R33 Running Rich

[Firman]

Hey I have this r33 gtst which i bought about 2 months ago from a mate. It had bits taken off the engine so i got another rb25det which has done like 90000km and slapped it in. It was running fine in the other car and when i got it into my car it was running well. I was driving only a day ago when it started to cough and splutter and run real bad! If i tried revving it, it would stall so i took off the afm and it ran abit better but was stillrunning really rich. I change the coils and cleaned the injectors looks like uts getting too much fuel. Would the afm be the main issue? Its lightly modded fmic, 3 inch exhaust and pod filter which is about it. Help me out guys really need to get this running cause i was planning it to be my daily as just got it running ahahah any help will be appreciated

[Firman]

And also when i plug afm it just stalls. Its obviously the afm sensor but would there also be any other factors of running bad?

[Ben C34]

What?

You said it yourself the afm is a problem.

Replace it or clean it and see what happens.

[Firman]

Yeah i cleaned it still runs bad

[Ben C34]

Replace it.

Check for leaks in pipework.

There are heaps of reasons why it could run bad. All are a guess based on the little information you have given.

Go ask your mate to fix it.

[scotty nm35]

Either replace the AFM or resolder the pins inside, they often get dry joints where the plug pins meet the board, especially if you play with the wiring/plug.

[Hadouken]

Hold on here.

Did you check intercooler pipes and all vacuum lines?

It sounds like you have a boost leak hence why it started dumping heaps of fuel and stalled.

Unplugging the afm puts it in limp mode.

If however you do not have any loose pipes or cracked boost lines then yes replace your afm. But check the cheap/free stuff first

[Firman]

Lol my mates hopeless :') was asking you guys cause youre more familiar with the skylines than i am!

And will do mate ill check the intercooler piping, etc tomoz after school! And i might aswell buy a z32 afm while im at it or should i just get an original for the time being?

[Hadouken]

z32 = tune

[89CAL]

Simple. Fix/Replace AFM first and then you can start diagnosing other problems

And when Hadouken says Z32 = Tune, that also means getting an ECU/Piggyback to enable it to be tuned. You can tune a different AFM into stock computer

[Ben C34]

And when I said check for leaks I mean pressure test for leaks.

Google it

[Firman]

Yeah just realised about the z32 afm :') yeah will do a pressure test mate cheers for the help will tell you how it goes when i get to it!

[Firman]

solved it today! checked maf sensor and cleaned again and connectors and it worked abit better still shit then checked all hoses and found the one that connects to the top of the turbo came off! mustve been when i floored it down the road for the first time :') still runs a lil rich though but alottttt better than before im guessing my timing could be out considering the motor has only been in for about 2 weeks now so ill get the timing done! cheers guys for the help!!

[Hadouken]

Good work.

[Hadouken]

Check your plugs now. They are probably black

[Dose Pipe Sutututu]

Check your plugs now. They are probably black

just take it to a drag strip, clear it out