Jump to content
SAU Community

R32 GTS (RB20DE) clogged cat

GabsReDeal

By GabsReDeal,
in General Automotive Discussion

 Share

Recommended Posts

GabsReDeal Apprentice

GabsReDeal

Posted
Posted

Hey everyone,

This is my first post apart of the introduction. I tried searching a bit on the forum but couldn't really get a straight answer.

I got the car to my mechanic as I felt it being weak. It seems that it was missing on two cylinders due to the injectors. I had all my injectors clean and the car runs much better. The mechanic also confirmed my suspicions that the cat is clogged and needs to be tackled asap. The cat rattles a bit and the hot exhaust warning frequently lights up when driving after getting the injectors clean.

In my introduction I was asked about what modification I might be interested in and mentioned a cat delete. From what I was told, this is not really beneficial on the RB20DE and there are more cons than pros. 

Could perhaps anyone give some suggestions on what the best course of action would be since the current cat is toast and needs to be removed/replaced anyway?
I can also sometimes smell a strong smell of fuel, but I'm not sure if this is related.

Link to comment
https://www.sau.com.au/forums/topic/486068-r32-gts-rb20de-clogged-cat/
Share on other sites
Duncan Grand Master

Duncan

Posted
Posted

I'm not sure what sort of shops are nearby, but I'd expect any reasonable exhaust shop could put a cat in it that will not restrict the power that engine makes.

Otherwise, if you want to remove it, short lengths that replace the cat are readily available online, search for "de-cat pipes" or "test pipes"

 

  • Thanks 1
MBS206 Grand Master

MBS206

Posted
Posted

The hot exhaust light will come on not from just the cat being blocked, but it's just a temp sensor, and it's designed to warn you to not do things like park in long grass.

 

If you've been pushing the motor a bit, it can cause the light to come on.

 

Second if the cat is rattling, I'd suspect it's not blocked, but instead falling apart inside.

 

The easiest "fix" until you can get a cat put back in, is to unbolt your one, bash the rest of the insides out, and then bolt it back in.

 

For a daily driver/street car, I am in agreeance of put a cat in the car.

If it were race car I wouldn't care if it were removed. :)

  • Thanks 1
GabsReDeal Apprentice

GabsReDeal

Posted
  • Author
Posted

Appreciate the feedback. It is street car, but not a daily.

Last week I got a quote from a good exhaust shop for a decat, one which is bolt-on, bolt-off to be easily replaceable. I got quoted for around €150.

On 19/01/2025 at 3:42 AM, MBS206 said:

If you've been pushing the motor a bit, it can cause the light to come on.

I usually do push the motor, but I wasn't in this case to make sure that no damage is done until I get the cat sorted.

I think it's best to also ask the exhaust shop for the other option and see what they can do.

If (big if) I were to decat though, would it be best to tune the car or would the stock ECU handle it? As far as I know, the stock ECU is not tunable and that would require additional purchases.

joshuaho96 Veteran

joshuaho96

Posted
Posted
10 hours ago, GabsReDeal said:

Appreciate the feedback. It is street car, but not a daily.

Last week I got a quote from a good exhaust shop for a decat, one which is bolt-on, bolt-off to be easily replaceable. I got quoted for around €150.

I usually do push the motor, but I wasn't in this case to make sure that no damage is done until I get the cat sorted.

I think it's best to also ask the exhaust shop for the other option and see what they can do.

If (big if) I were to decat though, would it be best to tune the car or would the stock ECU handle it? As far as I know, the stock ECU is not tunable and that would require additional purchases.

Stock ECU has compensation, you won't damage the engine. Personally I recommend getting an acceptable catalytic converter, it doesn't need to be OEM and super expensive but a cheap universal one to keep it from being super obnoxious to be around. Decatted cars smell pretty awful.

  • Thanks 1
GTSBoy Grand Master

GTSBoy

Posted
Posted
50 minutes ago, PLYNX said:

sulphur dioxide

Nah. H2S.

H2S is "rotten egg gas", which is what is associated with no cat.

SO2 is equally nasty, and if you've ever smelt it you'll know all about it. More of a choking, acid in the back of the throat sort of thing. But you can only smell it in a narrow range up to about 1ppm. Above that, it irritates your mucous membranes, but you don't smell it.

GabsReDeal Apprentice

GabsReDeal

Posted
  • Author
Posted
On 20/01/2025 at 11:37 AM, niZmO_Man said:

Should be able to source 200 cell R32 cat... unsure how easy it would be to get it to Malta though.

Yes shipping here can be a pain, was about to purchase timing belt replacement kit, but it tends to get expensive due to shipping (and customs if importing from non-EU which the UK now falls under).

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

    • Milkmun
      NC MX5

      By Milkmun · Posted

      Definitely needs a hard top
    • Murray_Calavera
      Wiring high beams in IC7 for R32 GTR

      By Murray_Calavera · Posted

      Nah, shouldn't have made any difference. Reds on, or car running, should be same same for what you were doing. 
    • niZmO_Man
      R32 GTS (RB20DE) clogged cat

      By niZmO_Man · Posted

      Should be able to source 200 cell R32 cat... unsure how easy it would be to get it to Malta though.
    • PLYNX
      R32 GTS (RB20DE) clogged cat

      By PLYNX · Posted

      Oh bugger ! Your right ! Good old hydrogen sulfide. Takes me back to the good old school days ! 
    • The Bogan
      NC MX5

      By The Bogan · Posted

      I've owned a few scooters over the years, a Vespa PX oil burner was my first scooter, followed by a few others, including a little 50cc BeeWee that I used as a barracks bike, and I've had a blast on all of them, they really are the cheapest for of city/suburb transport around The only issue with scooters in Australia is lots of people look down on them due to their size,  maybe they need a big bike to make up for something else where they are lacking, unlike Europe and Asia where every man an their dog owns one, and now that filtering is legal in NSW, local traffic is never a issue Not to say I haven't owned my share of big cc bikes over the years, but they were for more blasting through the hills or Hwy riding where it needed to sit on Hwy speeds Safety wise, I ride like everyone is always trying to kill me, everyone is running a red, or running stop/give way signs, or generally asleep at the wheel, which most people are duringtheir commute, I also ride really safe, and give myself, and everyone else enough room in case I need to pull some hasty evasive actions, I've done a few rider training days over the years, which has come in handy on more than a few occasions  As for mods, there's nothing really, and yes your right about aftermarket exhaust, all you get is loud and obnoxious noises from them, like every 250-300 cc you hear with a aftermarket muffler, in saying this I did put a rear muffler from a 125 Aprilla on one of my old 125 scooters, it was horrendous and no amount of full face helmet and ear plugs would dampen that noise As for coming from the Harley, and what a overpriced POS that was, I no longer do big rides as my poor old busted joints ache after about 1/2 an hour of riding, long cruises are so much more enjoyable now in a car, so a big bike would be pointless   
×
×
  • Create New...