Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

'78 BRAT with WEBER spit sputter cough pop...


  • Please log in to reply
4 replies to this topic

#1 subiemech85

subiemech85

    SIX STAR SERVICE

  • Members
  • 2,710 posts
  • down by the river

Posted 24 March 2009 - 09:32 PM

blasted thing does not want to run right when at part throttle
as in when you let off the gas a little to slow down just a bit or quit going faster
spit sputter cough pop... :mad:

seems to be fine while throttle open or closed :banghead:

timing has little effect, but seems better at 20+ than 10

idle mixture set in middle of good range, but has little effect

manual choke off

130 psi compression

valves set correct, fresh tuneup

28 mpg!

#2 VaporTrail

VaporTrail

    Brattitude Adjustment

  • Administrator
  • 11,149 posts
  • Central Iowa

Posted 24 March 2009 - 10:47 PM

maybe it didn't like the long trip :)

what are you running for fuel?

is the fuel filter full? may want to swap back to the original pump?

#3 subiemech85

subiemech85

    SIX STAR SERVICE

  • Members
  • 2,710 posts
  • down by the river

Posted 25 March 2009 - 12:03 AM

maybe it didn't like the long trip :)

what are you running for fuel?

is the fuel filter full? may want to swap back to the original pump?


sure it does :D

50% E85 to try to clean out the system, remember: the ski wagon ran good with this carb on E85

it was also doing this to me with KUM & go and GIT & go gas

even did this with a big vac. leak :eek:

filters are fine

don't use ethanol blended fuel in it. Its getting harder and harder to find places to buy it with no E. E is bad on Subaru engines. My manual to the SVX strictly in BIG BOLD LETTERS says do not use fuel that has higher than 10% ethanol, it will destroy the engine. I know for a fact gas stations in Iowa are mixing E in at higher than the 10% rates.
I use premium, and only from Amoco/BP or Phillips/Conoco

I for one will be glad when Ethanol industry goes under and its over.



this isn't a SVX, it doesn't care what it has


will try either a different weber :brow: or a rebuild kit


could also switch back to the hitachis

#4 Twitch de la Brat

Twitch de la Brat

    Village Psycho

  • Members
  • 1,533 posts
  • The Athol of Idaho

Posted 28 March 2009 - 05:21 PM

I concurr with Mcbrat.
It sounds like it may have a semi clogged fuel filter or a weak fuel pump.
Another idea I have is that it may have a leak in the exhaust breather system.
That will cause the pop gurgle BLAM!!! Backfiring and the like.
I should know, my brat has this problem :D
I personally don't mind, I think it makes it sound like a racecar. :-p
But if it is accompanied with a lack of power (HA! an EA engine
lacking power, like that ever happens) I don't know.

Twitch

#5 subiemech85

subiemech85

    SIX STAR SERVICE

  • Members
  • 2,710 posts
  • down by the river

Posted 31 March 2009 - 03:42 AM

cleaned and adjusted float height of HITACHI
so clean it almost looks new!!
have yet to adjust idle and idle mixture
replaced ALL vac. hoses
essentially returned to factory spec
timing still high, almost out of adjustment, but sounds best where it is set, amazing how much idle changes with more advance
not as cold blooded
still using electronic ignition with advance only diaphram, no retard / advance units could be found

it's 99% better, but have noticed loss of top end performance above 5k


as I was saying, not fuel filters or pump




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users