Go Back   Rotary Car Club > Tech Discussion > RX-7 2nd Gen Specific (1986-92)

RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections.


Welcome to Rotary Car Club.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Reply
 
Thread Tools Display Modes
Old 04-21-2009, 02:38 PM   #16
vex
RCC Loves Me Not You
 
vex's Avatar
 
Join Date: Jul 2008
Location: Influx.
iTrader: (6)
Posts: 2,113
Rep Power: 19
vex will become famous soon enough
Default

I say it's a mouse that got sucked in.






vex is offline   Reply With Quote
Old 04-21-2009, 02:55 PM   #17
rx4ur7
Rotary since 1972
 
rx4ur7's Avatar
 
Join Date: Nov 2008
Location: Tucson
iTrader: (0)
Posts: 231
Rep Power: 17
rx4ur7 is on a distinguished road
Default

Afraid it sounds like a bearing, rear.
rx4ur7 is offline   Reply With Quote
Old 04-21-2009, 02:59 PM   #18
djmtsu
My minds tellin' me no...
 
djmtsu's Avatar
 
Join Date: Feb 2008
Location: Murfreesboro, TN
iTrader: (10)
Posts: 4,043
Rep Power: 21
djmtsu will become famous soon enough
Default

My next question is, how the hell would a bearing fail with only about 16K on the engine? And the oil checked and changed religiously?

Also why am I getting great oil pressure? Wouldn't bearing failure read low pressure? Or no pressure?

That sucks, because if it is a bearing that is going to be alot more expensive to rebuild than I had planned.
__________________
1976 Mazda Cosmo RX-5
1976 Mazda Cosmo RX-5
2003 Toyota Tundra TRD
2015 Toyota 4Runner SR5

Last edited by djmtsu; 04-21-2009 at 03:14 PM..
djmtsu is offline   Reply With Quote
Old 04-21-2009, 06:40 PM   #19
rx4ur7
Rotary since 1972
 
rx4ur7's Avatar
 
Join Date: Nov 2008
Location: Tucson
iTrader: (0)
Posts: 231
Rep Power: 17
rx4ur7 is on a distinguished road
Default

Bad install, bad bearing to start with. Blocked oil passage. Anything is possible.

Yes oil pressure should usually give you some indication.

If turbo isn't coming apart not much more that can cause that kind of noise. Fuel delivery or ignition issues usually don't sound like a bad rod. Could be quality of sound on vid but sure sounds like metal on my computer.

Air pumps can make really nasty noises especially when they shuck a seal. Parts get stuck in the ACV and cause rough running. Partially blocked exhaust will cause lack of top end power, but you would notice higher water temps when run for any length of time.

If you can get a hold of the old tape compression tester to use it gives you much better read out for diagnostic.
rx4ur7 is offline   Reply With Quote
Old 04-22-2009, 02:29 PM   #20
djmtsu
My minds tellin' me no...
 
djmtsu's Avatar
 
Join Date: Feb 2008
Location: Murfreesboro, TN
iTrader: (10)
Posts: 4,043
Rep Power: 21
djmtsu will become famous soon enough
Default

Quote:
Originally Posted by rx4ur7 View Post
Bad install, bad bearing to start with. Blocked oil passage. Anything is possible.
Don't think that is it. I stand behind the company that built my engine, and it has ran FLAWLESS until now.

Quote:
Originally Posted by rx4ur7 View Post
Yes oil pressure should usually give you some indication.
And my Oil Pressure is spot on.

Quote:
Originally Posted by rx4ur7 View Post
If turbo isn't coming apart not much more that can cause that kind of noise. Fuel delivery or ignition issues usually don't sound like a bad rod. Could be quality of sound on vid but sure sounds like metal on my computer.
I am thinking that clunking is something else, like something banging because the engine is shaking so much. It isn't that loud in person. I might need to look into some new motor mounts. LOL.

Quote:
Originally Posted by rx4ur7 View Post
Air pumps can make really nasty noises especially when they shuck a seal. Parts get stuck in the ACV and cause rough running. Partially blocked exhaust will cause lack of top end power, but you would notice higher water temps when run for any length of time.
No air pump, infact I have never had one on this car.

Quote:
Originally Posted by rx4ur7 View Post
If you can get a hold of the old tape compression tester to use it gives you much better read out for diagnostic.
When I bring it home, I will look into it more. Starting with replacing the coils, and checking the injectors harness, and the injectors themselves.

The only good thing is, if it is toast I will make it better next time.
__________________
1976 Mazda Cosmo RX-5
1976 Mazda Cosmo RX-5
2003 Toyota Tundra TRD
2015 Toyota 4Runner SR5
djmtsu is offline   Reply With Quote
Old 04-23-2009, 11:28 AM   #21
My5ABaby
Sigh.....
 
My5ABaby's Avatar
 
Join Date: Feb 2008
Location: Murfreesboro, TN
iTrader: (6)
Posts: 2,377
Rep Power: 19
My5ABaby will become famous soon enough
Default

Check your PMs DJ.
__________________
1986 Sport: 132k miles, 5A (Sapphire Blue Metallic), Tokico Blues, Racing Beat Springs, Custom LED tailights (only S4 LED tails in the world), SSR Mark II, Racing Beat exhaust, S5 black interior, Rotary Resurrection rebuild at 120k miles

Community Service Manual

RotorWiki

"Imagination costs nothing; we could build square locomotives or fly to Mars" - Felix Wankel

Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the "present."
My5ABaby is offline   Reply With Quote
Old 04-23-2009, 09:28 PM   #22
TehMonkay
Rotary Fanatic
 
Join Date: Apr 2008
Location: Louisville, KY
iTrader: (0)
Posts: 302
Rep Power: 17
TehMonkay is on a distinguished road
Default

Check your electrical connectors on the injectors and make sure theyre not damaged, all of them get 12v with ignition on, and if you can see if the ecu is opening them when you try and start the car. As long as you are getting spark to both leading plugs i'd say it's fuel.
__________________
My car blows up everytime I start it, it's rotary

TehMonkay is offline   Reply With Quote
Old 04-25-2009, 06:44 PM   #23
djmtsu
My minds tellin' me no...
 
djmtsu's Avatar
 
Join Date: Feb 2008
Location: Murfreesboro, TN
iTrader: (10)
Posts: 4,043
Rep Power: 21
djmtsu will become famous soon enough
Default

I think I found out what the 'hammering' sound is. The AFM and air filter are not securely mounted anymore, and the end of the filter was knocking against the inner fender. When we I fired it up to move it onto the trailer, I held my hand on it and that sound went away.

Whew.
__________________
1976 Mazda Cosmo RX-5
1976 Mazda Cosmo RX-5
2003 Toyota Tundra TRD
2015 Toyota 4Runner SR5
djmtsu is offline   Reply With Quote
Old 04-26-2009, 04:35 AM   #24
NoDOHC
The quest for more torque
 
NoDOHC's Avatar
 
Join Date: Sep 2008
Location: Sheboygan, Wisconsin
iTrader: (1)
Posts: 855
Rep Power: 17
NoDOHC will become famous soon enough
Default

Keep us posted, I hope nothing major is wrong.
__________________
1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers)
1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)
NoDOHC is offline   Reply With Quote
Old 05-07-2009, 10:01 PM   #25
Mobius
Rotorhead
 
Join Date: May 2008
Location: Drumheller, Alberta
iTrader: (1)
Posts: 164
Rep Power: 17
Mobius is on a distinguished road
Default

Since the AFM wasn't set securely, and was banging around like my ex, then would it not make sense to check/replace the AFM to ensure it's working properly?
__________________

||| Never argue with idiots. They will bring you down to their level and beat you with experience. |||
Mobius is offline   Reply With Quote
Old 09-27-2009, 09:02 AM   #26
djmtsu
My minds tellin' me no...
 
djmtsu's Avatar
 
Join Date: Feb 2008
Location: Murfreesboro, TN
iTrader: (10)
Posts: 4,043
Rep Power: 21
djmtsu will become famous soon enough
Default

Finally got around to compression test yesterday.

All good on both rotors. Spark is good, so its time to pull manifold and check injectors.
__________________
1976 Mazda Cosmo RX-5
1976 Mazda Cosmo RX-5
2003 Toyota Tundra TRD
2015 Toyota 4Runner SR5
djmtsu is offline   Reply With Quote
Old 09-27-2009, 12:47 PM   #27
josh18_2k
Rotary Fanatic
 
Join Date: Feb 2008
Location: Gresham, OR
iTrader: (0)
Posts: 473
Rep Power: 17
josh18_2k is on a distinguished road
Default

v8 time!
__________________
josh18_2k is offline   Reply With Quote
Old 09-27-2009, 01:55 PM   #28
Whizbang
Respecognize!
 
Whizbang's Avatar
 
Join Date: Jul 2008
Location: Δx = ħ/2Δp
iTrader: (5)
Posts: 3,190
Rep Power: 20
Whizbang will become famous soon enough
Default

hammer time?
__________________
For current updates and event coverage check out
Follow on Twitter! @WhizbangRally
Whizbang Rally's Webpage | Facebook
Whizbang is offline   Reply With Quote
Old 09-27-2009, 02:48 PM   #29
Phoenix7
FUCK the fucking fuckers
 
Phoenix7's Avatar
 
Join Date: Mar 2008
Location: THE only Bay Area, Northern California
iTrader: (7)
Posts: 3,172
Rep Power: 20
Phoenix7 will become famous soon enough
Default

Quote:
Originally Posted by josh18_2k View Post
v8 time!
and your car looks in black.
__________________
Quote:
Originally Posted by Monkman33 View Post
But I've learned that people that don't like guns, tend to like stretched tires.

Which makes perfect sense. They are sacrificing safety either way. lol


Phoenix7 is offline   Reply With Quote
Old 09-27-2009, 02:52 PM   #30
Phoenix7
FUCK the fucking fuckers
 
Phoenix7's Avatar
 
Join Date: Mar 2008
Location: THE only Bay Area, Northern California
iTrader: (7)
Posts: 3,172
Rep Power: 20
Phoenix7 will become famous soon enough
Default

Quote:
Originally Posted by Mobius View Post
Since the AFM wasn't set securely, and was banging around like my ex, then would it not make sense to check/replace the AFM to ensure it's working properly?
+1

used injectors? How many miles?
__________________
Quote:
Originally Posted by Monkman33 View Post
But I've learned that people that don't like guns, tend to like stretched tires.

Which makes perfect sense. They are sacrificing safety either way. lol



Last edited by Phoenix7; 09-27-2009 at 02:54 PM..
Phoenix7 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 02:50 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Hosted by www.GotPlacement.com
Ad Management by RedTyger