Added a PCV system now two cold cyl???

[kchaser]

So. Questions for the engine gurus. I have a 302. Had it built ahh about 15 years ago. It started in my bronco when I was mud racing in Wisconsin. Then into two different ice racing cars then a 1980 and 1984 tough truck bronco. So it has lived it's life at 6000rpms +++. Long story longer. It's been back in my bronco for 5 yrs or so running like day 1. I just put a PCV system on it and after cleaning it up changing oil and stuff I took a measurement of some header temps to make sure all were firing and hot. Well two cyl are about 1/2 as hot as the others. Funny thing is if I pull the PCV and plug the line the temps instantly rise. Can the PCV be pulling the mixture away from the cyl or something? I need to do a compression test yet but maybe rings are shot. Any ideas? Valves are adjusted and moving. Just weird that a PCV would cool the temps of only two cyl down. One on each side of engine.

[Viperwolf1]

Could be. Is the vacuum port common to those two cylinders and further from the others? Best place for PCV vacuum is at the carb base for even distribution.

[kchaser]

It's #4 and #7. I put it directly into the intake. Maybe too much vacuum. I changed it to the air filter housing and everything is as should be. Have to go beat on it to see I guess.

[Kinder]

My prev PCV was pulling from the carb spacer, then the other side vented to the air cleaner housing, set up from the factory.

[Viperwolf1]

It's #4 and #7. I put it directly into the intake. Maybe too much vacuum. I changed it to the air filter housing and everything is as should be. Have to go beat on it to see I guess.

I don't see it working if it's plumbed to the air filter housing. Not enough vacuum there.