Flat spot on Kuro 2

[30405]

It helps heat the cat up on start up. I don't think it would do any damage to the cat so long as you make sure it gets hot in other ways (beep, beep) to burn of residue.

Once gone you'll need to map the engine light code out other wise it pops up every couple of starts. I can do that for you when we are freeeee

[goodeggbob]

Are there any performance,economy or longevity gains to be had by deleting air pump?

[SmuttyHutty]

Yes Alistair,i have piccies of the one i removed but will have to wait for my lad to upload them,being the dinosaur that i am.
As a matter of interest,what air the gains from having air pump delete,apart from weight and space? . As i managed to not break anything,i now have the choice of either or,instead of being forced into it, and is it true that you would only do a delete if running a decat,thanks,rob.

That would be great.

I may be able to upload pictures but I don;t have the skill to remove an SSV,

Just watched a couple of YouTube videos of it and am wondering if I ought to ask BigPete to pop the SSV out and clean it when I go and see him to fit the COF in the next month or so on my 192. If the air pump and other parts will need to be removed for the COF then it makes economic sense to ask him to do this at the same time.

[qwakers]

Are there any performance,economy or longevity gains to be had by deleting air pump?

no measurable ones as far as i can tell...

however, one of the side effects is you can have the cold start map leaned out a lot, which makes it almost impossible to flood...

[goodeggbob]

It makes no difference to how the engine runs, after the first few minutes after a cold start, or at any other time.

It could potentially help reduced internal wear by avoiding the rotary equivalent of "bore wash", if you could also prevent the over-rich mixture that's injected to produce the excess fuel that mixes with the secondary air in the cat.

However, the only related re-maps that I've seen are aimed at just suppressing the CEL's from the missing air pump, and the change of O2 sensor output expected.

In theory it could shorten the life of the cat, if you did a lot of cold starts, as it would not only not get the benefit of the pre-heat but it would be poisoned by the unburnt fuel.

Personally I would only do a SAS-delete if it was possible to the job completely; that is remove the hardware and the PCM behaviour that was using it, rather than just removing the hardware and suppressing the error codes.

[mrspiller]

It makes no difference to how the engine runs, after the first few minutes after a cold start, or at any other time.

It could potentially help reduced internal wear by avoiding the rotary equivalent of "bore wash", if you could also prevent the over-rich mixture that's injected to produce the excess fuel that mixes with the secondary air in the cat.

However, the only related re-maps that I've seen are aimed at just suppressing the CEL's from the missing air pump, and the change of O2 sensor output expected.

In theory it could shorten the life of the cat, if you did a lot of cold starts, as it would not only not get the benefit of the pre-heat but it would be poisoned by the unburnt fuel.

Personally I would only do a SAS-delete if it was possible to the job completely; that is remove the hardware and the PCM behaviour that was using it, rather than just removing the hardware and suppressing the error codes.

That’s interesting
Cheers


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[350matt]

Are there any performance,economy or longevity gains to be had by deleting air pump?

no measurable ones as far as i can tell...

however, one of the side effects is you can have the cold start map leaned out a lot, which makes it almost impossible to flood...

I could be wrong but I think that map isn't available in Mazda edit sadly as I went looking for it after I removed my air pump

happy to be proved otherwise though

[warpc0il]

There's "cold start" as in "starting the engine when it hasn't been running" and "cold start" when the ambient is sufficiently low to engage the Secondary Air System; the latter is a special case which is why you only normally hear the pump running on winter mornings.

[goodeggbob]

Hello all,went for a blast this morning and full power is now resumed,goes like stink. The only issue is a small coolant leak by the stat somewhere,hardly surprising given the amount of hoses in there. The upside is,i now know in which order to do things to get to it quickly.
Annoyingly i was toying with using jubilee clips but i realised i hadn't got enough to complete so used the spring clips again.

[SmuttyHutty]

Hello all,went for a blast this morning and full power is now resumed,goes like stink. The only issue is a small coolant leak by the stat somewhere,hardly surprising given the amount of hoses in there. The upside is,i now know in which order to do things to get to it quickly.
Annoyingly i was toying with using jubilee clips but i realised i hadn't got enough to complete so used the spring clips again.

Found this online last night - I am sure the doc is available in our archive but this was just stumbled upon.

Mazda_RX8_FE_TSB-01-019-08.pdf

[PaulAV]

I found the spring clips next to useless on the old hoses, I used decent jubilee clips when I changed my radiator, found I didn't have 1 big enough, so joined 2 together far more secure than the spring clips(which are essentially single use items)

[SmuttyHutty]

I found the spring clips next to useless on the old hoses, I used decent jubilee clips when I changed my radiator, found I didn't have 1 big enough, so joined 2 together far more secure than the spring clips(which are essentially single use items)

https://www.ebay.co.uk/itm/9pc-Hose-Cla ... SwwpVcx0gq

[PaulAV]

I think I used 36mm jubilee clamps joined as I had a bag of 10

[goodeggbob]

This is what i found whilst i was trying to remove it. I actually got it to turn freely, But decided to replace it anyway with a spare that i had cleaned up previously. By removing it completely it gave me a chance to clean up the bore as well. Hope this helps.
Rob.

[SmuttyHutty]

Eurgh! Did you use an engine degreaser to clean it?

[PaulAV]

What sort of mileage is on the car Rob?

[goodeggbob]

The mileage is unknown on the engine as it was a donor bought to ressurect Kuro 2. Being parked up for a while hasn't helped though.