i see thie topic is covered alot but i did not find a thread that covers my specific problem.

86 gxl with new exhaust system from headers back. No cats, just test pipe. So obviously there is no split air tube to go from the cat to the aux port ( rear one closest to firewall ) ive tapped into the hose off the air pump and that seems to open the port closest to the firewall, but the port on the front of the motor, closest to the air pump, and 10 thousand times more of a pain in the dick to get to is not moving. i will watch the ports as i increase RPms with the throttle cable and i see the one in the back opens what i assume properly, but the front port does not move or open at all.

1. since i have no cats and a full stainless 3" exhaust i get ALOT of complaints about noise in my little town, so today i went and ordered an OEM CaT just to quiet it down a little ( and make it legal at least ) I will hook the ports back up correctly like they are SUPPOSED to be, but im afraid from having no cat and the ports not opening for a long time untill i rigged it the way it is that front port is seized right up, what do u recommend i do about this one port not opening?

 

Nopistons85, this has definitely been covered before. The only way to thoroughly fix your problem is to take the intake manifold off and get to the auxiliary port valves and remove the carbon off of them and the passages in the irons, lube things up and replace any gaskets touched. Worth the work.

 

I don't believe you have to take the intake manifold off to get to them. If I remember correctly, you just take the actuators off and you can access the ports from there.

 

thats what i was thinking, i dont see how taking the intake mani off to get to that front port since its no where near the manifold, its a bitch to get to, the intake box has to be removed and probably the hose from the air pump, but yeh i didnt know if u can just take the acuator off and fiddle with it or what, so u believe it is carbon keeping it from opening? should i take it off and let it take a bath in some sea foam or something to that effect?

 

I had the same issue on my N/A. They jsut get old and they get stuck. You can take them off without taking the manifold off. You should be able to move it yourself while it is still on the car. If you can't, then it is stuck. I used some lubricant/cleaner and force to get it moving again. It is a good idea to pull off and clean both of them.

 

You can clean the actuators without removing the manifold. But usually the carbon buildup and stuck-ness is on the actually sleeve itself, which requires pulling the intake manifold.

When you remove the actuator, turn the rod by hand and see if it spins freely. If not, you need to get in there and clean up the sleeve.

 

What he said ^

The sleeves, which is usually what gets stuck, is actually inside the irons and you have to remove the LIM to get to it. If you think otherwise then you have never taken apart a rotary engine.

First though, make sure that the actuator isn't the problem.