POLL: Has Your engine died with less than 10k miles on it?

[Martiny]

But if Mazda are building cars that can go pop through a dodgy batch of fuel imho they want there fekin arses kicked!simple as that!

Thats a but harsh, eh?

I would suggest you read up on Octane rating, and how it leads to detonation.

[iaint]

But if Mazda are building cars that can go pop through a dodgy batch of fuel imho they want there fekin arses kicked!simple as that!

A little understanding is a dangerous thing

Most of the cars over here are Jap imports - designed for higher octane fuel then the UK market has had available until recently.  Equally, most are tuned to some degree and mapped for 98+ Octane fuel.  The more mods you have the more critical good fuel is.

As with the Tesco fuel debacle killing a number of new car from various manufacturers so our 14+ year old cars are sometimes going to be at risk from dodgy fuel.

Of course this is all speculation - it might be a cause of a few of the engine failures or it might not.

[nikp]

As with the Tesco fuel debacle killing a number of new car from various manufacturers so our 14+ year old cars are sometimes going to be at risk from dodgy fuel.

Actally, the fuel thing at tesco\'s only killed the lamda sensors due to the excess of silicone in the fuel. Big bills, yes, but not as big as a dead engine.

I don\'t think it actually affected the engine internals at all. Just killed off everyones lambda sensors very, very quickly.

[Travis]

A little understanding huh!?!on your part mate!!like i said mazda need there arse kicked!!you show me 1 supra or skyline or honda or or or or or or etc etc etc etc that has blown an engine due to a dodgy batch of petrol??!!!!!!??IMO if a car can blow an engine because of a dodgy batch of fuel then the person who built made designed the car want there fekin arses kicked...this seems to be a RX7 problem,in any other car you might see some poor performance,but i very much doubt you will be in need of a rebuild....But again its my opinion...so before the v power and ultimate...when mazda brought these rx7s there must have been a lot of rebuilds going on???if you buy a car from japan and get it set up in this country on the fuel of your choice THEN IT SHOULDNT FEKIN BLOW!!!!!IF THE FUEL DROPS AND OCTAIN LEVEL OR 2!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[iaint]

so before the v power and ultimate...when mazda brought these rx7s there must have been a lot of rebuilds going on???

Mazda sold UK spec RX-7s here with ECUs developed for the UK market.  They didn\'t sell J-Spec ECU\'d cars here (although a few of the dealerships have imported RDs from Japan.

It\'d certainly be interesting to know how UK spec FDs compare to imported models in terms of reliability and causes of problems.


Also you seem to be jumping up and down comparing standard vs modified - an almost impossible thing to do with any meaning whatsoever.  It seems that standard cars expire from age related issues (water seals or failed ancillary components).  Modded cars seem to die from either tip failure or failed ancillaries rahter than water seal failure.

As for Supras/Skylines never failing - you are kidding aren\'t you?

[Ricco_04]

I see what your saying and I agree to an extent.  There are 2 things to bear in mind in my opinion.

Quite a few people have remappable ECU\'s rather than the standard equipment.  We get mapped on what fuel we have in the tank and there is not much tolerence below this because people want to see a nice figure when it\'s all mapped so the tolerence levels are not as great as stock.

The factory cars need leeway for fuel issues because they all at some point had a warranty to cover.  The cars for the UK where mapped for 95 ron fuel so they could use this or above.  In reality there was so much more tolerence on the stock perameters that the fuel could have stayed in the tank for months and months before it ever became a problem.

The same for the jap imports but in Jap land they have a much better Octane than we do - they have 101Ron(ish) and the best we have has only recently been 99 Ron.  You can see that you are already near the edge of the tolerence level here and only need a bad batch to go over the the edge and lead to det.

[Ricco_04]

Im too slow! :rollin

[Travis]

As for Supras/Skylines never failing - you are kidding aren\'t you?

No sorry i have just sold a supra after 4 years and been around supras for years big singles etc and never seen a engine blow due to anything like this..in fact i can count on 1 hand how many engines iv heard of blowing full stop,skylines yes but not because of fuel...mostly because of oil pumps,dont get me wrong i love the rex and have just sold my single,but its a crazy thing when a bad batch of fuel can cost you a 4 grand rebuild...id like to see if anyone has a standard rex that has blown due to fuel,how can you prove this?or is it down to the tuner who maps it?or the tuner who builds it?also never heard of a engine going bang on anything other than a rex due to alarm/immob wiring :2Rolleyes...and theres the great oil debate:2Rolleyes some tuners wont warranty an engine if mineral isnt used,and some say they wouldnt use anything but fully synthetic:2Rolleyes the list just goes on and on;)

[iaint]

No sorry i have just sold a supra after 4 years and been around supras for years big singles etc and never seen a engine blow due to anything like this..in fact i can count on 1 hand how many engines iv heard of blowing full stop,skylines yes but not because of fuel...mostly because of oil pumps,dont get me wrong i love the rex and have just sold my single,but its a crazy thing when a bad batch of fuel can cost you a 4 grand rebuild...id like to see if anyone has a standard rex that has blown due to fuel,how can you prove this?or is it down to the tuner who maps it?or the tuner who builds it?also never heard of a engine going bang on anything other than a rex due to alarm/immob wiring :2Rolleyes...and theres the great oil debate:2Rolleyes some tuners wont warranty an engine if mineral isnt used,and some say they wouldnt use anything but fully synthetic:2Rolleyes the list just goes on and on;)

If you go back to my post and re-read it with a keen eye you\'ll spot that

Of course this is all speculation - it might be a cause of a few of the engine failures or it might not.

It\'s not a case of engines blowing from bad fuel BUT it is a potential risk and well worth avoiding.

It\'s very very difficult to actually pin down the reason for an engine death 100% - even if the actual failure (e.g. dead rotor tip) is obvious the cause isn\'t - could be oil starvation (could be pump, blocked line, wrong type), could be pre-det, could be mapping, could be plugs..!

All very complicated and confused!

As for the mapping/alarm/oil debates - they\'re probably eternal and equally pointless

[sadgoth]

No sorry i have just sold a supra after 4 years and been around supras for years big singles etc and never seen a engine blow due to anything like this..in fact i can count on 1 hand how many engines iv heard of blowing full stop,skylines yes but not because of fuel...mostly because of oil pumps

You also have to remember the complexity of the Supra/Skyline block (in terms of moving parts) means that it is less likely that whole block will go, (you don\'t hear about many pistons going through the block unless VERY high boost is involved) however a full rebuild of a Supra or Skybus block is A LOT more expensive.

Also, the bad fuel issue leads to detonation (which will damage ANY engine) just that the rotary is more delicate.

Let\'s compare like with like shall we? A high tuned IMPORT RX7 (still using stock Mazda apex seals) pushing 450bhp atw (so double the stock level) versus a 500 atw IMPORT Supra with stock pistons, cams, valves (stock Supras were genuinly running 290-310bhp) now lets put crap petrol (say 95 RON) in them run them at 9000 rpm and see which goes first eh? Oh sorry I forgot to mention, like with like means same rev limits too

[Travis]

You also have to remember the complexity of the Supra/Skyline block (in terms of moving parts) means that it is less likely that whole block will go, (you don\'t hear about many pistons going through the block unless VERY high boost is involved) however a full rebuild of a Supra or Skybus block is A LOT more expensive.

Also, the bad fuel issue leads to detonation (which will damage ANY engine) just that the rotary is more delicate.

Let\'s compare like with like shall we? A high tuned IMPORT RX7 (still using stock Mazda apex seals) pushing 450bhp atw (so double the stock level) versus a 500 atw IMPORT Supra with stock pistons, cams, valves (stock Supras were genuinly running 290-310bhp) now lets put crap petrol (say 95 RON) in them run them at 9000 rpm and see which goes first eh? Oh sorry I forgot to mention, like with like means same rev limits too

sorry mate but theres people who have had 2 rebuilds plus on there rex,dont quite understand your point with taken rev limits to 9000rpm,in 99.9%of cases a rex engine will blow before a supra thats a fact!!...skylines yea fair enough all i was doing was proving a point by saying,its not common for a skyline engine to blow though something simple as filling up at a petrol station.And yes supra engine more expensive to rebuild BUT THEY NEVER FEKIN DO NEED REBUILT!!!!!!thats my point,Iaint is right totally!!theres too many things to consider or a mixture of things before just blaming fuel.

[shaunwil]

ok, we understand that the supra engine is stronger. But remember the rotary is a more fragile engine that will show excellent results from very little money. You can\'t PP a supra engine at home
Plus a 3rd gen rx7 weighs almost 500kg less and a similar powered supra doesn\'t stand a chance on the 1/4 mile with similar power.

I wasn\'t just blaming fuel in the first post, but it hadn\'t been mentioned and felt that it was a factor in the mix, not the only issue.

Sorry if this thread has gone sideways.

Half of the reason that engines go is because of all the stuff that supports them. You could quite easily rebuild the engine and just not bother checking the injectors, the fuel pump, the state of the radiator, the condition of the oil coolers, the condition of the electronics and sensors, the condition of all the other piping and supporting parts. Plus for a engine with so few moving parts the 13b usually has alot of re-usable parts.

Shaun

[Travis]

ok, we understand that the supra engine is stronger. But remember the rotary is a more fragile engine that will show excellent results from very little money. You can\'t PP a supra engine at home
Plus a 3rd gen rx7 weighs almost 500kg less and a similar powered supra doesn\'t stand a chance on the 1/4 mile with similar power.

I wasn\'t just blaming fuel in the first post, but it hadn\'t been mentioned and felt that it was a factor in the mix, not the only issue.

Sorry if this thread has gone sideways.

Half of the reason that engines go is because of all the stuff that supports them. You could quite easily rebuild the engine and just not bother checking the injectors, the fuel pump, the state of the radiator, the condition of the oil coolers, the condition of the electronics and sensors, the condition of all the other piping and supporting parts. Plus for a engine with so few moving parts the 13b usually has alot of re-usable parts.

Shaun

Yea dude agreed:yes

[Timmy]

Not to mention the ron number on the pump is min it should be ie v-power is 99 min so they allow for it sitting for a while. You are very unlikely to get dodgy fuel i doubt we will see another tesco type problem in our lives.
I think part of the problem is mazdas ecu diagnostics isn\'t that good. I got no engine check light for a faulty water temp sensor which if the light had came on would have saved my engine.
You can\'t really compare skyline and supra to rx7s they nothing alike, lets face it an rx7 is a super car, a supra is a heavy super car want to be, and a skyline is an over powered box.

[TRex]

Wow, you shook the dust off this thread didn\'t you!

 Did your engine blow and you done a search here or did a Supra/Skyline give you another pasting and you decided to blow off some steam here....
 :Thumbs-up