83 12A No power
12-24-07, 09:28 AM
#1
Full Member
Thread Starter
83 12A No power
Let sit for 2 years
Started and idled good, but would hesitate when revved.
Accelerated good thru 1st and 2nd gear, then would barely run.
I rebuilt the carb and cleaned the fuel tank and lines and replace all fluids.
Now it starts and idles good and revs smooth.
But, no power even though rpms are high when accelerating. It acts llike I have the brake on, but the brakes aren't dragging. Clutch isn't slipping. Plugs look good.
Any suggestions?
Started and idled good, but would hesitate when revved.
Accelerated good thru 1st and 2nd gear, then would barely run.
I rebuilt the carb and cleaned the fuel tank and lines and replace all fluids.
Now it starts and idles good and revs smooth.
But, no power even though rpms are high when accelerating. It acts llike I have the brake on, but the brakes aren't dragging. Clutch isn't slipping. Plugs look good.
Any suggestions?
12-24-07, 12:54 PM
#2
How did it run before it was parked?
From this and your other post: Did/Have you:?
Changed the fuel fiter.
Was the tank drained, dropped and professionally cleaned.
Rodded out the metal pickup supply tube that goes inside the fuel tank.
Taken the carb completely apart during the rebuild and soaked it at least 24 hour
Cleaned/removed the 4 filter screens inside the carb.
Run a fuel flow test.
Checked the sight glass windows to see if the fuel level is remaining constant.
Checked the exhaust/cats for restriction/plugging.
If you haven't downloaded the FSM and carb manual yet, the link is in my sig.
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From this and your other post: Did/Have you:?
Changed the fuel fiter.
Was the tank drained, dropped and professionally cleaned.
Rodded out the metal pickup supply tube that goes inside the fuel tank.
Taken the carb completely apart during the rebuild and soaked it at least 24 hour
Cleaned/removed the 4 filter screens inside the carb.
Run a fuel flow test.
Checked the sight glass windows to see if the fuel level is remaining constant.
Checked the exhaust/cats for restriction/plugging.
If you haven't downloaded the FSM and carb manual yet, the link is in my sig.
.
.
.
.
.
.
12-24-07, 02:59 PM
#4
Full Member
Thread Starter
Changed the fuel fiter.
Yes
Was the tank drained, dropped and professionally cleaned.
Yes
Rodded out the metal pickup supply tube that goes inside the fuel tank.
No. I did blow it out with an air compressor to unstop it.
Taken the carb completely apart during the rebuild and soaked it at least 24 hour
Yes
Cleaned/removed the 4 filter screens inside the carb.
Yes
Run a fuel flow test.
No
Checked the sight glass windows to see if the fuel level is remaining constant.
Yes
Checked the exhaust/cats for restriction/plugging.
No. Other than sticking my hand over the exhaust, how should I do this?
Yes
Was the tank drained, dropped and professionally cleaned.
Yes
Rodded out the metal pickup supply tube that goes inside the fuel tank.
No. I did blow it out with an air compressor to unstop it.
Taken the carb completely apart during the rebuild and soaked it at least 24 hour
Yes
Cleaned/removed the 4 filter screens inside the carb.
Yes
Run a fuel flow test.
No
Checked the sight glass windows to see if the fuel level is remaining constant.
Yes
Checked the exhaust/cats for restriction/plugging.
No. Other than sticking my hand over the exhaust, how should I do this?
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12-30-07, 08:20 AM
#10
Nice catch on the troube shooting. 
Most members don't know that the carbs have a tps. You don't rreally need it if you strip the carb down and remove the emissions. If you want to keep it stock or need emissions, it usually never presents a problem or requires adjustment. Truth be told, I never would have suspected it. Thanks for posting back the solution, it benifits all of us.
Most members don't know that the carbs have a tps. You don't rreally need it if you strip the carb down and remove the emissions. If you want to keep it stock or need emissions, it usually never presents a problem or requires adjustment. Truth be told, I never would have suspected it. Thanks for posting back the solution, it benifits all of us.
01-01-08, 02:30 PM
#12
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Join Date: Jul 2005
Location: Atlanta
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Nice catch on the troube shooting. Most members don't know that the carbs have a tps. You don't rreally need it if you strip the carb down and remove the emissions. If you want to keep it stock or need emissions, it usually never presents a problem or requires adjustment. Truth be told, I never would have suspected it. Thanks for posting back the solution, it benifits all of us.
Most members don't know that the carbs have a tps. You don't rreally need it if you strip the carb down and remove the emissions. If you want to keep it stock or need emissions, it usually never presents a problem or requires adjustment. Truth be told, I never would have suspected it. Thanks for posting back the solution, it benifits all of us.
01-01-08, 03:36 PM
#13
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Join Date: Oct 2007
Location: beaumont tx
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ok i am having the same kind of problems out of my rx7 except that it won't run unless i am pouring gas down the carb any suggestions???? it would be very helpful and appreciated.
01-01-08, 04:41 PM
#14
In my sig is a link to the online FSMs and carb manual. Download both and familiarize yourself with the Nikki carb. The more you can help us, the better we can help you narrow down the problem without having to troubleshoot eveything on the carb or the entire fuel system. Year of car and mods will help too.
Welcome to the forum and the Darkside.
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01-01-08, 10:25 PM
#16
Full Member
Thread Starter
I went through all of the adjustments in the carb manual. When I got to the adjustment for the TPS, I found it was sticking. I took it off and sprayed it with contact cleaner until it quit sticking.
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