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PostPosted: Tue Jan 26, 2010 12:18 am 
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When i got the GL, it felt quite nippy, but it hesitated on WOT for a split second, so i cleaned the carbs, and it felt MUCH more better! More power, ALOT more responsive!

So, heres what to do!

First, you want to remove the airbox! Pretty simple, 4 Clips and a wingnut in the center, just take off the cover and the filter! (dont even need to take it off, just let it hang down)

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Now, you want to remove the piston lids, 4 Screws, now, these can be a BITCH to remove, but ive sussed how to un-do them with ease! get a screwdriver and a hammer, and on each screw, give a couple of fairly good taps, this should shock the screw and should come undone with ease!

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however, if its a stubborn bugger! i got a Hammer and chisel, and made a new channel on the screw head, so it would accept a nice, flat blade screwdriver, came off with ease! be careful not to lose these screws!

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Once the lids off, youll see the following assembly, The Lid, Spring and Piston.

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Remove the entire assembly, its really easy to re-insert as the piston has a keyway and only really goes in one way.

Now, take the piston assembly, be careful not to bend the needle!

Look how dirty it is! the side caked in crap was the intake side, and the cleaner side was the other side.

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Now, get some carb cleaner and give it a good clean! spray the S*!t out of it!

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Look how clean it is!

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Comparison!
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Now, get the carb cleaner into the chamber, again, spray the S*!t out of it!

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Now, spray the piston lids, i found some crap inside the tube like thing in the middle, must of been carried by the piston, this could cause friction with the piston rising, which will lead to throttle hesitation :wink:

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Now re-assemble the piston and lid assembly, do not put the airbox lid back on yet!

Now, what to do next, is start the car (Mite take a few second longer than usual), hold the throttle at about 1/2 using the lever on the carbs, and spray carb cleaner into the opening, spray it till the engines about to die (dont let it die), then do the same to the other carb.

Hope this helps!

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1988 RT4WD Shuttle - Supercharged, VTEC Swapped Track Toy.
1988 RT4WD Shuttle - Lifted Daily Beater.


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PostPosted: Tue Jan 26, 2010 12:49 am 
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IS there any possibility that to much carb cleaner could damage a carb? the reason i ask is that i had a single carb ef1 that i sprayed the S*!t outta the carb on it seemed to get smokier after :lol: engine was fooked now, but it didn seem as bad before i cleaned the carb??


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PostPosted: Tue Jan 26, 2010 12:50 am 
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Ive done this to all the carbs ive had and fitted with no ill effects!

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1988 RT4WD Shuttle - Lifted Daily Beater.


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PostPosted: Tue Jan 26, 2010 12:57 am 
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guess it was just the engine so, wasn in it to long anyway :lol:


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PostPosted: Tue Jan 26, 2010 8:53 am 
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Gizmo bring out a book.


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PostPosted: Tue Jan 26, 2010 9:36 am 
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good little how to mate ill have to sort this on mine

ive been told u can also use petrol to clean carbs but not sure if that is true

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PostPosted: Tue Jan 26, 2010 11:22 am 
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Will have a go at doing mine this week 8)


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PostPosted: Tue Jan 26, 2010 5:09 pm 
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just finished doin my havent tested the car yet lol but damm they are clean now haha look like new just hope it helps abit with fuel consumpsation like it says on the carb cleaner can :lol:

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PostPosted: Wed Jan 27, 2010 12:46 pm 
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gotta say this is a wicked thing to do took the car out last night the throttle response is way better and my fuel is lastin way long :D i should of done this ages ago :lol:

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PostPosted: Thu Jan 28, 2010 12:43 am 
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how often should this be done to the carbs?


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PostPosted: Thu Jan 28, 2010 12:52 am 
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This was done @ 108,000 Miles, and thats the buildup as seen, the screws that screw the lid down were perfect, no signs of being undone before i touched them, so signs point they were never done.

I guess you could do it every 20,000 miles or so, but it only takes 5 minutes to do.

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1988 RT4WD Shuttle - Supercharged, VTEC Swapped Track Toy.
1988 RT4WD Shuttle - Lifted Daily Beater.


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PostPosted: Thu Jan 28, 2010 1:22 am 
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20,000 mile intervals sounds spot on.

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PostPosted: Thu Jan 28, 2010 1:23 am 
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Or even once a year will do? sorta like a spring re-fresh

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1988 RT4WD Shuttle - Lifted Daily Beater.


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PostPosted: Wed Mar 20, 2013 4:23 pm 
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really great thing to do made my car fell so much smother to drive. thanks for that.


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PostPosted: Mon Aug 26, 2013 12:33 am 
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after reading this earlier on I decided to try it, had a hard job taking the screw off the piston lids with all the vacuum pipes on the Jdm 1.5 but it was dead easy after that, and well worth trying the pistons were pretty grimy, feels a lot better driving now! had a job getting the passenger side piston back in for some reason even with the keyway lined up correctly but other than that it was a doddle, thanks again


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