Jump to content
SAU Community

Rb25 Won't Run With Afm Plugged In

Simon-S14

By Simon-S14,
in Engines & Forced Induction

 Share

Recommended Posts

Simon-S14 Grand Master

Simon-S14

Posted
Posted

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
Simon-S14 Grand Master

Simon-S14

Posted
  • Author
Posted

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?!

Dan_J Veteran

Dan_J

Posted
Posted (edited)

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
DVS JEZ Grand Master

DVS JEZ

Posted
Posted

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

Simon-S14 Grand Master

Simon-S14

Posted
  • Author
Posted

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • MBS206
      Tein Circuit Master- rebuild worth it?

      By MBS206 · Posted

      If they can dyno them, get them dyno'd, make sure they're not leaking, and if they look okay on the dyno and are performing relatively well, put them in the car.   If they're leaking oil etc, and you feel so inclined, open them up yourself and see what you can do to fix it. The main thing you're trying to do is replace the parts that perish, like seals. You're not attempting to change the valving. You might even be able to find somewhere that has the Tein parts/rebuild kit if you dig hard.
    • MBS206
      Best place to order Authetic R32 Parts in Japan

      By MBS206 · Posted

      Can you also make sure the invoices on the box (And none exist in the boxes) are below our import duty limits... I jest, there's nothing I need to actually purchase and order in. (Unless you can find me a rear diff carrier, brand new, for stupidly cheap, that is for a Toyota Landcruiser, HZJ105R GXL, 2000 year model...)  
    • MBS206
      NC MX5

      By MBS206 · Posted

      Murphy strikes again! Nothing at all would have gone wrong if you had the tool kit in the car! You'd have just found the clamp loose the next time you went to touch it...
    • MBS206
      Blue slip

      By MBS206 · Posted

      I have been being VERY quiet about what you're alluding to, as it is something that ticks me off... The number of cars from factory that run coil overs is HUGE! Most of them these days do... The other part that annoys me, is people saying "Well all the incabin adjustable suspension is illegal by blah blah blah"... If that's the case, then why can I buy a car brand new that can do it if, FULL STOP in cabin adjustable suspension is illegal...   Also, I could just chuck some aftermarket shocks in my car, throw the stock springs on, after my blue slip, dump my super low springs back in. Same shock and spring style setup... Hell, they could also be the same colour springs etc.     I'm voting, BlueSlipper didn't want to touch the above car for some reason. Whether it be some sort of bias against the car, the owner, them maybe having previously done dodgy shit and now they're being super careful in case they get slapped in the face by the Gumbyment again... Find a new blueslip place.   And can confirm as you had said, yes there are holy bibles of vehicle heights, and all sorts of other suspension stuff. Heck your run of the mill mechanic, and tyre shop has access to all of that stuff. It's how they do wheel alignments...
    • The Bogan
      NC MX5

      By The Bogan · Posted

      Funny story Heading to Sydney this morning on the HWY there was some slow traffic, so I gave it the beans and midway through my overtaking "power run" I lost all power It seems that I missed a hose clamp,  and the MAF and filter went WiFi To make this more problematic, the little tool kit that lives in the boot, is sitting in the sun room at Goulburn......LOL Luckily for me I found a bit of steel on the side of the road that could be used like a rusty and bent flat head screw driver to tighten it up enough that it got me into Sydney, it is now all tight like a tiger with the aid of a 8mm socket Note to self: Use my brain and double check stuff, and always keep that little tool kit in the car for when I have a brain fart
×
×
  • Create New...