Jump to content
SAU Community

Car Loseing Power, Feels Like Fuel Problem?

DriftSquad
 Share

Recommended Posts

DriftSquad Experienced

DriftSquad

Posted
Posted

hey it happend again tonight!

comeing off an exit onto another highway, i gave it some juice and as i hit the straight the car started loseing power.. then back on.. then back off.. ect! it feels like when u have no fuel left in your tank! bt it was half full!!

could this be a fuel pump issue? fuel filter? also is i bad for the car to be doing this?? will it damaged it?

thanks rhett

Frink Veteran

Frink

Posted
Posted

could also be an electrical bug too.

mate of mine had a pinging problem yesterday. "usually" fuel related, right? it was actually the knock sensor wire exposed and rubbing on the firewall.

am just saying, dont rule out anything yet........ try all the little things first, and rule them out one by one. (eg. fuel filter etc...)

DriftSquad Experienced

DriftSquad

Posted
  • Author
Posted

i dont think it would be fuel filter because its only happening randomly. the car will run fine then when it startes putering.. u put your foot down more and it will keep going untill u take your fooot off n wait like 10 seconds?

CEF11E Veteran

CEF11E

Posted
Posted

Hi champ,

could be your fuel pump or air flow meter.

does it hunt sometimes while ideling. if so take out the air flow meter and give it a clean with carby cleaner. dont touch the wires just give em a good spray.

then reset the ECU by disconnecting the posative terminal on the battery while a mate keeps his foot on the brake. do this for 3 min and then reconnect the terminal and the ECU will be reset.

If thats not the problem it may be your fuel pump is on its way out. is it ever noisy?

DriftSquad Experienced

DriftSquad

Posted
  • Author
Posted

no not realy? i have already rest the ECU 2 days ago. can u use degreeser? and spray down the air flow meter?

no not wile ideling.. it wfeels like when u have no fuel left but u give it to here anyway and it chugs.

MerlinTheHapyPig Mentor

MerlinTheHapyPig

Posted
Posted

don't use degreaser to clean an afm, carby cleaner or brake cleaner

it sounds like the problem is your air-flow meter. are you using a HKS powerflow style pod filter with an oiled foam element?

What happens, is the oil from the pod filter, hits the airflow meter sensor and screws it up, you can't really fix this by cleaning it, when it happened to my car, i needed to replace AFMs (r33 and r32 gts-t afms are the same btw)

DriftSquad Experienced

DriftSquad

Posted
  • Author
Posted

so your 32 was doing the same thing?? i do have a pod filter i dont know if its oiled or not... a little to late i just cleaned it.. eeep.. i took it for a test run its working fine though??

well i cleaned the AFM so ill go for a little drive n see if it does it again.. if it does ill do the fuel filter

MerlinTheHapyPig Mentor

MerlinTheHapyPig

Posted
Posted (edited)

yeah, my 32 was doing the same thing

http://www.skylinesaustralia.com/forums/in...showtopic=74808

i just dug this up, here is my description of the problem

Someone suggested I change afm's and it solved the problem completely.

I tried cleaning it first, and this didn't fix it, I had to completely replace

hi there, i am having the same problem, and am also trying to diagnose it.

Ok, from time to time, just driving normally, it'll "hesitate" and u litterally loose all power for a split second, then it comes back on. It does this from time to time

when it's bad. it'll do it alot. (like on-off-on-off bucking you describe). and eventually u usually have to pull over.

When i pull over. revs will idle funny - like 1k - 2k - 1k - 2k - 1k - 2k back and forth for a while, and will then either settle down, or the car will stall. Although idle is jumping between 1 and 2k, it's still smooth, when you're standing still, it's not eratic. (does it do this on your car?)

Because it's idling like this, i'm wondering if it might be a Idle-control valve problem, or coolant temp sensor. The other thing i'm getting is an unusually high cold-idle in the morning - this could be unrelated however. I haven't checked for ECU fault codes, but i'll do this tomorrow morning.

I've tried removing the bov and blocking intake off with a plate, and blocking vac-line off, but makes no difference.

-Tim

If you have a friend with an r32, try swapping airflow meters

about 3 or 4 people posted later in that thread saying that they had the same problem and afm fixed it.

Edited by MerlinTheHapyPig
DriftSquad Experienced

DriftSquad

Posted
  • Author
Posted

yeah the AFM cleaning didnt work i need a new 1! it was playing up realy bad yesterday i nerly didnt make it up my hill... i noticed that if u pull over and let it idel for 10 seconds it will go back to normal for a wile... u guys niticed the same thing?

'

any 1 know where i could get a new AFM?

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

    • joshuaho96
      R34 25GT Engine Light 21

      By joshuaho96 · Posted

      No, code 21 is very straightforward. It can only be the things described in that diagnostic flow. In fact it has no way of knowing that the spark plug resistance is out of spec.
    • brillo
      Leak from Tokico BM50 Brake Master Cylinder

      By brillo · Posted

      Hi, SteveL Thank you very much for your reply, you seem to be the only person on the net who has come up with a definitive answer for which I am grateful. The "Leak" was more by way of wet bubbles when the pedal was depressed hard by a buddy while trying to gey a decent pedal when bleeding the system having fitted the rebuilt BM50 back in the car, which now makes perfect sense. A bit of a shame having just rebuilt my BM50, I did not touch the proportioning valve side of things, the BM50 was leaking from the primary piston seal and fluid was running down the the Brake booster hence the need to rebuild, I had never noticed any fluid leaking from that hole previously it only started when I refitted it to the car. The brake lines in the photo are "Kunifer" which is a Copper/Nickel alloy brake pipe, but are only the ones I use to bench bleed Master cylinders, they are perfectly legal to use on vehicles here in the UK, however the lines on the car are PVF coated steel. Thanks again for clearing this up for me, a purchase of a new BMC appears to be on the cards, I have been looking at various options in case my BM50 was not repairable and have looked at the HFM BM57 which I understand is manufactured in Australia.  
    • Gantai
      R33 GTST Steering Rack (49001-19U05) Rebuild?

      By Gantai · Posted

      PXL_20250828_063541093.TS.mp4
    • Gantai
      R33 GTST Steering Rack (49001-19U05) Rebuild?

      By Gantai · Posted

      Well the install is officially done. Filled with fluid and bled it today, but didn't get a chance to take it on a test drive. I'll throw some final pics of the lines and whatnot but you can definitely install a DMAX rack in an R33 with pretty minor mods. I think the only other thing I had to do that isn't documented here is grind a bit of the larger banjo fitting to get it to clear since the banjos are grouped much tighter on the DMAX rack. Also the dust boots from a R33 do not fit either fyi, so if you end up doing this install for whatever reason you'll need to grab those too. One caveat with buying the S15 dust boots however is that the clamps are too small to fit on the R33 inner tie rod since they're much thicker so keep the old clamps around. The boots also twist a bit when adjusting toe but it's not a big deal. No issues or leaks so far, steering feels good and it looks like there's a bit more lock now than I had before. Getting an alignment on Saturday so I'll see how it feels then but seems like it'll be good to go       
    • PranK
      R35 GT-R production ends after 18 years

      By PranK · Posted

×
×
  • Create New...