EGR boost leak?

[SrBigbutt]

Been trying to track down all of the boost leaks in my 88 turbo. So far i've replaced intercooler pipes, accordian hose, vacuum hoses, and tightend loose lower/upper intake bolts. This thing had a bunch of leaks. And still does.

I need to replace my ISCV gasket. But I also think something in the EGR system bay be leaking. When I hooked up the tester I could smell exhaust gases coming from the EGR area and feel some air down there. I couldn't see anything but I think its leaking down there. When I pulled the vacuum line it would stop. I don't think its the injector seals, because they are new. Any ideas?

 

[SrBigbutt]

Anybody?

 

[adampecush]

verify the operation of the egr system as per the TSRM. IIRC the vac actuator will leak boost during a test with the car off (mine did)
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=EC&P=18

 

[jetjock]

I dunno where your leak is but the EGR valve has a large diaphragm for a reason. Pressurize it too much and you'll be buying a new valve...

 

[SrBigbutt]

Well I fixed my ISCV gasket leak....but I'm still having some issues. I'm guessing its still got a boost leak somewhere. It doesn't feel like boost cut though. Just feels like it loses power and if I keep my foot on it I get a surging.

Guess next is to check the EGR area for boost leak?

 

[SrBigbutt]

I've been reading up and I think it may be the spark plugs. I replaced the plugs and wires with stock NGK's but they may need to be regapped. Going to check them and put them to .028 and see if that helps.

 

[mk3bandit]

i might also be having the same issue as you do. but ive got platinum 4's in mine. dont know if the helps or hurts it. it ran better after i put them in it a year ago so i dont know. hope you or someone can help you out on a cure for it.

 

[SrBigbutt]

Damn, they were already gapped to .028. #6 was a little fouled. The rest were ok. This is frustrating. I've never felt the full power of my car. Should I regap them smaller, try different plugs?