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Thanks for all the replies! This is my 2nd or 3rd time replacing this gasket (not for this reason exactly)... Last time I used the rubber seals and had bad luck with them. The rear seal ended up leaking oil out a corner. This time I just put a thick line of GM engine sealant (gray in color...

This post didn't get much attention in the general forum so I thought I'd try here. Here's the original post: Hey guys, I've been troubleshooting a vacuum leak for quite some time now and finally decided to make a custom pressure block off for the intake tract. I pressurized the system to...

Hey guys, I've been troubleshooting a vacuum leak for quite some time now and finally decided to make a custom pressure block off for the intake tract. I pressurized the system to about 15 psi, sprayed soapy water around the engine and found leaks at the vacuum block, at a vacuum line, and at...

Ok thanks. No pretty sure its not. I don't know how someone describes engine knock but Im positive that is what it is.

Yes, this is the circular thing that sits above the drivers side valve cover right?

Really? That is interesting. I will look into this more. I know that it affected the IAC. It didn't seem to affect the BLMs but I will have to leave it in for a while and see if any thing changes as I drive it. The car is at my parents house so I usually only work on it on the weekends.

Like I said it was plenty tight when I installed it but you could be on the right track. Is it possible to reach the knock sensor with removal of the coil back and bracket? I really don't want to pull the engine to check the knock sensor...

So, what does this lead you to believe?

No it was wrench tight. 14 ft/lbs is not that much, I don't know if that is the issue but possible. As far as the vacuum leak situation goes, I just decided today to swap out my pcv valve from rjc to the stock one that was on it prior to the rjc. I did notice that the IAC number was in the...

TPS is .40 which is perfect. Posted from the TurboBuick.Com mobile app

I am still having the same issues as last summer. The progress that I have made up to now has included replacing the intake plenum gasket and making sure it is tightly bolted down, I have new intake hoses/ clamps, I just tested the MAF with another original from a t type owner that I know and...

Does your engine leak at all? That is a unique setup... Thanks for the info everyone.

I still have the stock oil filler tube and a make shift vent on the passenger side as I have deleted the connection from the turbo. What is the best vent/seal for the stock valve covers on both passenger and driver side? Both of these areas leak and I would like to fix that issue. So What...

At idle im still at 142 blm and 00 iac.

Was able to install a fuel pressure gauge. Line off at idle - 42 psi. So It looks like the fuel system is pump is good.

Tonight I recorded a 760mv but usually it seems closer to 800. I would say it's usually in that range, sometimes over 800. Should that mixture be more precise than that? Like say a number right on the dot every time? I checked for leaks around the PCV valve and it looked fine. The valve is...

Been doing the carb cleaner test on problem areas and I cant find anything. The metal vacuum lines seem good. Turned boost down today to 11 and did test run. Same situation as I described before. Can hear ping coming out of turn going wot. No reading on SM. Other times I saw 1.6 deg...

Why would you want your car to run at 226 degrees? That doesn't seem right.

The vacuum block gasket and TB gasket are newer, along with the rubber hoses coming off of the vacuum block. The hoses are tight. I doubt the metal lines are cracked but I suppose that could be a possibility. I will check that again. Could the intake hoses be a problem if they are not 100%...

Here are some numbers from the scanmaster at idle: AF - 04 L8 - 26 INT - 128 BL - 142 IAC - 00 CC - always changing. BL is higher so this means I must have a vacuum leak somewhere? What are common areas too look? Thanks.