Slowly but surely I'm getting the bugs worked out on my S50. A bad fuel pump connector there, seized ICV over here, and now a sticky throttle.
Let me explain. When I first started the motor for the first time it wouldn't stay running due to a bad fuel pump connector. Fixed that, it worked perfectly. Now I had the issue of a not so great idle and hunting. Took a look at the ICV (I had my doubts when I installed it in the first place) and could see that the valve was stuck half way open. I tried freeing it to no luck, so I installed a brand new ICV. The S50 idled and ran great after that, sort of. What I have now is an engine that holds what ever revs you push it to and keeps it there for a few seconds till it drops down to 500 rpms and back to the perfect idle. There's no missing, pinging, back firing, nothing. It just won't rev back down.
I decided to run a stomp test. No dice, I can't get the CEL to light up. It's hooked up correctly and comes on when I first turn the ignition, but nothing after that. Thinking it might have been a TPS issue, I replaced that with a known working one. Still no change in the CEL or the engine's state.
So since all the other engine systems/sensors are running perfectly and/or new, the red label 413 ECU I'm using is my last guess in what could be at fault. The throttle cable is completely loose right now, so don't say to check that. ;)
Any ideas? :???:
Let me explain. When I first started the motor for the first time it wouldn't stay running due to a bad fuel pump connector. Fixed that, it worked perfectly. Now I had the issue of a not so great idle and hunting. Took a look at the ICV (I had my doubts when I installed it in the first place) and could see that the valve was stuck half way open. I tried freeing it to no luck, so I installed a brand new ICV. The S50 idled and ran great after that, sort of. What I have now is an engine that holds what ever revs you push it to and keeps it there for a few seconds till it drops down to 500 rpms and back to the perfect idle. There's no missing, pinging, back firing, nothing. It just won't rev back down.
I decided to run a stomp test. No dice, I can't get the CEL to light up. It's hooked up correctly and comes on when I first turn the ignition, but nothing after that. Thinking it might have been a TPS issue, I replaced that with a known working one. Still no change in the CEL or the engine's state.
So since all the other engine systems/sensors are running perfectly and/or new, the red label 413 ECU I'm using is my last guess in what could be at fault. The throttle cable is completely loose right now, so don't say to check that. ;)
Any ideas? :???:
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