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Backfire Whiplash

Yme33
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Yme33 Enthusiast

Yme33

Posted
Posted (edited)

Here we go again did a search and found out backfiring between gear changes.

Looking at getting my first R33 fresh import.

Took it for a testdrive and warmed up the engine to normal operating temp, and you give it a bootfull and your head learches forward like you hit reverse gear, and than wham ya head gets ripped back into the seat like whiplash almost. Dosnt matter what rev range you do it.

Sometimes it will do a backfire on aceleration and a huge cloud of black smoke comes out of the exhaust (still has jap fuel in it not sure if it is this).

Get this lifted the bonnet and found a hose 3/8 size lying their not connected to anything (around turbo area) could this be the problem??????, hope so as this is a nice car for the price and i got to see and drive before it was complianced and detailed (still had those hard jap tyres on it, pretty much straight of the boat).

Thanks

Edited by Yme33
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https://www.sau.com.au/forums/topic/165993-backfire-whiplash/
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bubba Grand Master

bubba

Posted
Posted

Umm that hose is probably meant for the wastegate actuator. Sounds like you're hitting Rich & Retard (fuel cut), if that hose is indeed meant for the actuator then the turbo will be spooling uncontrollably, making way too much boost which will cause the ECU to read an overvoltage from the AFM and throw itself into R&R.

If that is the case, my guess is the car had an electronic boost controller which was removed by a complete monkey :P

EVILTD Collaborator

EVILTD

Posted
Posted

It sound as if the fuel injector are either pumping too little or too much petrol... I would check the fuel pumps... I had this problem before... changed fuel pumps and it runds fine now... also, remember to use high octane petrol... if you running anything but high octane petrol it will hinder performance heaps...

good luck bro... try this and then tell me how you go...

bubba Grand Master

bubba

Posted
Posted

I dont think he has wound the boost up, I think it's more a case of his wastegate actuator isn't connected to anything (the loose hose he found) and is boosting uncontrollably. I'm not sure where the 33 gets it's pressure signal from.. pretty sure it's different to my 32 which has the pressure nipple on the compressor housing.

bubba Grand Master

bubba

Posted
Posted

That's what I'm trying to say :( Someone needs to tell him where exactly the wastegate actuator hoses go so he can check if that's what the loose hose is.. I have a 32 so I can't tell him as I don't have the dual stage solenoid etc etc.

smurf80 Experienced

smurf80

Posted
Posted

If its been disconected for a while and it is the hose im talking about it means that whole time its been running unlimited boost. It may have done damage it may not have, it depends on the driving habits of people using the car while its been in this state. Get it checked out before you hand over your hard earned cash.

gts-4 dreamer Mentor

gts-4 dreamer

Posted
Posted

what is with this term "fresh import". they are second hand cars.... they were just driven in jp and new to aus... what ... people in jp dont thrash thier cars..... so wierd people talk about fresh imports as if they are new cars... particularly car salesmen eh

Yme33 Enthusiast

Yme33

Posted
  • Author
Posted
what is with this term "fresh import". they are second hand cars.... they were just driven in jp and new to aus... what ... people in jp dont thrash thier cars..... so wierd people talk about fresh imports as if they are new cars... particularly car salesmen eh

I know they are second hand but it is tuffer for a frsh import to get complianced than the dodgy road worthy off that guy for a carton of beer

smurf80 Experienced

smurf80

Posted
Posted
what is with this term "fresh import". they are second hand cars.... they were just driven in jp and new to aus... what ... people in jp dont thrash thier cars..... so wierd people talk about fresh imports as if they are new cars... particularly car salesmen eh

When people use the term "fresh" they generally mean its fresh to australia not that its a brand new car.

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