Vacuum line elimination, keeping EGR

[WatchItExplode]

I want to do the vacuum line elimination like this http://www.taboospeedshop.com/emissions.htm but keep my EGR system for emissions reasons. All these big jumbles of lines confuse me....can somebody tell me how to eliminate everything except what is needed for EGR?

 

[1SloColt]

I actually did this yesterday. I have a 90 motor but maybe this will help. I Started with the charcoal canister and the vacuum tree that is connected to it. I removed the line going from the tree to the intake pipe and plugged that. I unhooked the tree from the canister and pulled the canister so just the tree was in the car while I do the rest of the lines. Then there were four lines that went to my throttle body, two on the top and two on the side. I pulled those lines off and cut 2 4" pieces of the remaining hose and connected the two top nipples and the two side nipples together. Then there was four lines going to my thermostat housing that y-ed down into two lines. I took those off and took a 4" piece and connected those two nipples together. Then was the EGR valve underneath the intake manifold. I took those two hoses off and connected a piece of hose to those two nipples but then decided just to block it off with a plate I made out of tin metal from a cook can. There were 2 more lines under the intake manifold which I unhooked and plugged as well. This freed up a lot of room and I still think I can get rid of the fuel pressure selenoid but I kept it for the time being. I used the directions from taboospeedshop just as a guideline and I had no real clue to what I was doing. I have seen a lot of pictures of it done and kinda went on my own. Car runs great and I don't have any problems. There was one line that is a breather line to the gas tank and I just left that open so it can vent.

 

[WatchItExplode]

Thanks for the help, I'm going to see if I can figure it out.

 

[j_choate69]

I did this mod as well and I used a coke can (actually a sprite) but I just wanted to warn you guys, you need something a little thicker for the blockoff. I threw a CEL so I went back in to see if I had a leak and my blockplate had a perfectly round hole melted through. I used sheetmetal and it works great. Other than that it was just like you guys have said basic guesswork.

 

[Screamin Eagle]

You don't need anything thicker than a coke can, just make sure to put some rtv sealent on it when you block it off. For the first poster, you can remove 2 more vaccum lines from the fuel pressure regulator that go behind your intake manifold.

 

[WatchItExplode]

Ok I was looking at my engine and I think the previous owner might have done some kind of vacuum line elimination already

behind the intake manifold, the two lines on the bottom are gone, and it appears that some of the lines that connect to the throttle body might have been leading to nowhere. I'll try to post some pics.

 

[JiveMasterT]

Ok I was looking at my engine and I think the previous owner might have done some kind of vacuum line elimination already

behind the intake manifold, the two lines on the bottom are gone, and it appears that some of the lines that connect to the throttle body might have been leading to nowhere. I'll try to post some pics.

please do.

 

[WatchItExplode]

Sorry it took so long to get the pictures. As you can obviously see, the engine is outside my car right now.

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Notice the two bottom nipples have nothing connected to them, on either side.

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The big jumble that confuses the hell out of me.

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This nasty thing wasn't connected to anything on this side. The other side was on the TB nipple labeled "P".

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One of these lines connects to the EGR thingy on the intake manifold. The other one connects to the A1 nipple on the TB. The nipple on the side, as you can see, is broken off or something. The other line coming from the EGR thingy also was connected to nothing, it was all nasty looking like the one above.

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I think this is the boost control solenoid, right? One of the lines has a screw in the end, the other is open, so I guess it's doing nothing.

Please let me know if you have any helpful info or anything.

 

[sweet97]

I hooked up my EGR for the increase in gas mileage it is supposed to provide but I may have it wrong, can someone confirm? I have the front nipple of the thermo valve split and connected to the top of the EGR and the 3rd nipple back on the TB. The rear of the themo valve to the lower/front of the EGR and also to the 2nd nipple back on the TB. In the pics it seems the line with the blue stripe goes tothe rear or top nipple of the EGR. I believe I have it opposite?! Mark

 

[WatchItExplode]

Somebody told me that without the EGR, you actually lose milage, but that doesn't seem to make sense. I must knowwwww. WTF

 

[JiveMasterT]

Somebody told me that without the EGR, you actually lose milage, but that doesn't seem to make sense. I must knowwwww. WTF

Well, somebody told me that you had a boyfriend who looked like a girlfriend that I had in February of last year...


uhhhh, anyway.... i guess ive been listening to the killers too much............

yes, getting rid of the egr does make you lose gas mileage, but i forget why. i know when the egr system was messed up on my van it got pretty junky gas mileage.

 

[Wing0tj]

the egr recirculates a small amount of exhaust which has some un-burnt fuel into the intake... I dont think on our cars it would affect mileage that much tho, I have mine blocked off and I get great mileage.

 

[sweet97]

Somebody told me that without the EGR, you actually lose milage, but that doesn't seem to make sense. I must knowwwww. WTF

The exhaust gasses that the EGR allows into the intake will in effect decrease the engine size since less actual fuel can then fill the cylinders. The EGR does not function under WOT so there is no power loss. However there will be a certain amount of soot that wll enter the intake and cylinders. I am willing to accept the trade-off and have my EGR back functioning as far as I can tell from the vac line diagram under the hood. mark
PS: I have read of one guy who went from 19MPG to 23MPG.
Exhaust gasses cool the cylinders which can stop part trottle knock.

 

[mysticfire6602]

how is braking without vacuum lines? how do you even produce vacuum to certain areas (brake booster for instance) without vacuum lines?

 

[sweet97]

how is braking without vacuum lines? how do you even produce vacuum to certain areas (brake booster for instance) without vacuum lines?

The lines removed are to disable the emission items, not the brakes! Mark

 

[mysticfire6602]

ah, ok. i saw the title and it just said vacuum line elimination, so that made me think ALL vacuum lines.

 

[sweet97]

ah, ok. i saw the title and it just said vacuum line elimination, so that made me think ALL vacuum lines.

Click the link in the original post.

 

[mysticfire6602]

no, no, i get it now. i was only saying that i normally see these kinda threads called emmision line elimination or something like that, and i was really tired, so i was completly out of it. now i realize it

 

[thegreatms]

Exhaust gasses cool the cylinders which can stop part trottle knock.

Exhaust gasses cool the cylinder? From what I know exhaust gasses are usually hot...


Some do say that because the exhaust gasses are inert; they make the air/fuel mix less susceptible to pre-ignition (which may have been caused by hot spots) and less pre-ignition will cause you cylinders to have less hot spots. But I wouldn't say that the exhaust gasses directly cool the cylinders.

 

[WatchItExplode]

PS: I have read of one guy who went from 19MPG to 23MPG.
Exhaust gasses cool the cylinders which can stop part trottle knock.

So what you're saying is, the guy's gas mileage went up 4 MPG after getting the EGR system working?

 

[sweet97]

That's correct. It's no secret that a functioning enhances mileage that's why I have mine functioning as I bought the car with it disabled. I read about the guy with the 4MPG increase on www.fullthrottletech.com perhaps itis in the forum still. I may do a search there and see if I can find it. I have not had mine functioning lon enough to do some testing. I would have to do a month with it working and a month not and compare the differences in mileage. Since at WOT it does not work performance is not affected. Mark

 

[guitarXgeek]

A malfunctioning EGR will cause gas mileage to be down the drain. A blocked EGR won't be quite as bad. Either make sure it's working well or block it off.

 

[half-cocked]

behind the intake manifold, the two lines on the bottom are gone, and it appears that some of the lines that connect to the throttle body might have been leading to nowhere. I'll try to post some pics.

The bottom 2 lines are only used in Ca emissions cars.

 

[WatchItExplode]

The bottom 2 lines are only used in Ca emissions cars.

Oooh okay, that explains a lot. Thanks.

 

[steve-o_95_GST]

A malfunctioning EGR will cause gas mileage to be down the drain. A blocked EGR won't be quite as bad. Either make sure it's working well or block it off.

how do you tell if its malfunctioning? are they suppose to make a clicking sound? one of the 2 solinoids*sp* that are on my firewall clicks is that normal?