1993 300zx NA Egr and coolant delete revs to 2k/3k rpms

[Z32Zop]

1993 300zx NA previously bought and brought back to SC from FL. 8 hour drive completely fine. Car has 108k miles 5 speed and was running no problems before I did my egr delete and coolant delete. Originally I never wanted to do plenum deletes but after having a leak in my valve cover gaskets I decided to do it all together. And just taking the plenum off was really hard because of coolant lines. I the leak wasn’t really bad I just wanted to make my car all nice and mint before slammednuff this year. Ok so anyways I begun with taking the plenum off which took me like a day after I got it off I took all the coolant line off then re routed the 4 lines closer towards the firewall and just connected them with 2 hoses. I took of the valve covers cleaned them up and put RTV on the 2 exhaust sides and rubber gaskets on manifold sides. Put those back on. A day after they sat I realized I forgot on of the hose in the driver side valve cover so I tried to squeeze it in there and managed to get it on. It is cut and opened a bit but I’ve clamped it and zip tied it. Not sure if this would be the cause of a 2/3k rpm. Anyways I started to put the plenum on when the egr tubing on the side the driver side was completely bent wouldn’t go into the plenum so I cut both side pipings and capped them off with jb weld, RTV, and rubber caps. The egr valve line was cut from previous owners. I put the block plates on egr and put everything back on. Forgot to mention but plenum gasket was replaced aswell. I put silicone grease on all connectors and everything was back on. First start and the car revs from 1500rpms to 3000 rpm’s very quickly and it will keep doing that. I checked the engine bay and it’s hard to tell sounded like balance tubing at first but I tightened all bolts and put bracket on top of the balance tube put some rtv and still revved high, I tightened all hose clamps and pushed all connectors and intake pipes, vacuums all into place. I do have missing aiv and prvr vacuum and missing aiv solenoids, couple of my lines are exposed that are on the side solenoids. I can still drive with my car idling like this. But it wants to push itself like it’s idle fluctuating while driving even in nuetral driving just fluctuates idle. If anyone can help me that be awesome I have a YouTube short on a couple of the startups and problems I had that could help for a solution. Please get back to me asap I know it might be hard to get info on a 30 year old car but anything would help. Got school coming soon and want to get the z running just like it was before valve cover gaskets, egr and coolant line delete

https://youtube.com/shorts/2UHjSI_Fpx4?feature=share

[AZhitman]

My first inclination is to direct you back to this point:

"It is cut and opened a bit but I’ve clamped it and zip tied it."

Not OK. Pull the plenum again, fix it right. There's a reason all that stuff exists, and when it's removed from a pile of spaghetti (like a Z32 engine bay) there's bound to be something missed. In this case, you have a good size vac leak, and although it may not be from the valve cover connection, something got missed.

[Z32Zop]

Yea I agree I’ve replaced the cracked hose and still am having the idle problem… idk if it would be from the solenoids missing lines or the egr. I checked tps was at .78 I got it to .42 nothing worked gonna have shop diagnose it for me. It just doesn’t make since coolant lines I’ve rerouted seemed to be doing a good job beings I’ve driven my car for the past 2 weeks and gauge is fine. Egr shouldn’t be problem, block off plates were put on and all piping was cut off and capped besides the exhaust manifold was just left on. In the morning when I start it. It revs and stays at 3k rpm’s until it warms up then fluctuates 1.5k to 3k rpms.