Jump to content
SAU Community

Recommended Posts

Hi guys i'm having some Issues wif my line.

First of all i was driving it along one day and it was fine. Then next time i drove and started it up

a lot of black smoke came out and it was running really rich and idle was was not very good. If you rev it would go

down instead of going up. It's not drivable as it would splutter and chugga chugga chugga Big Red Car... hehe..

Sounds like it's got really Lumpy Cams and is dropping out. I cleaned out the plugs and tested all my splitfire coilpacks and they are fine.

Not sure what it is though..

Mod list are

PowerFC

2530 .84 A/R Hi Flow spec Turbo

Stock AFM

Stock Injectors

Bosch 910 Pump

HKS EVC 5

Hmm that is all i can think of that it's important.

I don't understand it all as it was running perfectly and now it's...

Link to comment
https://www.sau.com.au/forums/topic/315053-limp-mode/
Share on other sites

If you have a d-jerto PFC then the afm wouldn't affect the idle like that, but if its not then yeah sounds like the afm, just give it a spray with some contact cleaner, and if that doesnt help then yeah ask another member to borrow theirs to help diagnose the problem, i wont mind you using mine just im not able to get back till wednesday, but give that a try to start with

Link to comment
https://www.sau.com.au/forums/topic/315053-limp-mode/#findComment-5164298
Share on other sites

i dont think powerfc has limb mode that prob why it stalled with the afm unplugged. just try borrow another rb25 afm. also did you put the filter back on when you cleaned out the afm. afm dont like it when there isnt a filter.

Link to comment
https://www.sau.com.au/forums/topic/315053-limp-mode/#findComment-5166311
Share on other sites

Ok Update... it seem to have gotten worse.. it's running on 2 cylinders now..

doesn't make sense how i'd lose 4 cylinders all of a sudden...

Goin 2 possibly check the loom for the Coilpacks.. if i do have to replace it?? how much do u reckon it will cost?

Gonna possibly tow it to the workshop that installed my new turbo 1 week ago so they can do further diagnostic...

Edited by Black_CSR
Link to comment
https://www.sau.com.au/forums/topic/315053-limp-mode/#findComment-5173007
Share on other sites

Ok another Update.. Replaced all the Plugs and it's running on all 6 cylinders again..

still idling rough and lots of black smoke n running rich.. i guess it fouled the plugs pretty quickly running rich??

Goin 2 burrow off an AFM from a friend and see how that works..

Do u guys know th resistance value readings of the AFM on it's 3 pins?

I'm gonna use a Multimeter and check the readings..

Edited by Black_CSR
Link to comment
https://www.sau.com.au/forums/topic/315053-limp-mode/#findComment-5174903
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Harness is for a s1 Rb25det, and it is engine and lower harness.  the old harness had broken off plugs and was in very rough condition/exposed wires and splices etc. it is not able to be put back on the car, I could visually inspect to see if they had rewired any pins on the ecu plug. The fuel pump definitly isn’t turning off it’s an external pump and very loud you can hear it. Will look at the other harness tonight, am also going to pull the fuel rail and watch the injectors spray, will update here with what I find. Pretty sure at this point it has to be something to do with injectors because car will fire up on starting fluid and cas is clicking the Injectors. Fuel pressure is steady 43psi 
    • Check the injectors flow evenly, and are actually flowing what you and the ECU think they should be flowing. If it's starting up on starter fluid, you have a fuel issue. Is it possible under cranking your fuel pump is turning off?   The harness you replaced, is that the whole engine harness? Do yourself a test, and drop the old harness on and plug it into the Z32 ECU. It's possible they've wired things different. From memory S1 to S2 is different in RB25 and you may have a wrong loom
    • I haven’t pulled the injectors to watch them spray yet but they are clicking from the cas and all of the spark plugs are wet with fuel. I’ve thought the cylinders were being flooded from the beginning and was hoping fuel pressure would fix it. Tonight I am going to pull the rail and watch the injectors spray. Don’t know how to test/diagnose if the plugs are firing in correct sequence but that should be a timing thing and as far as timing goes my car still has the half moon for the cas can only install it 1 way. And my mechanical timing is 100% correct I posted photos above. Confirmed with the balancer on and off. 
    • I checked spark on all cylinders and they all visually have spark with the plug pulled and grounded, but plug 1 is the only one that fouled. This was a running swap that blew up and was rebuilt by a machine shop, put a new wiring specialties harness and did all gaskets, studs, and bolts while it was out.  compression is 135-150 across all cylinders. Aside from that from my understanding with the z32 ecu and maf the car should start regardless. The wiring for TPS and the dual 02 sensor/ dual knock sensor stuff shouldn’t actually stop the car from starting or even running well, (just slightly rich)  they just give fault codes. Car supposedly is supposed to start as long as you have z32 afm and ecu with the nistune base map and that’s info coming from a well known and trusted tuner who does a lot with SR/RB (Rsenthalpy). After more trouble shooting today where I’m at right now is that the cas is sending signal to the injectors they click while spinning the rotor, Fuel pressure is now set at 43psi, all cylinders have good compression and all of the plugs looked great (just wet with fuel) except for cylinder 1 which was very black (cylinder 1 has 150psi compression). all of the coils generate spark if pulled out and grounded out on the head. On the fuel pump car just pops into the exhaust. On starting fluid car will fire off. Hard to tell if all cylinders are firing off but definitley a couple. sounds like all of them but it’s only for 3-5 seconds hard to tell. 
×
×
  • Create New...