Jump to content
SAU Community

Car Sounds Like A Wrx ... How Do I Stop This?

PSIKO

By PSIKO,
in Engines & Forced Induction

 Share

Recommended Posts

PSIKO Mentor

PSIKO

Posted
Posted

Hey guys,

Earlier tonight my car (which had been driving absolutely perfectly) all of a sudden started running like absolute crap, and what I can best describe as sounding like a WRX.

I limped the car home (50kms, sigh), and it seemed to only do it once the car had come up to temperature from that point on.

I am not sure whether it is the fuel filter, I haven't really changed it since I swapped to e85, though in saying that I haven't had much of a chance to drive it much

Modifications which would have an impact are:

  • RB26DETT
  • ViPec ECU running MAP
  • Running on e85
  • New spark plugs within the last couple of weeks
  • -5 turbos, full aftermarket exhaust
  • Splitfire coils (probably less than 1,000km's on them)
  • Metal headgasket with ARP headstuds freshly put in within last week or so

I've only just had it put together, and was dyno'd last week and was fine there

A mate noticed when I pulled out of the car park he thought he saw a puff of smoke but couldn't see what colour it was but thought it might be white (with nothing else after that initial small puff), perhaps ethanol perhaps something else?

A niggly problem that I have with the car is the electrics - there's a circuit breaker (180 amps or something large) which seems to sometimes prevent me from starting the car up (this happened tonight too) - could this have an impact, as there's not enough voltage going to coils or anything like that?

If anyone could suggest anything, that would be greatly appreciated.

Of course I'll be contacting the tuner, but just to get some initial ideas in case it's something easy like a fuel filter (which I will also be replacing)

Cheers!

iruvyouskyrine Grand Master

iruvyouskyrine

Posted
Posted

Running on 5 cylinders. Did you wash the car recently? Most common issue is water sitting in around the coilpacks, or your coilpacks could be on the way out.

Leave the car running rough and disconnect each coil pack one at a time until you hear no difference in sound. That's the dud one.

Sinista32 Grand Master

Sinista32

Posted
Posted

Agree with running on 5 Cylinders

Could be anything that's associated with stopping that cylinder from firing or firing at the correct time

process of elimination starting with the method above

PSIKO Mentor

PSIKO

Posted
  • Author
Posted

Cheers for the replies guys,

Yep car has been washed recently - however is it odd that it would suddenly start doing it, and across the full rev range, if it was from water from a recent wash?

Will test the cylinders this weekend as you both suggested

Badgaz - doubt it's intercooler as it's not running MAFs, cheers though

Thanks fellas

Blackkers Experienced

Blackkers

Posted
Posted

I dropped an injector once and it ran on 5 cylinders. Sounded like a wrx too, rough when driving and idling. But on deceleration the engine felt smooth again. So in gear above ~2k rpm with 0% throttle the engine felt smooth. That's how I knew it wasn't an internal engine issue

Maybe give that a go if you're worried. I suspect coilpacks or plugs

iruvyouskyrine Grand Master

iruvyouskyrine

Posted
Posted

You wouldn't believe how many times I have seen this after people was their car. But yeah pulling the clips off the coilpacks and injectors progressively is an easy and almost guaranteed way of fault finding the problem.

Good luck :)

Badgaz Experienced

Badgaz

Posted
Posted

Cheers for the replies guys,

Badgaz - doubt it's intercooler as it's not running MAFs, cheers though

Thanks fellas

So your map sensor, iat sensor and tps are reading correct? Can you data log on your ecu?

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

    • Wazmond
      Stock rb25det neo questions

      By Wazmond · Posted

      Hows your intake piping? Are you still running stock? Having in the stock AFM position would mean, if the BOV was shut/venting out, it'd create the almost stalling kind of effect right // "the rich pulse behaviour" due to MAF thinking air is flowing ? But this would be better than having the bov in the stock position + MAF on/just before cross over piping right?
    • GTSBoy
      Stock rb25det neo questions

      By GTSBoy · Posted

      Essentially, yes. Although I wouldn't put the AFM on the crossover pipe. I'd want to put it into what amounts to the correct size tube, which is more easily done in the intercooler pipework. I bought a mount tube for card stile AFM that replaces the stock AFM - although being a cheap AliExpress knockoff, it had not flange and I had to make and weld my own. But it is the same length and diameter as the stock RB AFM, goes on my airbox, etc etc. I don't have a sick enough rig to warrant anything different, and the swap will take 5 minutes (when I finally get around to it and the injectors & the dyno tune).
    • Wazmond
      Stock rb25det neo questions

      By Wazmond · Posted

      So to summarise, the best thing to do is to move recirc to between turbo and IC, and maf on the crossover pipe. Meaning I'd need a recirc flange, drill a hole in the piping on turbo outlet area. And drill hole on crossover to fit/weld maf sensor? Either that or put the MAF on the turbo inlet right?  Is an aftermarket recirc/blowoff valve recommended? Do currently have family in Japan so could probably bring something back with maybe a cheeky lil SuperAutobacs run?
    • tsuokun
      Lets play a game - What is causing my oil consumption?

      By tsuokun · Posted

      Yep, so far most have said that it looks like corrosion on the wall from piston not moving. Which then has probably damaged the oil rings and caused those vertical marks. The longest the engine was still after the rebuild, was the winter of 2018 - 2019, plus the boat trip to Japan. When I shipped the car, it had normal gas in the tank but before that winter pause, it had E85 in tank.  In any case, even if either one of those was the cause, it happened close to 6 years ago and the car has been driven something like 30 000kms after the fact. Again, apart from the plugs and the dip stick, there is nothing in the way the car runs that would indicate what has been going on in the engine. I am going to consult a shop and ask their opinion, what would be the best approach. I do have some access to a garage I could use to diagnose further myself, but time is very restrictive. Might end up buying another engine that could be used while this one is being remedied. Without pulling the head, it will be impossible to find out if it needs another bore, but here's to hoping a hone would suffice.  Goddamnit, I would really have preferred this not happening.  
    • 25RBGT
      Got this r31 silhouette flood car to rebuild.

      By 25RBGT · Posted

      Boot is going to be replaced eventually. I just wire brushed what I could and rust converted. Then painted in rust kill primer. the spoiler also got repainted and plugs replaced on the ends. The under side of the bonnet is going to be black also, currently white. But red on the top side, same colour code as the silo to begin.
×
×
  • Create New...