1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Rebuilt Engine, finally starts, smokes and idles terribly

Thread Tools
 
Search this Thread
 
Old 08-20-07, 02:14 PM
  #1  
Junior Member

Thread Starter
 
matpdx2300's Avatar
 
Join Date: Oct 2006
Location: Portland
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
Rebuilt Engine, finally starts, smokes and idles terribly

I have a '79 rx-7 that I just rebuilt the motor in. I got it to start for the first time last night. My concern is that it smokes a lot. We ran it for about 45 mins. and it continued to smoke a lot. I know it's normal to smoke quite a bit after a fresh rebuild but is it normal to smoke for this long?
Also, I cannot seem to get the mixture right. Is this normal? Am I missing something obvious?
My timing is on, my spark plugs are nice and clean I just am not sure if everything is going the way it's supposed to.
Any help would be greatly appreciated.
Old 08-20-07, 02:29 PM
  #2  
Lives on the Forum

 
Kentetsu's Avatar
 
Join Date: Jun 2004
Location: Grand Rapids Michigan
Posts: 11,359
Received 14 Likes on 11 Posts
What does the smoke smell like? Oil, fuel, or coolant?
Old 08-20-07, 02:32 PM
  #3  
Too old to act my age

 
Rogue_Wulff's Avatar
 
Join Date: Feb 2005
Location: Tulsa, Ok.
Posts: 3,164
Likes: 0
Received 0 Likes on 0 Posts
If the carb is running way too rich, or even trying to flood, you'll never get the engine to idle correctly. It will also cause it to smoke.
Old 08-20-07, 02:38 PM
  #4  
Junior Member

Thread Starter
 
matpdx2300's Avatar
 
Join Date: Oct 2006
Location: Portland
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
I can't really tell what the smoke smells like, it smells like a mixture of things. I don't think it really smells like coolant, but it definitely smells some of oil and fuel...

I'll check the carb to see if it's running way to rich.
Old 08-21-07, 02:11 AM
  #5  
1200 gone......but......

iTrader: (24)
 
RXnos1200's Avatar
 
Join Date: Oct 2006
Location: so cal
Posts: 902
Likes: 0
Received 0 Likes on 0 Posts
Losing any coolant?
Old 08-21-07, 03:22 AM
  #6  
Hunting Skylines

 
REVHED's Avatar
 
Join Date: Apr 2001
Location: Brisbane, Queensland, Australia.
Posts: 3,431
Likes: 0
Received 2 Likes on 2 Posts
Did you machine the end plates? New oil control o-rings?
Old 08-21-07, 07:12 AM
  #7  
Eats, Sleeps, Dreams Rotary

 
Latin270's Avatar
 
Join Date: Jul 2004
Location: Allentown, PA - Paterson, NJ
Posts: 3,247
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by REVHED
Did you machine the end plates? New oil control o-rings?
Yea, could be one of those pesty water,oil, o-rings. Damn things slip out of place sometimes when re-assembling. Is the smoke white?
Old 08-22-07, 09:27 AM
  #8  
Junior Member

Thread Starter
 
matpdx2300's Avatar
 
Join Date: Oct 2006
Location: Portland
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
I don't appear to be losing much coolant but yeah the smoke is white.

My buddy is pretty sure it's the o-rings. Says that if he puts his hand behind the exhaust for a minute it speckles his hand in oil.

Sound like a tear down and re-assemble?
Old 08-22-07, 09:50 AM
  #9  
What could possibly go wr

iTrader: (1)
 
Clearkut's Avatar
 
Join Date: Apr 2005
Location: Thunder Bay, Ontario
Posts: 212
Likes: 0
Received 0 Likes on 0 Posts
does it just spit condensation or is it for sure oil/coolant, my new rebuild will spit condensation for a bit on thr first start of the day but once its warm it stops, i lose no oil(i premix) or coolant. if its white smoke that disapears right away it may be steam from exhaust condensation, if it stays thick it will likely be coolant, i had one previously that acted like that, it didnt last long or run good ever.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
Kyo
2nd Generation Specific (1986-1992)
6
04-13-19 09:24 AM
ncds_fc
New Member RX-7 Technical
1
08-15-15 10:06 AM



Quick Reply: Rebuilt Engine, finally starts, smokes and idles terribly



All times are GMT -5. The time now is 04:36 PM.