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Messages - Skifledanabit

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16
2nd generation RX-7's / Re: Boost issues
« on: June 16, 2016, 06:18:23 PM »
I just swapped the AFM unit out for another one and left the car to warm up. Turbo is coming on and the car is revving nicely. I decided to go for a quick boost test drive.


It was boosting beautifully, no hunting, no power loss or juddering, no over fuelling, just a good drive. Until halfway up the road...



Limped it home, then took that video. On very light throttle and no turbo, it revs up but as soon as I try and actually get the turbo spooling, it just chokes up and splutters.

So it's not the AFM, I don't think it's a vacuum issue;
could the turbo be naff?
Exhaust blocked?
I'm just unlucky with cars?


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17
2nd generation RX-7's / Re: Boost issues
« on: June 15, 2016, 06:07:31 PM »
Yep, often electrical faults do that, could be the sensor circuit rather than the sensor itself etc...

It is certainly worth checking all the connections... also try disconnecting the MAP and see if the behavior is the same, would give you a clue if that is causing the issue.

Is there a MAP sensor?... the boost gauge does not seem to be responding with your throttle movements as I would expect?

If the MAP was not faulty it might be OK under high vac (low throttle) but not under lager throttle positions...

Could the sensor deteriorate over a short amount of time? Such as be fine for half an hour, then play up, then be OK after restarting but quickly fail again? It certainly has a sensor behind the air box but which type of sensor it is, I'd need to check the manual.


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What should I expect? Smoother running? Worse?


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18
2nd generation RX-7's / Re: Boost issues
« on: June 15, 2016, 06:05:56 PM »
Sounds like you already have access to a manual but just in case you didn't know, we have a link to all manuals in the general and technical area.

Real weird one this one, almost sounds like something on the intake side collapsing and blocking the intake when the engines hot as this would give the same symptom you describe.

 http://mazdarotaryclub.com/forum/index.php?topic=66749.0

Yep, got the Haynes and the service manuals.


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19
2nd generation RX-7's / Re: Boost issues
« on: June 15, 2016, 01:19:18 AM »
Is there a MAP sensor?... the boost gauge does not seem to be responding with your throttle movements as I would expect?

If the MAP was not faulty it might be OK under high vac (low throttle) but not under lager throttle positions...

Could the sensor deteriorate over a short amount of time? Such as be fine for half an hour, then play up, then be OK after restarting but quickly fail again? It certainly has a sensor behind the air box but which type of sensor it is, I'd need to check the manual.


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20
2nd generation RX-7's / Re: Boost issues
« on: June 15, 2016, 01:16:03 AM »
Doesnt sound like ignition braking down...could i suggest fuel stavation?
Dont know anything about the fc but the principles are the same on all engines...
If youve got a good spark then id be looking at fuel pump next.

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If anything it's over fuelling. It's chucking out a lot of fuel, with a hefty smell too, even at idle.


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21
2nd generation RX-7's / Re: Boost issues
« on: June 15, 2016, 01:14:27 AM »
Clive, I've gone through and replaced accessible vacuum pipes with silicone, I couldn't find any damage on any of them. However, do UK FCs have charcoal canisters? There's a pipe coming from the bottom of a charcoal canister looking cylinder on the passenger side of the engine bay, up by the bulkhead and this pipe isn't attached to anything, I think it's a fuel vapour dump.


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22
2nd generation RX-7's / Re: Boost issues
« on: June 15, 2016, 01:10:58 AM »
It's progressively gotten worse. I drove it down from Stirling with just TPS issues, juddering when off throttle etc. The next time I took it out it lasted about half an hour before it started doing as such in the video, the time after that it was about 10 minutes after warm up, then the final time was that video I've posted which was as soon as it was warm if not before.


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23
2nd generation RX-7's / Re: Boost issues
« on: June 12, 2016, 08:50:01 PM »



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24
2nd generation RX-7's / Re: Boost issues
« on: June 12, 2016, 08:48:04 PM »
You'll want to try turning up the volume because the microphone was compensating. But essentially, when I put my foot down, it won't go past that point. Only time it revs up is if I only put slight pressure on the accelerator.


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25
2nd generation RX-7's / Boost issues
« on: May 19, 2016, 08:12:29 PM »
Hi all,

Just finished at Essex Rotary where Aston spent a few hours doing the TPS on my vert.

I was getting the usual TPS issues, bucking/backfiring/poor idle/etc which have now actually been sorted.

But there was a second issue, when fully warm I will try and boost and it will just not go, it will loose power, backfire and rumble, wouldn't accelerate unless under very light pressure on the pedal, even when the clutch is down it just won't accelerate. It's as though the turbo just says "nope".

Anyone experienced this? Found out what's wrong? It's not the TPS, not the turbo, what is it? I'm flummoxed.


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26
2nd generation RX-7's / Re: How many left
« on: May 19, 2016, 08:06:04 PM »
G88 HCW is now in my possession, red 1989 FC Convertible.


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27
3rd generation RX-7's / FD Wishbone dimensions?
« on: December 03, 2015, 05:23:14 PM »
I know this is a long shot, but could anyone measure their wishbones from bolt hole to bolt and the width please? Or if anyone knows of a technical drawing of one already?

28
2nd generation RX-7's / Re: Interchangeable Items for the FC
« on: August 25, 2015, 10:01:43 PM »
They are exactly the same as each other.

29
2nd generation RX-7's / Re: Interchangeable Items for the FC
« on: August 25, 2015, 01:22:33 PM »
Are you asking me why I'm putting FC caliper a on FD hubs? Because they aren't going on either. I'm using the FD hubs because they're the easiest to fit, I just happen to have FC bits laying about to use.

30
2nd generation RX-7's / Re: Interchangeable Items for the FC
« on: August 24, 2015, 09:38:08 PM »
The FC and FD brake setups are exactly the same.

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