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

- - - - -

EA81 loosing power

  • Please log in to reply
6 replies to this topic

#1 subieman


    1000+ Super USER!

  • Members
  • 1,422 posts
  • Sparks, NV

Posted 13 November 2003 - 02:58 AM

My 84 hatchback is loosing power, more and more everyday. Hills I used to be able to climb at 60mph are now 45mph. Cap and rotor, plugs and wires are 1 year old. No brakes are dragging. All the hoses are hooked up and not cracked.

Would some carb cleaner help? Maybe a new fuel filter? I'm looking for some suggestions.

Car has 138k miles.

Thanks in advance :-)

#2 Russ Hill

Russ Hill

    Jesus Freak

  • Members
  • 520 posts

Posted 13 November 2003 - 03:56 AM

Could be fuel filter. It could also be the exhaust, If it's getting restricted it will rob power.

#3 Tom63050


    Subaru Fanatic!

  • Members
  • 373 posts
  • St. Louis

Posted 13 November 2003 - 05:45 AM

Yeah, stick on a new fuel filter (and keep a spare in the glove box). On carbed cars they can plug up every 10-15K miles. This will at least eliminate this as the problem, if no improvement is seen. This is probably not the problem though, as in my experience a carburetor fuel filter will work fine until it goes out. You will probably get a few miles of bad running, then it dies.

Pour a can of fuel sysyem cleaner into the as tank too. Might as well try all the easy/cheap fixes first. Get the kind that cleans the carb/fuel injectors, valves and combustion chamber. I use this stuff once a year. Often there's a very noticable difference, depending on how clogged up the system is.

A plugged cat could be the problem. You could cut off the pipe directly behind the cat, and then ream the cat out a bit with a hole saw, to improve flow through it. Then start the car with the cut pipe still not connected, to blow out the particles in the cat. Only do this if you don't have to worry about passing emissions, of course. Otherwise get a new high-flow cat put on. On my 86 MR2 I recently put on a new cat, The old one you could barely see thru, even holding it up to the sun! Gas mileage and power went up considerably, and oh yeah it passed emissions.

At the risk of insulting, I presume the air filter is fairly new? I once bought a car with 42K miles that had the original air filter still on it. Horrible gas mileage. When I discovered the old air filter, first I cleaned it and got better mileage. Then I replaced it and got much better mileage.

#4 Caboobaroo


    USMB Drunk

  • Members
  • 7,157 posts
  • Oregon City

Posted 13 November 2003 - 05:48 AM

I can't quite remember but I think there's 2 fuel filters on it. One is located underneath the passenger side near the tank and the other is located on the firewall. I know JonOfScio's 88 hatchback has 2 but I'm not sure on the older ones.....I never replaced the filters in my 83 but I know there was one on the firewall for sure:D

#5 Tom63050


    Subaru Fanatic!

  • Members
  • 373 posts
  • St. Louis

Posted 13 November 2003 - 06:35 AM

Caboo is right, on many of these carbed cars there're two filters. The main one is under the car, by the fuel pump (behind the right rear wheel). The other one is in the engine copmpartment, by the firewall right in front of the driver. This one is technically not there just to be another fuel filter, but is part of the fuel return system.

If you have your fuel pump in the engine compartment, it & its filter will be near the firewall right in front of the driver. I think this applies to early 80s subes, like 80 and 81. (Experts please provide more detail.)

#6 Meeky Moose

Meeky Moose

    Subaru Master

  • Members
  • 2,343 posts
  • Grants Pass

Posted 13 November 2003 - 07:39 AM

well as far as fuel filters go, my 84' hatch has one under the car by the fuel pump, and also one up under the hood right behind/next to the strut tower..

#7 subieman


    1000+ Super USER!

  • Members
  • 1,422 posts
  • Sparks, NV

Posted 13 November 2003 - 12:38 PM

Thanks for all the suggestion. I'll run some cleaner through the gas and spray some carb cleaner. And see if that helps. If not I'll replace the fuel filters. I hope this is all thats wrong. I'll pull a plug also and see how that looks. Is there anyway to test the exhaust system without pulling it?

PS. It's been backfiring a lot latley. Could that have destroyed my cat? And how would I fix the backfiring problem?

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users