Jump to content
SAU Community

Recommended Posts

hey this 33 im working on i cant get it to run with an AFM plugged in at all.. runs fine with AFM unplugged but the min you plug it in it stalls and wont start, fires but wont run. has a known working afm on there and then tried the one off my other car.

have searched for air leaks.. nothing found.. any suggestions?

Link to comment
https://www.sau.com.au/forums/topic/408401-rb25-wont-run-with-afm-plugged-in/
Share on other sites

so frustrating.

continuity test on the power, signal and ground wires all tests out ok, with the engine off afm plugged in its reading 0.5 volt on the afm... if i blow into the afm it goes up in volts to 1 volt ish before i run out of breath haha. when i crank the car it doesnt drop volts on the power side and on the signal sie it goes up slightly with the extra air its sucking in while cranking.

tested both at plug and ecu. fine.

im suspecting its possibly fuel pump at this stage. with afm unplugged and the fuel return line off the hose im getting no fuel coming out the rail when idling.. when i raise the revs some fuel comes out but then as i raise the revs til the point it cuts out with no afm plugged in (about 2500 rpm) not much fuel is coming out again.

am thinking dodgy fuel pump, which is what caused the previous motor to blow. however why wont it run with afm plugged in?!

with it unplugged the default maybe at certain revs to the so injector duty goes up etc so it just idles on the bad pump, when you rev more it leans out and stalls?

just throwing ideas around

also try unplugping the ecu coolant sensor

Edited by Dan_J

Does it blow alot of black smoke?

I have an s13 just come into shop thats had an rb25 wired in. Similar issue's but choofing black smoke, found the tps wiring has 5 v to signal so ecu thinks its foot flat

nah no black smoke\

solved it... its a f**ked fuel pump.

got a mate to unload a can of areostart into the AFM while i was cranking it and it runs and revs as long as there is an areostart supply haha, fuel pump lacks pressure

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

    • Hi all,   long time listener, first time caller   i was wondering if anyone can help me identify a transistor on the climate control unit board that decided to fry itself   I've circled it in the attached photo   any help would be appreciated
    • I mean, I got two VASS engineers to refuse to cert my own coilovers stating those very laws. Appendix B makes it pretty clear what it considers 'Variable Suspension' to be. In my lived experience they can't certify something that isn't actually in the list as something that requires certification. In the VASS engineering checklist they have to complete (LS3/NCOP11) and sign on there is nothing there. All the references inside NCOP11 state that if it's variable by the driver that height needs to maintain 100mm while the car is in motion. It states the car is lowered lowering blocks and other types of things are acceptable. Dialling out a shock is about as 'user adjustable' as changing any other suspension component lol. I wanted to have it signed off to dissuade HWP and RWC testers to state the suspension is legal to avoid having this discussion with them. The real problem is that Police and RWC/Pink/Blue slip people will say it needs engineering, and the engineers will state it doesn't need engineering. It is hugely irritating when aforementioned people get all "i know the rules mate feck off" when they don't, and the actual engineers are pleasant as all hell and do know the rules. Cars failing RWC for things that aren't listed in the RWC requirements is another thing here entirely!
    • I don't. I mean, mine's not a GTR, but it is a 32 with a lot of GTR stuff on it. But regardless, I typically buy from local suppliers. Getting stuff from Japan is seldom worth the pain. Buying from RHDJapan usually ends up in the final total of your basket being about double what you thought it would be, after all the bullshit fees and such are added on.
    • The hydrocarbon component of E10 can be shittier, and is in fact, shittier, than that used in normal 91RON fuel. That's because the octane boost provided by the ethanol allows them to use stuff that doesn't make the grade without the help. The 1c/L saving typically available on E10 is going to be massively overridden by the increased consumption caused by the ethanol and the crappier HC (ie the HCs will be less dense, meaning that there will definitely be less energy per unit volume than for more dense HCs). That is one of the reasons why P98 will return better fuel consumption than 91 does, even with the ignition timing completely fixed. There is more energy per unit volume because the HCs used in 98 are higher density than in the lawnmower fuel.
    • No, I'd suggest that that is the checklist for pneumatic/hydraulic adjustable systems. I would say, based on my years of reading and complying with Australian Standards and similar regulations, that the narrow interpretation of Clause 3.2 b would be the preferred/expected/intended one, by the author, and those using the standard. Wishful thinking need not apply.
×
×
  • Create New...