DYEOne18

Got an 86 S4 N/A, was wondering about putting and EGR blok plate on and removing the valve of course. Curious of the good and bad sides of doing that. Another thing, I posted earlier about my ACV wiring shorting. Could I block that with any good or bad sides to it. Should I just replace the valve and call it a day. Looking for something decent to do to the car besides changing injectors and the fuel pump. Got a cat back on it already. I love how my twin loop muffler sounds.

DYEOne18

Sorry I was thinking about getting this car. Mine is a 87 not a 86.

NJGreenBudd

iTrader: (1)

Both EGR and ACV are for emissions. Removing them will not increase the performance of your motor at all. Removing them will cause you to fail inspection.

You can remove them and replace with block off plates but then you might as well remove a lot of other things (like the air pump, the catalytic converter which will clog without air pump which is useless without the acv, the rats nest and associated solenoids) since your car will no longer be a street car.

Why are you changing the injectors and fuel pump? You said your car is Normally Aspirated, that means it runs pig rich stock and the very last thing you should be doing is trying to add more fuel, unless it's been ported - which it probably hasn't. You have an NA, don't think of it as a race car, but there is a thread around called something like Building a Beefy NA that would be good for you to read.

I think you need to read up a bit before you do anything to your car. There is some good info in the FAQ about general maintenance and good modifications to stat with. You should generally get the car in perfect running shape, then get the suspension, brakes and drive line up to par before attempting to get more power.

So, long story short, I would keep the EGR for now, fix the wire on the ACV and keep the rest of the car stock until you have everything in top shape. Start with a 60K tune up, new belts, new hoses, new vac lines, new fluids, plugs, wires, air and fuel filters, gear oil in trans and diff, new shocks and bushings, etc....


Please post pics of your car.

wogboy_9000

Ive recently installed a block off plate, and removed emissions, what would be the symptoms of the plate not fully sealing? would it make a hissing sound, stop then hiss again?

thanks

younG_Gunner

iTrader: (2)

I'm no emissions expert, but the hissing sounds like its not fully sealed. If it is leaking, it could be cause erratic/high idle.

wogboy_9000

ah ok... well im not entirely sure where the hissing is coming from. I might just try and coat the plate in high temp silicone.

Can anyone else shed some light on this?

NJGreenBudd

iTrader: (1)

You can either use a new OEM gasket, cut your own gasket or use black RTV. Make sure the bolts are tight and that there weren't any chunks of old gasket or anything to stop it from sealing properly.

You will also have to deal with the associated vacuum lines that run to all these emissions devices if you remove the. Make sure you cap the nipples where the lines used to be.

wogboy_9000

Yep thanks. I've already removed all emissions (except BAC, ACV & AIR PUMP (last two are on their way to removal)), made a EGR block off plate, installed it with $50 a bottle RTV. Thinking about reinstalling my dashpot because it bucks badly.

I'm just not sure if my EGR plate is sealed correctly, the idle is abit up and down, but not surging. TPS is properly adjusted. Not exactly sure what to do?

OutCold

Im prepared too get flamed, but what does a Block Off plate actually do?

Syncro

iTrader: (1)

When removing something (EGR for ex.) you install a block-off plate (a metal plate in the shape of the EGR's base) to cap off the hole in the engine\whatever.

NJGreenBudd

iTrader: (1)

You could use an unlit propane torch to probe around the EGR block off plate and see if the idle reacts to the fuel. Just crack the gas open to when you can hear propane come out and then stick it by the suspected vac leak.