boostedka's Turbo 3RZ Tacoma

@Bhz2rz
Those are the throttle body coolant lines. You can do one of two things with them...1. You can delete both of them and cap off the hard line behind the intake manifold where they originate or 2. You can just replace the one that runs through the EGR valve so that I goes directly from the throttle body to that hard line and leave the other line in place as well. This will allow the coolant to still pass through the throttle body. I've done this both ways. The first way will make the truck idle a little odd for a while until the ECU adjusts to no coolant going through the TB. With the 2nd way, the truck will idle completely normal right away on the first start up.

Let me know if you have any other questions

 

Do you have any pictures that can guide me? I just wanna be sure where exactly to put them. I want to do it the second way so I don't have any Idling problems. BTW Thank you so much for your help man.

 

Here's a pic of when I capped them off on this black truck on the hard line I mentioned. This will at least give you an idea of where these lines connect to at the back of the engine bay. You can do this without removing the manifold like I did, there's just a lot less room to do so.
If you want to still have coolant going through the TB, you can leave on the line that runs straight to this from the TB (I don't remember if it's the upper or lower one). Then just get a new line from a local parts store to also run directly from the TB to the hardline to replace the two piece line that runs through the EGR valve. I don't have any pictures of that from my reg cab truck I did that to.

 

If I was to do this on another 2/3rz motor, I would leave coolant going through the TB. Seemed like the truck just ran better that way and I'd worry long term about one of those caps cracking or something causing a huge coolant leak.

 

Yes it sounds that it's be best idea. I really appreciate your help. I will try to do it the same way

 

No problem. LMK if you any other questions.

 

Hey man, I got it done but I don't know what to do with the two little hoses now and I have 3 inlets what am I supposed to do there?

 

Can you post a picture of what you're referring to?

 

Hey, Boostedka you run that taco with the egr delete sense 2017 and have had no check engine codes for the egr because you connected a resistor in line?

 

Yeah man, no issues at all. I did it to another 3rz that was a '99 with 200k+ miles and had the same positive result.

 

yeah I keep getting a lean code p0171 and I replaced all the o2 sensors cleaned MAF and all new exhaust from cat back including cats so I was thinking on replacing the intake manifold gaskets and deleting the egr and add headers I have a 2003 tacoma v6 with 150k miles on it. Do you think that is a good step to take?

 

First thing I would do is pull the intake manifold off and clean out all the carbon build up inside of it. You'd be surprised how much is in there. Try to get the intake ports on the head as clean as possible as well. The easiest and most effective way I've figured out to clean those manifolds is to spray some oven cleaner inside of it, let it soak, then spray it out with a pressure washer. Then, if you can while the manifold is off, either get your injectors cleaned or buy a new set. You can usually find the pink tops on ebay for around $100. Many times tacomas run lean because all the carbon build up plugs the injectors and intake ports.

Also, one other problem could be your valve clearance. 3rz's are supposed to have this checked and adjusted every 80-100k miles. This makes a decent difference in how the truck runs and also can cause certain CELs to pop up if left out of spec.

 

I can confirm that you know what you are talking about. I pulled my intake at around 300K to reveal that there was a TON of buildup in the intake runners.... I likely had close to 50% blockage. I also replaced the OEM injectors with Ebay pink tops and my truck has been great and I'm at 346K miles.

 

I remember that now! I'm happy to hear it's still running well for you.

 

Posting this for the OP. Pics worth a thousand words. I believe my truck runs like it did when it was new after cleaning out the intake runners and replacing the injectors.

This was on my 3rz at around 296K.
Here's the intake/exhaust for #3 and #4.


The worst was #4.


Here's #1 and 2 after cleaning


Here's #3 and 4 after cleaning


Here's the thread if you want to read through it.
https://www.tacomaworld.com/threads/chasing-the-2200-rpm-ping-2-7.494905/

 

Holy shnikies! That was some serious carbon build-up! Gotta be some kind of record.

Just out of curiosity, have you ever messed with the valve clearance on your heads?

 

Checking the valve lash at around 290K. It wasn't out all that much. Here is the link where I addressed this. Being a machinist, I was able to alter the existing shims on a surface grinder. Anyone could do the same if they carefully labeled each shim like I did and have them ground to a specific dimension by a local shop. I'd be willing to help if needed for a nominal fee.
https://www.tacomaworld.com/threads/valve-lash-results-290k-miles.495565/

 

I edited post #495 to show before and after pics of carbon build up in ports.

 

@boostedka

Just finished reading this thread from beginning to end.

I'm planning on creating a similar setup on a stock ECU to what you ran on your turbo 3rz.

Quick couple questions for you.

I assume I need a bigger fuel pump to hit around the same numbers as you ran? Do you think a Walbro 250 would work?

Will I be able to run a stock ECU with the 440cc injectors you recommended earlier? Looks like these might be the right ones?

https://www.ebay.com/itm/204326732137

Is there a big incentive to use these injectors over the stock ones I have with a stock ECU? I have a 2002 4wd Tacoma with the 3rz, and from what I understand, it should have the pink-top injectors from the factory.

I can't imagine my injectors are all that bad, considering my truck is sitting at only 110k miles.

Thanks for the response,

David

 

I would personally stick with the stock injectors if not going standalone ECU or any sort of way to electronically mitigate fuel trims.

If you thought this was a decently long and informative read, check this thread as well: https://www.tacomaworld.com/threads/turbo-bs-thread.481844/