3crows Posted June 14, 2018 Share Posted June 14, 2018 (edited) 86 GL, 5 speed with Weber carb. Been running fine until yesterday. Driving on freeway and noticed that I was slowing down. Accelerated to get back to speed but still gradually was losing power until I had it floored going up a slight grade. Tops at 3K and won't go faster than 60mph on the flat and drops to 55mph going up a slight incline. I made it home and at lower speeds it seems to drive OK but I need to know what to check and fix before I drive it anywhere again. I hate walking! It's not the clutch. Been there, done that but it seems that somewhere in reading these forums in the past something was mentioned about plugged catalytic converters causing this or fuel filter at fuel pump. It's not making any new unusual sounds, just the flapping sound at low speeds I stated in an earlier post I made that no one knew the cause of. Sill unsolved. I haven't done a compression check on it yet but just wanted to see what you folks could come up with as possibilities. Edited June 14, 2018 by 3crows Quote Link to comment Share on other sites More sharing options...
Dee2 Posted June 14, 2018 Share Posted June 14, 2018 Did you fuel up recently -- maybe bad fuel. Clogged fuel filter ??? Clogged air filter ?? Could be any number of reasons. Check the easy things first then start testing/checking more difficult things. Quote Link to comment Share on other sites More sharing options...
DaveT Posted June 14, 2018 Share Posted June 14, 2018 sounds like possibly blocked exhaust to me. Loosen the nuts on the header studs, drop the flanges a half inch. take a short drive - it will be loud, but if the power is back, you found the problem. 1 Quote Link to comment Share on other sites More sharing options...
Knucklehead Saloon Posted June 16, 2018 Share Posted June 16, 2018 +1 to what DaveT said. Sounds like a collapsed baffle in the muffler or cat. That'll give you a rattle and/or flapping sound and kill top end power. Try getting someone to hold a steady 2000 rpm in the driveway while you stand at the back of the car. Then shut the motor down quick. Alot of times you'll hear a hissing sound as exhaust still escapes past an exhaust blockage. Cheers Knucklehead. 1 Quote Link to comment Share on other sites More sharing options...
3crows Posted July 9, 2018 Author Share Posted July 9, 2018 (edited) A bit late but other things happening. So, Dave, dropped the header pipes and went out for a roaring drive. Tried to shift into third and there was no hole. Don't know what's going on now. I idled down to about 10mph before I could get into second and just limped on home. Think I've got a project. I always thought that the old Subaru tranys were bullet proof. Glad I have my old Dodge pickup in the meantime. Edited July 9, 2018 by 3crows Quote Link to comment Share on other sites More sharing options...
el_freddo Posted July 9, 2018 Share Posted July 9, 2018 @3crows - are you saying that the gearbox let go/broke/has done something stupid? Engine is running ok then, just weighed down by increased friction in the gearbox? Cheers Bennie 1 Quote Link to comment Share on other sites More sharing options...
3crows Posted July 26, 2018 Author Share Posted July 26, 2018 I don't know yet. I got home and parked it for now. I think I'm getting too many balls in the air. By backhoe stopped in the middle of digging up a stump so I've been working on that. I got another '86' Soob and replaced the clutch and front axles. Now it won't start. I'm about ready to open a vein! Quote Link to comment Share on other sites More sharing options...
Dee2 Posted July 26, 2018 Share Posted July 26, 2018 2 hours ago, 3crows said: I'm about ready to open a vein! Don't do that. Can't help with the backhoe but pick a soob project and let's start doing some diagnostics so the problem can be found. Quote Link to comment Share on other sites More sharing options...
3crows Posted July 26, 2018 Author Share Posted July 26, 2018 Can I keep going with it in this post or should I start a new one? Quote Link to comment Share on other sites More sharing options...
DaveT Posted July 26, 2018 Share Posted July 26, 2018 It generally makes it easier and more useful for others down the road to make separate threads for separate problems. I have a Dynahoe 190, and have worked on a few backhoes. Quote Link to comment Share on other sites More sharing options...
Dee2 Posted July 26, 2018 Share Posted July 26, 2018 You've already started the 86 GL here so keep going. Others, as Dave said, can be in new threads. Quote Link to comment Share on other sites More sharing options...
3crows Posted July 26, 2018 Author Share Posted July 26, 2018 (edited) I started a new thread "Soob Won't Start' as Dave suggested. My backhoe is a JCB which I'm sure is the British form of revenge for losing the America Revolutionary War. I was reasonably sure it was the injector pump which is impossible to reach without pulling the radiator which took 4hrs and the fan to be able to get a puller in there. Then I read I should have checked the lift pump screen first. It was really gummed up and was probably the source of the problem since it happens before fuel goes to the injection pump. I'll get it rebuilt anyway at this point. It's nearly 30 years old. Just a bit off topic. Edited July 26, 2018 by 3crows Quote Link to comment Share on other sites More sharing options...
HUAWEI3054 Posted August 11, 2018 Share Posted August 11, 2018 I WOULD REPLACE THE FUEL FILTER OR TAKE IT OFF AND SPRAY A WHOLE BUNCH OF CARB CLEANER AND WAIT 5 MINUTES AND THEN SPRAY SOME MORE BACKWARDS AND THEN PUT IT BACK ON THEN THEN SEE WHAT HAPPENS Quote Link to comment Share on other sites More sharing options...
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