Another S52 swap... but this time with a newb!

[jahnaboi]

To take the tranny off and double check everything. I have a slight noise when down shifting and using the engine to slow my car down (negative load) and its annoying me. So I want to get that out of the way so my subconscious mind could rest at ease.

[Mohammed_A]

Interesting... only thing is I checked everything with a straightedge and the intake manifold wasn't warped.

But I can tell you one thing... THE CAR RUNS AGAIN. Well it seems like I don't know what the fuck I did... but it obviously worked... Its weird because I didn't do anything but connect everything back the same way... Just put a little bit of permatex on every gasket for safety precautions and it worked out. I still have a slight hissing but All I could say is my power is back and everything is running smooth even with hfm connected.

good for you man..... whats next on the agenda?

[jahnaboi]

Interesting... only thing is I checked everything with a straightedge and the intake manifold wasn't warped.

But I can tell you one thing... THE CAR RUNS AGAIN. Well it seems like I don't know what the fuck I did... but it obviously worked... Its weird because I didn't do anything but connect everything back the same way... Just put a little bit of permatex on every gasket for safety precautions and it worked out. I still have a slight hissing but All I could say is my power is back and everything is running smooth even with hfm connected.

[Mohammed_A]

i had the same problem once with a m50 motor, my problem was the intake was warped somehow and even the gaskets could not seal it....

does your motor have a crank case valve??? if it does then check that...

[jahnaboi]

Lol... I wish I cracked the intake manifold... would be easier to deal with than putting it on and taking it off only to find out nothing ...

I triple checked the intake manifold for cracks anywhere and everywhere... even put Permatex everywhere where it didn't need any, be just to eliminate more probabilities...

[itsbrokeagain]

I checked the all the hoses that deal with any sort of vacuum. I removed the damn intake manifold off again...

While trying to diagnose the car while running, the noise sounded like it was coming from the rear half of the intake manifold... towards the firewall.

I'll try your method when I put it back again e30this. Even with the leaking vacuum sound, I found this much out... With the hfm plugged in... it ran like shit and would idle. When I unplugged it, the car immediately acted different and was more responsive... any ideas? Could it be a faulty hfm causing my idle problems/throttle problems? Don't see why it would work then the next morning not work....

could be..did you crack the intake manifold pulling it on and off by any chance?

[jahnaboi]

I checked the all the hoses that deal with any sort of vacuum. I removed the damn intake manifold off again...

While trying to diagnose the car while running, the noise sounded like it was coming from the rear half of the intake manifold... towards the firewall.

I'll try your method when I put it back again e30this. Even with the leaking vacuum sound, I found this much out... With the hfm plugged in... it ran like shit and would idle. When I unplugged it, the car immediately acted different and was more responsive... any ideas? Could it be a faulty hfm causing my idle problems/throttle problems? Don't see why it would work then the next morning not work....

[e30s52]

Idle air control valve. maybe it came loose and you have air slipping past it somewhere.

[e30this]

Did you try what I said in post 262??

[jahnaboi]

What do you mean is it still? At the time while the car was running it was still connected. Don't see what that has to do with anything.

By IAC I'm assuming your talking about the ICV?

[e30s52]

Is your IAC still hooked up?

[jahnaboi]

Hey bud, thanks for the compliment. As far as that hose, it is connected to the intake manifold but I'll try putting a clamp on it to make sure. This is annoying me so much... I wanna drive this thing!

On the brighter side... The temp gauge adapter works fine! Woot. Reads accurately too as anticipated. Also, my vanos rattle isn't present anymore! 30 bucks to fix that stupid shit compared to a dr.vanos unit. Although maybe down the line I'll grab a dr.vanos unit but not at the moment.

I'll try looking over everything again...

[vr4boy]

i had a vacuum leak at the one of the nipples on the brake check valve that caused my idle problem.
it doesnt looked plugged basing on the pic of your booster.
check it out....
btw:
i drilled and tapped my extra temp sensor in the head-was not too hard-make sure you're perpendicular to the drilling surface and go slow....
hope this helps and very nice swap;-)

[e30this]

What about the hose on the back of the intake that goes to the ICV??
If one of the clips is broke then it will cause idle issues. I had this problem with mine.

If you cant seem to find it by looking around then grab a can of brake clean and while the car is running spray it around all of the vacume lines and the intake.
If the idle jumps then you found the area where your leak is.

[e30serg]

Is the intake the only thing you removed? It's gotta be around there. No stethoscope? Maybe re-torque and re-tighten all bolts and clamps? Maybe you knocked something loose? If you can hear it without using anything to help, it must be pretty big.