Thread: '91 SE-R - Engine Wants To Take Off

I can get access to one if I ask around, and I have someone who mentioned they could make a pressure fitting to seal / attach to the throttle body.

The MAF may not have been a complete waste - I am able to affect RPM somewhat now with the idle set screw on the IACV. It is now down to 4500rpm.

I had it down to 3400RPM. But soon after, it would slowly climb back up to 4500~. I had replaced some hoses and lines and I thought I was good to continue going down, but now it's back up. Lower than it was last time but still ridiculously high.

There is a hose that comes off the intake manifold just after the throttle body, a small hose that exits the intake manifold pointing downward and toward the rear of the car. Does anyone know where this is supposed to be on a properly running SE-R? I want to make sure the routing is correct, as it could definitely cause an intake leak if wrong. Service manual does not elaborate.

Sounds like I can pressure test the intake system on Friday - it's the only other thing I can think of right now. Would there be some issue connected with this non-EGR JDM engine?

Here is a video now that I have the tachometer working. Notice how it coughs into life and THEN revs up. Any ideas?


I am hoping to pressure-test the intake tomorrow to either determine the cause or rule it out.

Just for sh**s and giggles, have you removed the throttle and cruise cables from the tb and tried to start it? Many times I have assumed that a problem was caused by something complex when in fact it was something simple. Start with the easiest, most basic things and go from there. Everyone including myself thought my problem was something much more complex than what it was. I went back to the basics and found the solution.

And on that note, you can also remove the dogbone link from the throttle actuator to the throttle plate. If it's bent, it will hold the throttle plate open.

C

Well that escalated quickly. It's not -smooth- yet but it's down. A little spring-loaded arm on the TPS may be the cause. If it is, I'm glad that I didn't find it first because there were a bunch of other very important things I fixed in the process - mainly a bad connection at the ECU. I couldn't help but notice while I was looking at the TPS that the throttle was very slightly not against its stop point. Removed the TPS entirely and the throttle definitely had more room to close. This idle is with the intake not connected and no TPS.

So the ONLY thing that changed between the first video and this video is that you removed the TPS and disconnected the intake?
How does it idle with the intake connected and the TPS disconnected?

Have u adjusted the screw that cracks the throttle plate? Maybe its cracked a bit since u can choke it out by blocking the tb

I adjusted the TPS and put it back in, with the TPS connected and the intake installed. It idles right where it should, but it hesitates a bit on revving. But it's progress! It runs the same with the TPS disconnected, do you think this is symptomatic of a bad TPS?

Have you checked it with a dvm yet?

I'm not clear on what the issue was. It sounds like you remove the intake and tps, put them both back on, and now it's basically ok.

C