Hi guys,
Got my boost gauge fitted today.
Now, the bad news. I knew my second turbo wasn\'t working, but there seems to be problem with my primary turbo as well. I was testing boost level in second and third gear. When I reved it to 3/4 k, the boost gauge only showed 0.2 bar.......
:eek:
:confused: :confused: :confused: :confused: :confused:
any hissing noises ? might say if you have a leak?
Hissing sound??
Leak?
We did find some oil in the intake, but very very little.
Cheers
i take it you\'ve checked your vacuum hoses are all connected and none are split :confused:
:wave
Not sure if we\'ve checked all of them..... But as far as I know, there\'s no splits, loose or anything........
:( :( :( :(
maybe its an ecu problem :( you\'re best bet is probably to get it checked over by a specialist, they will be able to diagnose the problem pretty quick. :)
Thanks James. Will do.
same as I had, was a vacum hose off. It was located under the inlet manifold (looking from the front), you need to remove the black plastic box in front of the inlet (2 x 10mm nuts and slip off the 2 vacum hoses) to have a good look under the front of the manifold. have a look at my thread further down the page (boost problem one)
What rpm is the idle when warm? A high one could indicate a vac hose problem under the Intake manifold. If all is okay, listen for hissing under power (hard to do i know...)
jon
Right, dont think I\'ll have time to pop down to a garage today. No tools with me either, so probably will have to wait til weekend.
No, the idling\'s good. Hissing sound under power..... Not a easy one is it......
Anyway, well let you guys know if I get it sorted.
Thanks
If you\'re not making boost on the primary then it\'s extremely unlikely to be a vacuum line problem. Without 10psi on the primary you\'ll never get the secondary to spool period.
It\'s probably a leek on the main pipework from the turbos to the intercooler and then to the intake manifold. If you\'ve got a coupler that\'s off completely then you wouldn\'t make 0.2bar, it sounds like a split. Check all the rubber couplers thoroughly, the most likely culprit (unless you\'re running an efini y-pipe) is the rubber coupler that comes off the top of the turbo housing.
HTH
H
Did you drive the car or did you rev the engine in neutral?
0.2bar is what you get if you rev it in neutral.
No, 0.2 is driving. dont even get 0 when in neutral.
My y pipe\'s the metal one.
Cheers
p.s. Is not dangerous driving like this or is it?
QuoteIf you\'re not making boost on the primary then it\'s extremely unlikely to be a vacuum line problem. Without 10psi on the primary you\'ll never get the secondary to spool period.
As I said I had 0.2bar through the revs and it was a vacum pipe off.
Yes, you can overspin your turbos driving like this if you want to boost. Did you check all your couplers ? What about the connection from the Y-pipe to the blow-off valve ?
QuoteYes, you can overspin your turbos driving like this if you want to boost.
:eek: :eek: :eek: :eek: :eek: :eek:
What if I take it easy, would that help??
Cheers
TBH, I can only see so much in the engine bay without start taking parts off. So far, didn\'t find anything loose or split.......
mate, it\'s worth a look at what I said, it\'s free and takes all of about 2 minutes!
locate the black plastic box (which sits in front of the inlet body), it\'s held on by two 10mm bolts only, undo these and you\'ll notice the two vacum pipes on the side of the box, slip those off and you can just lift the plastic box away.
When you remove this you\'ll be able to see underneath the inlet manifold (where the majority of the vacum pipes reside). Get a torch and have a look, like I say it\'s a 2 minute job, if everything looks fine so be it, but for what it takes you may be lucky and see a pipe off like I did.
This pic shows what it looks like with the plastic box out the way. You can see the vacum pipe off of the metal pipe in the centre of the pic. This had blown off and was giving me 0.2bar through the revs.
(http://homepage.ntlworld.com/james.greenfield/pipes.JPG)
Yes, ^ is also good advice. Take off the pressure chamber, but label the two hoses if you take them off so you plug them back correctly. You will have a good luck under the UIM and can easily see if something is off.
If you take it easy, then yes, you could drive the car, but remember it doesnt take much throttle to push 10psi. Better be safe then sorry. So take off that black plastic box after the alternator (pressure chamber) and look around. Its 10min alltogether tops.
Just came back.
Cheers guys. Will do once the var\'s cooled down.
Thanks
Sorry for such a late post.
Finally got a bit of time to remove that black box(much easier than I expected).
After I removed it, I was shocked. Some how it didnt look like the pic James posted.
Will get some pics up later.
Cheers
Hi these are some pics I took.
Am I looking at the wrong place??
BTW, there is hissing sound....
Cheers
pic 2
one more
hmm, does look diferent. It\'s almost as though the solenoids (you can see the coloured plugs to them) are turned on their sides. Also you can\'t see the metal pipework which ties all the vacum hoses together.
Maybe someone has ditched the sequential setup for the turbos and messed around with it that way :confused:
You might do as well to take the inlet manifold off and have a proper look under there as it deffinately doesn\'t look standard.
You say you are getting 0.2bar, is that even at low revs?, are you not getting 0.7bar on 1st turbo at circa 2,500rpm?
If not it may be consistant with it being changed to non sequential or something
Doesn\'t look the same ,does it?
Was worrying that I wasnt looking at the right places.
0.2 is the highest it\'ll go. These days, I\'ve not reved it at all, so not sure about the readings...... Dont want to reck anything.
Which bit is inlet manifold?? is it the metal cover bit on the top??
Cheers
Yep the big alloy thing :D
off the top of my head..
- remove throttle cable
-remove the inlet pipe on the RHS (as you are standing at front of car)
- remove the platic elbow (at throttle body end), 4 x 10mm nuts, 2 of which are underneath and hold a solenoid on
- remove the water pipes at throttle body end, one at top one underneath (visible from standing on rhs of car)
- unplug earth strap (back LHS)
- remove another earth tag (near the one above), 12mm bolt
- Think you have to unclip the lambda sensor plug from the manifold (clipped on near earth strap)
- undo 4 x 12mm bolts holding the inlet down to the engine (all on LHS)
- remove vacum hoses from Map sensor (attatched to bulkhead, rhs) and vacum hose to the solenoid on the throttle end
- as you lift it up you will need to unplug a sensor on the underside of the inlet (air temp, i think?) and remove a vacum hose with a check valve on it from a nipple on the underside of the manifold, also 2 vacum hoses at the front near the oil filler need to be pulled off the chack valves and a breather to the oil filler
probably missed something, but gotta fly to the inlaws now..
It sounds worse than it is :D
Sorry James, was that in English??? :confused: :confused:
Right, think it\'s time to pay someone to do it then........
BTW, Im not even getting 0 bar @ 2,5k........ :(
Will get it sorted this week or so and post up, maybe of some use for other in the future, since so many of us are having boost issues.
Big thanks for those who\'ve helped.
Cheers
Hi JJ,
Check out this link, it\'s an article about how to diagnose boost problems on a 3rd gen:
http://www.autosportracetech.com/RX-7/TurboTroubleshooting.htm
The diagram below is taking from the guide above and helps identify areas to check. It\'s something you can do quite quickly and easily without needing to go to a specialists...
(http://www.autosportracetech.com/RX-7/PrimaryTurboLeak.jpg)
HTH
H
Cheers for that Spotlamp.
Will give that a go. :D
The reason it is different is because it is a post 95 car
Hi JayDee,
Doh, I forgot to say it\'s a 96..... sorry guys......
Anychance someone has a pic for the post 95s....
Cheers
Hi,
Problem solved. Maybe useful for those with post 95s.
It turned out that the vacum horse circled in the pic was kicked or dont know how you call it......
Basically the vacum horse\'s so badly bent and flattened that it\'s blocking air flow.
After changing the horse, the primary turbo was kicking in happily.
As for the second turbo, it turned out to be just a loose horse. Cant remember which one now.
With both turbos working, my Rex\'s now finally how it should be.
:D :D :D
That hose is supposed to have a spring inside to stop it kinking. when I replaced my hoses, I just put a spring around the outside of it, does the same job.
Good job, glad you\'ve fixed it. Does make the world of difference when they\'re running properly...
H
Yeah, my car\'s finally running how it should have been. I remember laughing out loud when I floored it in third and felt both turbo kicking in.
:D
QuoteOriginally posted by J.j.
Yeah, my car\'s finally running how it should have been. I remember laughing out loud when I floored it in third and felt both turbo kicking in.
:D
I still do that after 2 years of ownership :D