Need help getting my s14 running properly diagnostic problems. Help please :)

[chriz]

Hi all Im chris!

Im a qualified mechanic have always been playing around on jap cars.
So I cant get my 200sx running right...
Its a ADM S1 S14 200sx 1995 Manual

Previous owner blew up the engine, got an engine swap done and has not
been running right since.

PROBLEM
When you drive the vehicle it bogs down and drives like its lacking power.
Were talking like it drives like a naturally aspirated four cylinder with no power!

THINGS IVE DONE TO FIX IT
engine compression test - 150psi all round ok
checked cams and reset camshaft timing - ok
carried out major service all oils & filters spark plugs etc - ok
checked ecu wiring and repaired "had ems stinger piggy back before hand" - ok
checked for ecu codes - ok
air flow meter - replace and check wiring ok
fuel pump - replace and check wiring ok
fuel line - replace and check ok
fuel pressure regulator - replace and check ok
fuel rail and injectors - replace and check ok
ignition module - replace and check ok
turbo - replace and check ok
vaccum/boost leak - secured and checked all intercooler hosing and carried out leak test ok
camshaft position sensor - check wiring set with timing light according to repair manual
check turbo intake hosing for sucking in - repaired and checked ok


So in a nutshell i have put the vehicle back to standard from what it was.
Ive checked and done most things that i can think of and the problem is still there.

THINGS LEFT TO CHECK
Blocked cat/exhaust?
Fried ecu computer?
Ecu computer wiring earth and wiring?

Looking for computer and going to unbolt exhaust to check soon!
NOTE - checked my vin with nissan parts system i need a
WF 23710 74F01, WF 23710 74F02 or WF 23710 74F03 ECU computer.
They are hard to come by!!!

Anyway if anyone has any ideas I would really really appreciate it.
Ill take any help i can get!

Ill post up a pic of my girl so this thread isn't so boring for you guys/gals!
Also got a pic of the inside of the ecu can anyone tell if its been remapped?
Attached thumbnail(s)

Below link for pics

[haveaparty]

Coils could be rooted. I would check them.

[chriz]

thanks haveaparty!

ill put that on the list!
actually ill borrow my mates ones!

Cheers man
-Chris

[Skylar]

So, you actually need to describe the problem. "It bogs down" means what? Bogs down when you floor it? Just seems to struggle pushing the car around? or just drives like an NA SR but worse because it's a low comp turbo motor that never hits boost?

I don't think it's coils. Coils break up and stutter usually at a certain rpm/load.

Don't think it's blocked cat. They struggle to get past idle and can't really drive the car.

Ecu can fail and run the car in limp mode without the ecu telling you it's in limp mode. Would swap ecu if you can find one. Not 100% sure but any s14/s15 ecu should do the trick. I can look this up for you if you like.

Is it something as simple as the wastegate actuator is stuck open for some reason/actuator not hooked up to wastegate arm. Does it even come onto boost?

Here's an easy way to check for ecu fail. Put the timing light on and free rev the car. You should see the timing advance then retard as engine comes onto boost but not so much. I probably need to explain better but the timing should be following what a 'normal' timing map looks like and not a super retard melting pistons limp mode map.

[haveaparty]

I only sed coils cause it wasn't on the list lol. I know wat happens wen one breaks down but it's worth a shot. And now it's mention check to see the actuator arm hasn't come off cause mine used to do this and yeah just ran like a NA. Also take the actuator hose off and see how it runs.

[chriz]

Ok guys update!
In the process of borrowing my mates cam sensor and timing that the turbo blew up!
It went pop and now whines its head off as well as blowing smoke...

Maybe that was my problem all along, it was boosting but not enough and the turbo may have been working its arse off to get to the right pressure.
It was a second hand turbo from the internet so you cant trust anyone can you...

Ill whack a s15 turbo on now an let you guys know.

Thanks for all your help!