what are these and can i do without them?

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Swifty

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Jan 13, 2011
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Couple things here I'm not sure what they are for. Wondering of I can delete them. Trying to clean the engine bay up a little.
IMAG0015.jpgIMAG0016.jpgIMAG0014.jpg
The sensor on the back of the power steering pump is broken and only has one vacuum line going to it. It's connected to that vacuum assembly that mounts to the bottom of the plenum. I want to remove that entire mess but those other two sensors are also connected to it.
 
stevenr816

stevenr816

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Feb 12, 2007
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#1 Power steering idle up valve. Yes, you can remove, it will just idle down alittle bit when you turn the wheel at idle. Remove and block the hose off from the accordian hose, as well as removing and blocking off the metal tube that runs accross the front of the timing cover.

#2 Looks like ac related, so if you still have ac dont remove, if you dont then take it off.

#3 Fuel pressure up and egr vsv (assuming its a gte) if you dont have emissions stuff take the egr one off along with blocking the lines. if you do have it leave alone.
fuel pressure vsv, take off and run a line from the fpr to manifold
 
Poodles

Poodles

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Jul 22, 2006
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- Stock ECU is tuned for EGR (and no, it doesn't give you more power to remove it).
- Fuel pressure VSV helps on hot starts (the one time it doesn't start because you deleted it you're going to hate yourself).
- Power steering idle up valve missing might be an issue if you don't give it a little throttle when you're steering around a parking lot. Potential to stall.
 
stevenr816

stevenr816

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I personally have driven with all them off with no changes to worry about. Not to mention both of my vsv's were bad.
True on egr, helps with mpg, only killed mine 0-2 at the most. But if your going for the clean look it's something you will have to sacrifice.
 
8

89nasupra

Sugar, Water, Purple
Apr 8, 2008
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Swifty, If I were you I would listen to Poodles, I deleted alot of shit off my car and I'm kicking my self in the ass for doing it. No it doesn't stall or anything it runs fine for the most part but after reading through a few threads here and realizing that the engineers at Toyota put those items there for a reason I'm starting to gather all the things I took off to put back on.

Yes you need them, Yes put them back on or leave them on. If they are not working I'm sure someone here has what you need to fix it properly. Don't "half ass" your car. You will regret it in the end.
 
Poodles

Poodles

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Jul 22, 2006
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"I did it and it's fine" doesn't fly here. The ECU is tuned for the EGR to be there. Under part throttle load you run the risk of detonation from the advanced timing and lean condition (as it's expecting inert exhaust gasses to be there). It lowers EGT's as well.

You have 4 options:
- Keep the EGR.
- Delete it and hope you never hit a hill at anything other than wide open throttle.
- Get your hands on a JDM ECU.
- Go standalone.

Also, go look at the prices of the VSV's. They're not cheap devices and if the car would be "just fine" without them, Toyota wouldn't have installed them. It's like the whole "NA cams make more power in a turbo!" If that was the case, why on earth would Toyota sink the cost into making a different part for the Turbo model? They're not idiots and they had far FAR more money to sink into R&D.
 
Poodles

Poodles

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MAP ECU doesn't have timing control, it's a piggyback fuel controller and MAP translator. As such, you won't be able to properly tune around the loss of EGR. MAP ECU 2 can be made to to tune timing as well, but you're making a lot more work for yourself.

Why are you removing EGR?
 
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IJ.

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Poodles;1666855 said:
MAP ECU doesn't have timing control, it's a piggyback fuel controller and MAP translator. As such, you won't be able to properly tune around the loss of EGR. MAP ECU 2 can be made to to tune timing as well, but you're making a lot more work for yourself.

Why are you removing EGR?
Click to expand...

Swifty;1666743 said:
Couple things here I'm not sure what they are for. Wondering of I can delete them. Trying to clean the engine bay up a little.
View attachment 48164View attachment 48163View attachment 48165
The sensor on the back of the power steering pump is broken and only has one vacuum line going to it. It's connected to that vacuum assembly that mounts to the bottom of the plenum. I want to remove that entire mess but those other two sensors are also connected to it.
Click to expand...

:nono:
 
radiod

radiod

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Dec 13, 2007
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I can't find the thread this very second, but someone actually compared his EGTs with and without EGR hooked up and it made a difference of 200*F. That's a HUGE difference. EGTs on a forced induction vehicle are high as it is, why would you want to make it that much higher, especially with an aluminum head that WILL anneal if exposed to temperatures that high. Deleting the EGR with the stock ECU handling timing is just asking for trouble down the road. If you want to clean it up or make it look prettier, run some pretty blue silicone lines for your EGR and clean up the one piece that you do see, the rest of it is plumbed through the head and manifolds. The VSV's are mounted underneath your intake manifold and out of sight already.
 
S

Swifty

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Jan 13, 2011
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im simply trying to get rid of parts i dont necessarily need. im not going for hp gains or lighter weight. just trying to make it look less like a mess. plus, i bought this car half taken apart and my jdm engine in my 86 has a couple different sensors and minus some. so to be honest, a couple of the things on this engine are a bit foreign to me. no pun intended. if i cant tune around the egr ill just figure out how to put everything back to how its supposed to go.
 
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Amstaff

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Jun 19, 2010
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I´ve deleted everything in my 2 supras, EGR, VSV and all that other stupid stuff.
No problems so far, both has been driven for 2 years.. Both 300-400hp.
No difference in what so ever..

Also, in my other cars EGR is hooked up to all exhaust ports in the manifold (Like Saab or Ford) and not just 6:th cylinder as in 7mgte, so there´s probably a smaller amount of gas that flows back..
 
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Swifty

New Member
Jan 13, 2011
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Minnesota
yea maybe. i suppose i was just looking for an easier way to put it all back together. i think ill put it back together correctly. i need this engine to run well while i build my jdm setup.
 
gtsfirefighter

gtsfirefighter

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Sep 26, 2006
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Swifty;1666920 said:
im simply trying to get rid of parts i dont necessarily need. im not going for hp gains or lighter weight. just trying to make it look less like a mess. plus, i bought this car half taken apart and my jdm engine in my 86 has a couple different sensors and minus some. so to be honest, a couple of the things on this engine are a bit foreign to me. no pun intended. if i cant tune around the egr ill just figure out how to put everything back to how its supposed to go.
Click to expand...

The stuff you're wanting to get rid of, you can't see anyway from standing in front of the car. The VSV's are tucked so far under the intake about the only way to get to them without eating a bullet is with the engine out of the car. The EGR is tucked nicely away damn near behind the engine as well. The logic here escapes me.
 
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