That's exactly what I had happened when I blown my apex seal. You can try to adjust your air/fuel.
I've done swapping of Jspec rebuilt with adjustments (of course), my idle is exactly at 750 all the time exception of during warm up.
And it is certain that vac lines are all intact without any of them gotten loose? What size of hose have you used to replace that?
Most recommend 3.5mm instead of 4mm as it seem to come loose. And I was recommend to use Hose Tech silicone hoses and I'm quite impressed with their products (I think they are way proud of their stuff considering what they are charging...hehe)
And don't go with them cheap silicone hoses as it only has 300 degree max temp compare to Hose Tech's 500 degree tolerance.
And, yes I thought of coolant seal...ck thru filler cap and see if you see little bubble rises as it is an indication of coolant leak. Or pressure test it. Either way.
Have you done compression test?
Also how does your oil look? smell of gas, gunky...etc. That tells you a lot.
Keep me informed!
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