Oil leak, rear lower intake.

[91CoupeMike]

Yes. Not a big fan of tunes on fox stuff but yes you can get it done. You should have put a adjustable reg on it.

I was going see if the stock fpr and if it needed more afterwards go with adj.

[FastFox]

Intake Leak

What FastFox says
Do you recall how much silicone-sealer you used?
Should be a thick bead across. G/L

I used cork gaskets and a VERY thin film of sealer. Too much sealer, and the gasket will crawl .

[Diabolic]

I don't run an adjustable regulator aon anything I have or have had. I honestly don't see a need for one. That's just my opinion. I screwed a barb into the side of mty RPM II intake and connected it to the filler neck on my VC in the Cobra. I never had any issues with it that way. The factory setup in the 94-95 Cobras puts the nipple about 8" in front of the tb in the intake tube. The lean issue could be caused by a slight miss. there are many reasons for the miss. I would be curious to see what your AFR looks like in open loop during idle conditions. I would like to know if it's really lean. Maybe for some reason your cas is going into open loop on occasion.

[91CoupeMike]

I don't run an adjustable regulator aon anything I have or have had. I honestly don't see a need for one. That's just my opinion. I screwed a barb into the side of mty RPM II intake and connected it to the filler neck on my VC in the Cobra. I never had any issues with it that way. The factory setup in the 94-95 Cobras puts the nipple about 8" in front of the tb in the intake tube. The lean issue could be caused by a slight miss. there are many reasons for the miss. I would be curious to see what your AFR looks like in open loop during idle conditions. I would like to know if it's really lean. Maybe for some reason your cas is going into open loop on occasion.

On bank 2, in open loop (first start) it fluctuates between 14:1 - 15:1 at idle. The only time it shows lean is when it's hunting for idle and surging.

System voyage goes low because my belt is slipping on the alternator.

[91CoupeMike]

Mind, I deleted the egr, so the computer should be looking for egr signal. It's my understanding that when an egr is inoperative it will run rich.

~14:1 cruising down the highway. At wot it shows 12-12.5 the entire pull.

[jackass racing]

motor is prolly worn out and creating more crank pressure than pcv can handle......as G.. said

[91CoupeMike]

motor is prolly worn out and creating more crank pressure than pcv can handle......as G.. said

Possible although I wasn't having any issues before hand. But it's a pissiblity.

A loose motor is a fast motor!

[91CoupeMike]

So I did not have the pcv filter, I don't think it will help anything. And I don't think the seal is blowing out, it's just leaking. It's dry everywhere, smoke comes up from it running down the block, rolling off the starter right onto the header tube. I'm thinking It smokes at wot because more oil is flowing, more leak and more heat so more smoke!

Lets hope!

For as far as blow by goes, at idle the oil cap has vacuum, but I know at rpm is when it's more prone to blow by.

I'll post up after I fix the leak, install the filter and add a hose from the valve cover.

[MattB]

You should race more people in it on the street.

[91CoupeMike]

You should race more people in it on the street.

They say I'm 2 steps ahead of you already pal.

Don't treat me like vin diesel, I'm not that cool yet.

[shumpertdavid]

[QUOTE=91CoupeMike;977505]So I did not have the pcv filter, I don't think it will help anything. And I don't think the seal is blowing out, it's just leaking. It's dry everywhere, smoke comes up from it running down the block, rolling off the starter right onto the header tube. I'm thinking It smokes at wot because more oil is flowing, more leak and more heat so more smoke!

Lets hope!

For as far as blow by goes, at idle the oil cap has vacuum, but I know at rpm is when it's more prone to blow by.

1, the pcv filter will help keep pcv system from pulling oil droplets into/through the intake.

2, the silicone/block seal is fighting 2 battles right now explained in # 3 and 4.

3, The oil leaking more at higher rpm isn't because of more oil flowing, it's because of more crank case pressure. At wide open throttle there is no vacuum being produced in the intake, as you've already noted. Because of this, blow by (it occurs naturally and is increased by age and engine wear) and the pressures created by the rotating assembly build inside the motor. IT WILL FIND IT'S WAY OUT SOMEWHERE.

4, Since you are only running a pcv valve and no vent (the tube that used to go to your throttle body) you are allowing excessive vacuum to pull on the inside of the motor at idle, cruise, and decel (heavy decel from a high rpm downshift can pull 26-28 inches possibly). This can physically suck seals and silicone sealed areas in. Secondly it has the opposite effect under wide open and low vacuum times. Now you are creating pressure with no natural way to vent, pressure builds and it's gong to push something out.

Now as far as Diablolic is saying about connecting the vent side to the intake, I feel he is incorrect. This is going to create a vacuum leak in a sense because now you are pulling full intake vacuum on the crankcase and not giving it a vent source. Someone else correct me if I'm wrong.

[Diabolic]

The air it's pulling has already been metered. I have literally dozens of hours datalogged in my cobra and noted no change in part throttle nor wot AFR changes when moving the hose to the rear of the tb. No change in the LTFT's. Just my personal experience here.

[Blackpony]

Tie the valve cover into the induction in front of the tb. Sn95 cars are done like this from the factory. PCB at the rear of the intake ties into the upper plentum with full vacuum at idle.

[91CoupeMike]

My question is, why does it matter of its before or after the throttle blade?

When its wide open it shouldn't matter?

I couldn't see before or after the MAF, but since the air is already metered it shouldn't matter?

Fill me in here guiz

[Blackpony]

After the blade is a vacuum source, before is not. There is no need to have to vacuum lines running to the crankcase. The pcv line is plenty sufficient to evac at idle. Before the blade it will still evac under wot.