ended up with a flames from the intake. So, fuel is there.

[al lkosmal]

I am somewhat experience with EFI systems, but not familiar with the EM-80. However, if i can review your datalog file, I may be able to help. What software program are you using for data-logging? If you have a datalog file and i can download the logging software, i will review your log file and see if i can spot the problem.
regards,
al
PS: It's weird, but it appears that your throttle bodies are moving/jumping every time there is a backfire through the intake...like they are loose and not bolted down. If so...that would be a massive vacuum leak.

[JJ 911SC]

Originally Posted by al lkosmal

... PS: It's weird, but it appears that your throttle bodies are moving/jumping every time there is a backfire through the intake...like they are loose and not bolted down. If so...that would be a massive vacuum leak.

I was not sure if I was seeing things... That would not help for sure.

[kjchristopher]

Resembles timing being 180 degrees off.

[kjchristopher]

Originally Posted by al lkosmal

PS: It's weird, but it appears that your throttle bodies are moving/jumping every time there is a backfire through the intake...like they are loose and not bolted down. If so...that would be a massive vacuum leak.

Almost like they are attached with rubber bases that bolt to the intake.

[al lkosmal]

Originally Posted by kjchristopher

resembles timing being 180 degrees off.

+1

[JJ 911SC]

Originally Posted by kjchristopher

Resembles timing being 180 degrees off.

Australian ECUs

[JJ 911SC]

Originally Posted by Cheshire Cat

... Firing order set to ignition ch.1 for 1-4 cyl, ign. ch. 2 for 3-6 cyl, ch. 3 for 2-5...

While this is correct (Direct Fire Unit to Spark plugs wiring), your ECU like mine (Electromotive) probably trigger the injectors sequentially 1, 2, 3, 4, 5 and 6. Thus only 1 and 4 are direct match (wiring from ECU drivers to injectors), the others need to be workout.

Is this a new installation?

Do you have a schematic of your set up?

[gomezoneill]

Definitely a timing issue. Send Al your logs he'll figure it out.

[Cheshire Cat]

Originally Posted by al lkosmal

I am somewhat experience with EFI systems, but not familiar with the EM-80. However, if i can review your datalog file, I may be able to help. What software program are you using for data-logging? If you have a datalog file and i can download the logging software, i will review your log file and see if i can spot the problem.
regards,
al
PS: It's weird, but it appears that your throttle bodies are moving/jumping every time there is a backfire through the intake...like they are loose and not bolted down. If so...that would be a massive vacuum leak.

Thanx Al for the input. I was hoping for you to help since basically you're posts I was reading a lot.
Anyway, tb's are bolted on a rubbber adapters and they are a bit flexible. But I will tighten the bolts for sure.
Vaccuum leaks do exist through the tbs vacuum nipples I don't use. But on this stage I reckon it doesn't matter. The goal is to start her and fix the rest knowing she's alright.
I will try to figure out how to use a logger. Have to check memory card in theECU might happen there ar plenty if logs.
Btw, I have tried to move the ignition to 180 degrees and seemd like the engine struggled a bit less.

[Cheshire Cat]

Originally Posted by JJ 911SC

While this is correct (Direct Fire Unit to Spark plugs wiring), your ECU like mine (Electromotive) probably trigger the injectors sequentially 1, 2, 3, 4, 5 and 6. Thus only 1 and 4 are direct match (wiring from ECU drivers to injectors), the others need to be workout.

Is this a new installation?

Do you have a schematic of your set up?

Yes it's a new one. I wired the injectors with the original sequence ea. 1-6-2-4-3-5. Not sure if I have to leave them like that though.
And again, this is not vital for wasted spark I believe.

[Cheshire Cat]

Thanx guys for giving an idea of what to do with the timing. You kjchristopher and Al were right. She was almost 180 degrees off. Fixed that and all the vacuum leakis through the vacuum valves and she has started.
And the 6-th cylinder tb a bit loose on the adapter, will make it tight.
https://www.youtube.com/watch?v=oia3v7hQm6o
if you`re interested
The happiest day of a year so far ))

[JJ 911SC]

Great, on to the next project...

[al lkosmal]

sounds like it is actually running pretty good. Now, as you proceed to fine tune.....datalog and review....make changes..one at a time...datalog and review...make changes...one at a time....datalog and review.....I think you see where this is going...........

regards,
al