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Mazda Rotary Club

Cars by Model Type => 3rd generation RX-7's => Topic started by: L12A GN on August 13, 2006, 12:05:20 AM

Title: fd answers?
Post by: L12A GN on August 13, 2006, 12:05:20 AM
wot should a stock FD rev to?

and its seems to ket a kick from 1st turbo but unsure weather 2nd is boosting ok? seems a bit sluggish in the mid range sometimes and rev as quick as it does like in 1st n 2nd gears , just wondering if there anything  wrong or i could get fixed

thanks
Title: fd answers?
Post by: Grizzly on August 13, 2006, 12:36:19 AM
You may want to do a search.

Fd\'s have some issues with Vac lines etc coming loose etc as the Second Turbo System is so complex.

Your not the first to have this problem and there are plenty of threads about it.
http://www.mazdarotaryclub.com/forums/showthread.php?t=27569&highlight=turbo+problem
Title: fd answers?
Post by: L12A GN on August 13, 2006, 12:38:38 AM
thanks you im reading old post as you replied lol

is it usually sinple fix?
im gonna try get a boost gauge tomoz n do a boost patern read i think
Title: fd answers?
Post by: Grizzly on August 13, 2006, 12:41:53 AM
There are a few things that can cause this problem but its usaly very fixable.

If you are starting to have problems with the rats nest though i\'d be looking into getting it repiped, the old pipe is the biggest cause of problems. Its just finding the one thats causing the problem, Also check the Solenoids.
Title: fd answers?
Post by: L12A GN on August 13, 2006, 12:44:29 AM
is there a way to cheack the soleniods?
is changing the rats next for a pro?
Title: fd answers?
Post by: Grizzly on August 13, 2006, 12:55:59 AM
Theres quite alot on the US forum about this problem too. http://www.rx7club.com/showthread.php?t=496397&highlight=checking+solenoids

Changing the Rats nest Vac pipes is not a nice job to do but if you cut the old pipes off with a sharp Knife and do them one at a time its not Difficult just Fiddly.
Title: fd answers?
Post by: Phil on August 13, 2006, 11:13:02 PM
Mine did this, I removed the small black plastic box in the middle of the engine (under the strut brace) and found a one way valve had split in two. Glued it back together to test and it works fine now. I guess I will replace it when it goes again!
Title: fd answers?
Post by: Grizzly on August 13, 2006, 11:19:59 PM
If you do find you have a problem with a Check valve it may be worth your while investing in a set of these http://cgi.ebay.com/ebaymotors/RX-7-93-95-DURABLE-VITON-Check-Valves-set-of-4-FD3S_W0QQitemZ290018622573QQihZ019QQcategoryZ33742QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Title: fd answers?
Post by: Phil on August 13, 2006, 11:31:12 PM
Thanks for that, just bought a set incase the one I fixed isn\'t working correctly.
Title: fd answers?
Post by: Adriansturgess on August 13, 2006, 11:36:14 PM
If boosting OK you should feel the second turbo come in very clearly at 4500rpm...There is no mistaking this if its working properly, then should pull very cleanly up to the red line
Title: fd answers?
Post by: L12A GN on August 13, 2006, 11:54:36 PM
tested the boost today went upto 10psi dip to about 7 or 8 psi the back to 10 psi in the lower gears sometime does \'\'kick\'\' then it will the next time? i fixed a crushed hose vac line from the charge releif valve n boosted fine since
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