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Old 07-31-2004, 05:30 PM   #1
NitrouStang96
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Join Date: Jul 2004
Default Low power in 1984 GL 10 ??

Girlfriends brother just bought one.
Let me tell you what I have gone through with this thing.

This thing is very very slow, going up a hill it doesn't go past 35, it shifts into 2nd at 2700rpm, and into 3rd even lower. It is perfectly smooth, like it's just a low powered engine. No sputtering, no hesitation, it just feels like it's only got like 50-75hp - the car supposedly only weighs 2000lb. Failed smog test. Smog test dude said it was a clogged cat that is causing the power loss and the failed test.

____________


I removed the back cat, still no power. Removed the Y-pipe from the manifolds along with the front cat, still no power. So I don't think it's a clogged cat.

I retarded the timing some (turned the distributor), no power gain. Advancing the timing only caused detonation, so the timing is set correctly at the distributor.

Even though it's smooth power, I decided to look at the carb. Dinky little two barrel, the back barrel appears to be a vacuum secondary. With the car in park, I floored it and made the front barrel open all the way up, the rear barrel only likes to open about 20 degrees max instead of the full 90 degree open position. I don't know if this is the cause or not. Also, there is only one choke looking type butterfly on the top - in the front barrel. In the back barrel there are threaded screw holes with nothing in them, maybe something is missing - do you know? I have no idea what this carb (and the entire engine is supposed to look like).

_____________


Beyond that, I have no idea what to look at on this car. If it was a Ford, I would check to see that the timing belt was put on properly, but I don't have a Subaru book, nor do I know how to adjust the timing there with the belt, or if it even needs it on this car.

Any help?
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Old 07-31-2004, 08:12 PM   #2
NitrouStang96
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Default

Update:

Took off the air cleaner and disconnected the 5 vacuum hoses connected to it and the exhaust recirculation hose as well. Took her out for a run, and she revs all the way to 5 grand, pulls well. 81mph uphill on the interstate, when before she wouldn't run much past 35mph.
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Old 07-31-2004, 08:48 PM   #3
NitrouStang96
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Default

Put all the stuff back on, still works. Turns out that when I was playing with the throttle linkage, I freed it up and now the throttle is opening wider.

My question is: If the throttle linkage didn't permit the carburetor to get fully open when floored, say only 75-80% or so - would that cause it to fail a smog test?
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Old 08-01-2004, 12:48 AM   #4
jamesfacts
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Location: Brooklyn NYC / Danbury CT
Vehicle:
98 RS
black & blue from parking

Default

OK, so I missed your crosspost from NA.

More advice : Remove engine, insert EA82T. Only about $500, about 50% more power or so, IIRC.
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Old 08-01-2004, 03:24 PM   #5
JWX
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Old 08-04-2004, 02:07 AM   #6
Calebz
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Location: Souf Central France
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1980 CB400 Hawk
1996 GrandCherokeeLimited

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Quote:
Originally Posted by americanyouth
OK, so I missed your crosspost from NA.

More advice : Remove engine, insert EA82T. Only about $500, about 50% more power or so, IIRC.

If only it were just that easy
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Old 08-04-2004, 09:24 AM   #7
jamesfacts
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98 RS
black & blue from parking

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Quote:
Originally Posted by Calebz
If only it were just that easy
Sure it is....
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Old 08-04-2004, 10:12 AM   #8
Calebz
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Join Date: Feb 2004
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Location: Souf Central France
Vehicle:
1980 CB400 Hawk
1996 GrandCherokeeLimited

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Quote:
Originally Posted by americanyouth
Sure it is....

Psssst.. hey.. over here...















What about the wiring harness? I've had one out.. its a mess.
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Old 08-04-2004, 02:09 AM   #9
Calebz
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Location: Souf Central France
Vehicle:
1980 CB400 Hawk
1996 GrandCherokeeLimited

Default

Quote:
Originally Posted by NitrouStang96
it just feels like it's only got like 50-75hp - the car supposedly only weighs 2000lb.

It DOES only have about 75 hp

and it weighs about 2400 pounds
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