Mazda Rotary Club

General => General Technical => Topic started by: ch1ll1 on April 13, 2004, 10:10:02 PM

Title: RX7 TURBO II 1990 (cab)
Post by: ch1ll1 on April 13, 2004, 10:10:02 PM
HI, IM NEW TO THIS ,
got hold of a rx7, what a car!,
but im not sure if i have a mojor problem ?
when im driving the car its fine but when i back off alittle on the revs, there is a slight miss fire(or sounds like a miss, not 100% sure its a miss fire),
is it a prob?
has anyone had this?
or do i need to get my hand dirty?
yours chilli:wave
Title: RX7 TURBO II 1990 (cab)
Post by: Gman on April 13, 2004, 11:28:38 PM
Does it sound like a pop?
Title: RX7 TURBO II 1990 (cab)
Post by: sadgoth on April 14, 2004, 09:42:00 AM
Welcome to the wonderfule world of RX7 ownership!!!

Does the car have a) fuel cut defencer and b) straigh-thru exhaust? If so it may be unburnt fuel in the exhaust igniting. Just a though, I\'m not that technical and it isn\'t something mine does as I haven\'t got an FCD yet.
Title: RX7 TURBO II 1990 (cab)
Post by: ch1ll1 on April 14, 2004, 02:02:36 PM
its got a straight through stainless exhaust, not sure about any thing else, its more like a pop than a miss,as you can not feel it
yours paul
:reallymad
Title: RX7 TURBO II 1990 (cab)
Post by: sadgoth on April 14, 2004, 02:23:02 PM
check to see if there is an FCD. it\'s also worth checking to see if the exhaust flames when you come off the throttle, another sign that the Fuel Cut Defencer is working.
Title: RX7 TURBO II 1990 (cab)
Post by: ch1ll1 on April 14, 2004, 08:17:41 PM
how do i now if i have one?
where is it?
what does it look like?
sorry about this?
cheers :reallymad
Title: RX7 TURBO II 1990 (cab)
Post by: scooby_si on April 14, 2004, 09:20:48 PM
i may yet be corrected but as i understand it FCD is & will be a bolt on or rather wired into yer ECU, least it was on me FD, but i am not a fan as it\'s IMO a solution to symptom & not problem of issues like overboosting
As i say just my limited understanding.......&er dunno where ECU is on T2
Si
Title: RX7 TURBO II 1990 (cab)
Post by: ch1ll1 on April 14, 2004, 09:24:47 PM
thanks for the reply!,
not sure where it is either!,

the poping is more like a miss fire! but only when i back off or drive very slow (or steady )
but if i press the loud pedal and back off its ok again for abit, and again and again
any thoughts:confused:
Title: RX7 TURBO II 1990 (cab)
Post by: ch1ll1 on April 14, 2004, 09:27:22 PM
also it does not dack fire!
Title: RX7 TURBO II 1990 (cab)
Post by: scooby_si on April 14, 2004, 10:09:08 PM
does sound just like a little pop from fuel getting burnt in zaust so not necessarily a full banging 2 foot flame out of the end but still a fruity pop
Sub section 24b (http://www.stopstart.freeserve.co.uk/smilie/deal.gif) In my totally ignorant & none expert dont take my word for it if in any doubt or worried get sum1 who knows what they\'re talking about but dont sound too much to worry about unless you dont like the popping, although as i say not a fan of FCD myself so may wana check what the full story is i guess....
Si (uh oh dont believe me just incase )
Title: RX7 TURBO II 1990 (cab)
Post by: richrx on April 14, 2004, 10:33:23 PM
a FCD is under the bonnet on the FC, on the right hand side about 1/2 way down. its a cube shaped thingy but 2 inches in size, with 2 or 3 wires coming out of it and plugging into another thingy. when i saw one it wasnt strapped in just lying loose so its fairly obvious to spot.

as you can tell i\'ve only seen one once so the description is v.poor:D sorry

ok its someone elses chance to sound daft, i\'ve somehow up staged SI:eek: :eek: :eek: :eek:

rik