my rx-7

[Iain C]

The decat might be the reason for some of the backfire.
Change the plugs and leads mate..
Mine is having a job with hi revs too and i think i have the same problem.

[mikeyh]

ordered plugs and leads today.
just go tthe standard leads just now and if that works im going to go for the better ones(mags or who ever else does them)

does seem to be when engine`s hot so might just be a leads breaking down(hopefuly)

[leggysrx7]

Mikey,

I could come through on friday to give you a hand if your plugs/leads arrive

I\'ve sent you an email

Marc

[MillSpeed]

90-100psi is 6.2-6.9bar which isn\'t bad, should be fine for a while. I\'d defo try to source a cat from somewhere just to eliminate the possibility of the de-cat upsetting things. There are a few of the metal pipes in the rat\'s nest which aren\'t used, they\'re for automatic and US spec cars which have got extra stuff on the engine. A bit of smoke/soot is probably to be expected since you\'re de-catted, althought it does sound like you\'re running rich. Is your air pump still connected? Mine would chuck all kinds of sh*t out of the exhaust when I first got it, found out the air-pump wasn\'t connected. Made it idle smoother too. With any luck, the new leads will help a great deal, what were your plugs looking like when you took them out?

[mikeyh]

ok ill try to get a hold of a second hand one(ANYONE GOT ONE).
or i might try get a second hand power commander.plugs didnt seem that bad but been in since 11/05.
you say air pump where and what is that?
ive got it booked into star performance next thursday to see what fuelings like.

[leggysrx7]

good company to use in Scotland is \'The Garage\' in Wishaw, top mechanic and owner is Marc Light.

Website is //www.the-garage.co.uk, phone number on there. Wealth of knowledge and experience with rx7\'s

Marc

[mikeyh]

silly quesion but its not your garage is it?
lol just noticed you have same name

[MillSpeed]

You\'ve got a Power FC? Brucie Bonus! Still, god knows what kind of map you might be running......this might be why the ignition\'s breaking up. Add a stock ECU to your shooping list just to eliminate any issues there might be with the Power FC. They can be had on ebay for as little as a tenner. You can always pop the PFC back on later when you\'re done a few mods and you\'re ready to get it mapped properly. The air pump sits on the left hand side of the engine (looking from the front of the car) and is belt driven by the crank. It\'s got a little clutch on the drive pulley (like on an air-con compressor) and switches off above ~2000rpm. It pumps air down to the cat via the Air Control Valve (ACV) which is connected to the Lower Inlet Manifold (LIM). Chances are if you\'re running a PFC and de-cat, the air pump might have been removed.

[mikeyh]

ive not got a pvc fitted(dont know where that came from)
im in 2 minds whether to get one or a cat.my exhaust system has a huge 3.5 maybe more pipe directly from the down pipe(which i have a brand new stainless steel one to replace).

everythng else on the car is standard so mmmm not sure

took it for a run just now drove good but didnt have the go that every boody says theirs does.

think ill wait till friday for leggy to pop across and see what he thinks.

[MillSpeed]

Ah ok, it\'s just when you said you were gonna try to get a commander I immediately assumed you already had the APEXi Power FC fitted. I suspect that stainless downpipe will be for a LHD car and won\'t fit a RHD RX7 without modification. Is it flattened out towards the end that bolts to the turbo pack?

[mikeyh]

lol im good and leathal with the buring torch.

think il do a search see if anyone`s got a second hand pfc or ind a good deal on one.
would it not having a cat slow it down?
the pipes under the plenum are just straight throughs so no worries there.
seee what you all mean about the rats nest thing looks fun(just make sure not to remove all those pipes).

so looks like engines not ready to give up yet might just be electric or exhaust related.

if i go for a pfc i take it its best to maybe get induction kit and other after market bits at the same time.saves remapping every time i fit new bits.

not going to go mad on the engine mods happy with the engine just now(well once its running abit better)

what do you all recommend to add on?