Here's a video of it idling. I tried to use the idle adjust screw to get it to idle higher, but it still idles around 650-800rpm (stock ECU right now). The car sounds very loud at low RPM, and when I keep it at a constant speed it sounds very...bridgeport-ish. I was thinking it might be a half-bridge, or something that keeps the idle and low-speed driving somewhat normal. Here's a video of the car just idling.

http://s13.yousendit.com/d.aspx?id=2...W29B5WLNOUCPAU

 

Also, it's pulling only 200mmHg at idle. When I crack the throttle open a little bit and "idle" the car around 1200rpm, the vaccum goes down to 400-500mmHg.

 

Anyone have an idea of what it could be? It seems a little wild to be simply a streetport.

 

Sounds like a vac leak to me, honestly. Idle on anything larger than a street port is usually higher than the stock 800rpm. We'll wait to see what other people think tho first.

Check the TID for leaks or cracks to start.

 

Hmm, a vaccum leak? That would explain why it's hard to start when it's cold, and why it doesn't like idling while cold. I'll check the TID tomorrow, maybe start spraying carb cleaner in certain areas.

 

You positive it's ported? Doesn't really sound ported to me, just a TII that needs a bit of a tune up. Definitely doesn't sound like a bridgeport, lots of bridgeports idle much higher than that. And honestly, on stock ECU, if anyone is retarded enough to do a half bridgeport on stock ECU, I'd expect it to run horribly.

Also, in my experience if you have issues like a vac leak, TPS needing adjustment, and many other things, the idle adjust screw may not always do a whole lot for you. I had a TII customer car here recently that I was trying to adjust the idle of. I would turn the screw for days and it wouldn't change at ALL.

 

That's odd, the powerband of the car would suggest that the ports were modified (only really comes on power until about 5500-8000rpm), but I'll give the car a good tune up and see how that works for it.