2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

old gas on fresh rebuild, bad to use old gas or ok ?

Old Jun 12, 2005 | 05:27 PM
  #1  
wthdidusay82's Avatar
Thread Starter
Rotary Power
Tenured Member 15 Years
iTrader: (15)
 
Joined: Sep 2004
Posts: 3,706
Likes: 4
From: Dinwiddie, Va
old gas on fresh rebuild, bad to use old gas or ok ?

ok i got a rebuilt engine and i am going to be starting it up soon , the gas in it is probably 9 months old or so ( from last september when i bought the car or earlier)

would using this old gas be bad for my motor ? should i add some new gas to it ? should i drain it and add new gas ( this seems like it may be a pita ) ? any other good solutions ?
Reply
Old Jun 12, 2005 | 05:48 PM
  #2  
RotaryEvolution's Avatar
Sharp Claws
Tenured Member 15 Years
iTrader: (30)
 
Joined: Oct 2003
Posts: 5,107
Likes: 50
From: Central Florida
expect the mods to chew you a new *** for posting 5 topics in 5 minutes when you could have compressed them into one...

i would suggest draining it but i ran my rebuild with 9 month old gas with no problems. there is a drain plug on the fuel tank but getting rid of the gas is another dilemma.
Reply
Old Jun 12, 2005 | 07:32 PM
  #3  
jhammons01's Avatar
Carter 2.0
Tenured Member 10 Years
 
Joined: Jun 2004
Posts: 6,262
Likes: 7
From: Irvine Ca.
just burn it. It'll be fine. You (should) have so much oil and vaseline in that motor right now.
Reply
Old Jun 12, 2005 | 08:57 PM
  #4  
wthdidusay82's Avatar
Thread Starter
Rotary Power
Tenured Member 15 Years
iTrader: (15)
 
Joined: Sep 2004
Posts: 3,706
Likes: 4
From: Dinwiddie, Va
Originally Posted by jhammons01
just burn it. It'll be fine. You (should) have so much oil and vaseline in that motor right now.

it was rebult by kevin landers ( rotary resurrection) i donno if he uses vaseline but yeah i could just burn it but should i add more fresh gas to it or drrain it or what
Reply
Old Jun 12, 2005 | 08:58 PM
  #5  
wthdidusay82's Avatar
Thread Starter
Rotary Power
Tenured Member 15 Years
iTrader: (15)
 
Joined: Sep 2004
Posts: 3,706
Likes: 4
From: Dinwiddie, Va
Originally Posted by Karack
expect the mods to chew you a new *** for posting 5 topics in 5 minutes when you could have compressed them into one...

i would suggest draining it but i ran my rebuild with 9 month old gas with no problems. there is a drain plug on the fuel tank but getting rid of the gas is another dilemma.

why is getting rid of it another dilemma ? oh well i may drain it may not i will decide later lol
Reply
Old Jun 12, 2005 | 08:59 PM
  #6  
RotaryEvolution's Avatar
Sharp Claws
Tenured Member 15 Years
iTrader: (30)
 
Joined: Oct 2003
Posts: 5,107
Likes: 50
From: Central Florida
well i guess you could use it in your lawnmower and mow everyone in a few blocks lawns.
Reply
Old Jun 12, 2005 | 09:03 PM
  #7  
wthdidusay82's Avatar
Thread Starter
Rotary Power
Tenured Member 15 Years
iTrader: (15)
 
Joined: Sep 2004
Posts: 3,706
Likes: 4
From: Dinwiddie, Va
Originally Posted by Karack
well i guess you could use it in your lawnmower and mow everyone in a few blocks lawns.

i donno if i want to drain it because of the pita factor, i have a very small garage to work in and its a pain to get under the car especially in the back of the car lol
Reply
Old Jun 12, 2005 | 09:08 PM
  #8  
RotaryEvolution's Avatar
Sharp Claws
Tenured Member 15 Years
iTrader: (30)
 
Joined: Oct 2003
Posts: 5,107
Likes: 50
From: Central Florida
i'm sure it will be fine then, just let it idle and burn off most of the old gas then drive it to a gas station and put fresh gas in.
Reply
Old Jun 12, 2005 | 09:52 PM
  #9  
alwayssideways's Avatar
Nurse I need 1300cc's NOW
Tenured Member 05 Years
 
Joined: Dec 2003
Posts: 1,261
Likes: 1
From: Hartford
if it makes you feel better my car sat for like 8 months with no engine. you ll be fine .. my other fc sat for 2 years. and it still fired up . i would just add some fresh gas. but you should be fine
Reply
Old Jun 12, 2005 | 11:57 PM
  #10  
badge988's Avatar
Registered Crazy Person
Tenured Member 05 Years
 
Joined: May 2005
Posts: 60
Likes: 0
From: Cambridge
Won't be an issue as cars of this type had a pretty tight evaporative control system on them. If the cap was on the tank you won't have moisture in the tank.

Just burn it off and refill like you normally would.

988
Reply
Old Jun 13, 2005 | 12:52 AM
  #11  
therotaryrocket's Avatar
PIMP
Tenured Member 20 Years
 
Joined: Feb 2004
Posts: 1,012
Likes: 0
From: Greensboro, NC
but afterwards, maybe replace the fuel filter, old gas seems to me to turn jelly-like.
Reply
Old Jun 13, 2005 | 05:37 AM
  #12  
felixwankel88's Avatar
Eats, Sleeps, Dreams Rotary
Tenured Member: 20 Years
iTrader: (1)
 
Joined: Dec 2003
Posts: 3,678
Likes: 5
From: LEE,MA
your saying your fc atcutally had fuel in it lol, but mine had like 1/8 tank when i put the re rebuild in it, it sat like 2 years i did add 5 gallons to duilute it, and it seems to be fine
Reply
Old Jun 13, 2005 | 05:58 AM
  #13  
Cosmo_TT's Avatar
BRAAAAAP pssh BRAAAAAP
Tenured Member 15 Years
iTrader: (11)
 
Joined: Mar 2004
Posts: 1,461
Likes: 1
From: cali
well mine sat for about four years and there was no way i was going to let it be in there when i fired it up so i drained it i filled up almost 3 five gallon buckets
then made a big i mean BIG fire lol
at a friends that is gas on fire is cool
Reply
Old Jun 13, 2005 | 07:47 AM
  #14  
buttsjim's Avatar
Senior Member
Tenured Member 20 Years
 
Joined: Mar 2002
Posts: 637
Likes: 2
From: San Antonio TX
I think it's worth the effort to drain the tank and have peace of mind.

My tank was really easy to drain, but it only had about 5 gallons in it. I put the drained gas in my wife's car--it mixed with the newer gas already in her tank and ran fine.
Reply
Old Jun 13, 2005 | 09:08 AM
  #15  
Barwick's Avatar
SCCA Rookie
Tenured Member 20 Years
 
Joined: May 2001
Posts: 1,936
Likes: 0
From: Sterling Heights, MI
if you want to drain the fuel, pull the fuel sending line off the engine, pick up a male-male connector and about 5 foot of fuel hose, connect 'em up and drop the end of that line into a gas can.

Then, go look in your shop manual and it'll show you where the connector is (passenger side front of the engine bay, I think it's yellow or green) that you have to jumper (connect a wire between the ends) to enable "fuel pump test mode". This makes sure the fuel pump stays running longer than the (15?) seconds it normally runs when you turn the ignition to "on".

And then... drain the tank, and go to your neighbors saying "I've got some gas that was in my sports car, I didn't want to burn it in that car because it needs high octane, but it should be good for a lawn mower, do you want some?"
Reply
Old Jun 13, 2005 | 09:09 AM
  #16  
wthdidusay82's Avatar
Thread Starter
Rotary Power
Tenured Member 15 Years
iTrader: (15)
 
Joined: Sep 2004
Posts: 3,706
Likes: 4
From: Dinwiddie, Va
Originally Posted by therotaryrocket
but afterwards, maybe replace the fuel filter, old gas seems to me to turn jelly-like.

i already replaced the fuel filter

so i dont think i have any need to replace it again ?
Reply
Old Jun 13, 2005 | 09:29 AM
  #17  
buttsjim's Avatar
Senior Member
Tenured Member 20 Years
 
Joined: Mar 2002
Posts: 637
Likes: 2
From: San Antonio TX
I'm not sure about your filter, but I would think a new filter with 9 month old fuel would be ok.

My big mistake with my rebuild was not cleaning the injectors. My gas was over 2 years old, and 3 injectors were totally gummed up and wouldn't spray any fuel. I wasted a lot of time trouble shooting a problem that I could have easily avoided.

At the very least, you may want to spray a little carb cleaner in each end of all your injectors.
Reply
Old Jun 13, 2005 | 02:11 PM
  #18  
jhammons01's Avatar
Carter 2.0
Tenured Member 10 Years
 
Joined: Jun 2004
Posts: 6,262
Likes: 7
From: Irvine Ca.
^^^ He should be "cleaning" his injectors while the fuel rails are sitting in the corner of the garage for 8 months!!

And if Kevin built it, it's full of lubricants.
Reply
Old Jun 13, 2005 | 07:06 PM
  #19  
wthdidusay82's Avatar
Thread Starter
Rotary Power
Tenured Member 15 Years
iTrader: (15)
 
Joined: Sep 2004
Posts: 3,706
Likes: 4
From: Dinwiddie, Va
Originally Posted by jhammons01
^^^ He should be "cleaning" his injectors while the fuel rails are sitting in the corner of the garage for 8 months!!

And if Kevin built it, it's full of lubricants.
i got all my injectors cleaned and i even got an extra 3 cleaned also so im all set
Reply


Thread Tools
Search this Thread

All times are GMT -5. The time now is 09:50 AM.