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R33 Gts25T Popping Under Hard Acceleration

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LR33 Rookie

LR33

Posted
Posted

Hi all.

Just gave my 93 R33 a run at full throttle from about 60 kmph and it started "popping"

93 R33 gts25t

Only mod is turbo back full exhaust .

Standard boost, no pod.

The popping sounds the same as when it changes gear under heavy acceleration. It started around 5-6000 rpm and lost all power while it was happening.

Could it be?

A, fuel cut.

B, Detonation.

C, Faulty wast gate / Std Bov

I would love some opinions and to hear from anyone who has had this issue and fixed it.

Thanks all.

LR33 Rookie

LR33

Posted
  • Author
Posted

Hi all.

Just gave my 93 R33 a run at full throttle from about 60 kmph and it started "popping"

93 R33 gts25t

Only mod is turbo back full exhaust .

Standard boost, no pod.

The popping sounds the same as when it changes gear under heavy acceleration. It started around 5-6000 rpm and lost all power while it was happening.

Could it be?

A, fuel cut.

B, Detonation.

C, Faulty wast gate / Std Bov

I would love some opinions and to hear from anyone who has had this issue and fixed it.

Thanks all.

Also it didnt happen anywhere near as much if I accelerated slowly to full throttle still did a couple of pops but held its power.

LR33 Rookie

LR33

Posted
  • Author
Posted

Yup you got it. Exactly the same.

Ill start working on the electrical side as soon as i have done the fuel pump.

I changed the filter and it helped a little.

Its going to go something like this,

Fuel Pump, injectors and the things that they include..

then ignition side coil pack, leads plugs.

Im not looking to make it a rocket ship it will just be nice to have it running at full capacity.. (foot to floor no issues)

cabramatta Community Regular

cabramatta

Posted
Posted

Check your FPR, pull the vac line off it and have a sniff.. If it smells like fuel, then it's a faulty FPR.

I had the same problem as you, but my issue was contaminated fuel..

Could also be a faulty pump.

By the way, do you have a larger pump ? Say a 040 ? If so, they hate 1/4 tanks of fuel lol (well mine does anyway) and it surges on boost..

LR33 Rookie

LR33

Posted
  • Author
Posted

Firstly im going to get the std pump to 12 v so its running at full pressure and see if that makes a difference. After that ill fit the 040 as the DIY topic explains.

I take it "FPR" is Fuel Pump Return line?or something to that description?? The one that runs from the engine back to the tank past the filter??

  • 3 weeks later...
drew23 Newbie

drew23

Posted
Posted

had similar problem after fitting 3" hi flow cat. changed plugs to iridium and reduced gap slightly 0.9 mm i think, smaller gap better when combustion pressures are higher as fuel harder to ignite. gave coil packs a good clean as there was carbon around them. ran fine then. drew

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