92GTA

iTrader: (11)

I just bought a 3 wire heated Denso P/N: 234-3094. I also bought the needed pigtail GM P/N 12101923. To keep the stock o2 sensor connector on the engine harness intact, I am going to cut off the connector from the sensor I am replacing and pin that signal wire to the corresponding one on the pigtail. For the ground, I had planned on using the ground harness point on the firewall between the A/C and the distributor. It's nice and clean and easy to get to.

Where to wire up the power wire is my question. I read that someone used the pink wire at the distributor for this. I'd like to as well because it's near my planned ground and seems to make good sense.

My question is that this pink wire goes from the ignition module to the coil and into the harness, I think*. Where should I tap it exactly? Are there any other good positives I should consider tapping into that are around that area?

Also, the Denso has 1 blue wire and 2 black. The blue is on the end and the blacks are the middle and opposite side. What's what?

Thanks!

Alex

92GTA

iTrader: (11)

First off, I decided it would be best to order this weatherpack adapter as it' what I was going to make anyway:
http://tpiparts.net/inc/sdetail/2167
I'll just return the pigtail I bought from GMpartsDirect or use it for something else...

After reading every single post in the search results I could find, I have decided to do what most do and wire it into the fuel pump relay.

This is the pink/black wire going into the fuel pump relay on the firewall. Any tips on how to "splice" it in?

Also I saw people asking how this will affect the voltage to the fuel pump and if WOT fuel supply will be affected but I could not find any answers. Has anyone measured the fuel pump voltage during a WOT run before and after a Ho2 install? If not, I plan to...

Thanks!

Alex

dctrumpet

iTrader: (10)

May i see a pic of the pigtail that you got from gmpartsdirect? If it's what i can use i may take it off your hands. How much?

92GTA

iTrader: (11)

Sure, FedEx says it arrives Thursday. I'll snap a pic and post it in this thread and send you a PM. I paid $33.19 from GMpartsDirect and $32.55 for the one from TPIparts.net

I'd be happy to get $28 including shipping. FYI, according to GM it's the same pigtail used for the TPS sensor and a couple other sensors.

dctrumpet

iTrader: (10)

I'll take it from you and pay what you paid for it. No need for you to loose money. I will use it soon anyway.

Your power wire needs to be connected to a + ignition switched fused 12V source. Just splice into an existing wire and use a weather tight connector/shrink connector and you'll be just fine!

dctrumpet

iTrader: (10)

Hitting the sack. It's 11:15pm here. I will check back tomorrow.

Thanks

dctrumpet

iTrader: (10)

Let me know about the pigtail?

92GTA

iTrader: (11)

Tracking number
364234430715295
Ship date
Sep 26, 2008
Estimated delivery
Oct 2, 2008


Lol. Don't worry, it's yours for sure. I'll open the package to post pictures then I'll just forward it to you in the same package.

dctrumpet

iTrader: (10)

Sounds great!

92GTA

iTrader: (11)

To get back to the topic...

I was hoping that there was a way to get the connector to the fuel pump fuse apart and for me to actually solder the Ho2 wire into it so it's clean and factory looking and a reliable connection.

Anyone done this?

92GTA

iTrader: (11)

Problem, lol. After looking at my fuel pump relay wiring, there is no pink/black wire that I could find only the following:

Fuel pump relay :

Orange
Pink
Grey
Black w/White Stripe
Green w/White Stripe

This is of course the relay that is the passenger side of the 2 on the mount bolted to the firewall right in front of the driver.

I did notice that the drivers side most relay had the following:

Orange
Brown
Green w/White Stripe
Black w/Pink Stripe

But I think that is the fan relay.

There is a 3rd relay on the passenger side of the fuel pump relay but it's not on the same mount and I don't know what it is.

So which of the wires on the fuel pump relay should I wire into???!!!

Thanks!

dctrumpet

iTrader: (10)

I have a 1992 firebird complete diagram if you are interested. It should be the same as yours.

dctrumpet

iTrader: (10)

According to my diagram the orange is the power into the fuse and of course red from the fuse to the battery.

92GTA

iTrader: (11)

Well I have the complete hard bound orange factory/dealer repair manual but I just can't seem to find the details on the fuel pump relay. I know I'm blind but it's kinda frustrating, lol. Nothing in the index under "Relay, Fuel Pump" or "Fuel Pump Relay" or anything like that.

EDIT: Gotcha, so the orange is the hot wire from the relay to the fuel pump?

dctrumpet

iTrader: (10)

you'll need to dive in to the diagram and check it out. There are multiple pages associated with the fuel pump power. It depends on the year and engine, etc.
----------
PM me your email address
----------
what is the year and factory engine for that vehicle

92GTA

iTrader: (11)

1992 F code, it's an LB9

PM sent...

It looks like the grey wire is the hot from the relay to the pump from what I could find in the factory manual, page 8A-22-4

92GTA

iTrader: (11)

What about grey @ E13???

dctrumpet

iTrader: (10)

Not sure about that one. What you need to find is the switched source. I realize you want it in a certain way, but.... LOL. You are way to much like me. I get really particular ("****") and when i get an idea i go nuts until i figure it out.

the other thing you can do it tap into the wire you suspect and test it with ignition off and then test it with ignition on and see if you found the wire/s you want.

92GTA

iTrader: (11)

I guess I'll just grab my test probe then and check them out. I just want to be sure I get the main source of power to the pump that is NOT hot when the pump is not. I'll also be sure that it's hot when the pump is primed but not start the engine and be sure it goes dead after the pump is primed, then back on when I crank the engine. That's the winner

Thanks for the help!

dctrumpet

iTrader: (10)

I hope that diagram helped you out! Keep me posted on here!

92GTA

iTrader: (11)

It did, it's a much different diagram than the one in the factory manual I have.

I sure will!

Alex

the blur

I ran a wire back to the fuse box. and used add a fuse.

92GTA

iTrader: (11)

dctrumpet

Can you send me your email again and I'll forward you the pics of the connector that just arrived...

dctrumpet

iTrader: (10)

PM'd

92GTA

iTrader: (11)

I'm going to install the sensor tonight. I use a test light/probe and some 1/2" wire loom to wrap the wires from the o2 sensor in.

I have the tool to remove the contacts from the GM weatherpack connectors so when I find the wire I'm going to use for positive, I'll pop it out of the relay connector, solder the o2 wire into it, and snap it back into the connector that plugs into the relay.

dctrumpet

iTrader: (10)

Cool. Good luck!

92GTA

iTrader: (11)

Ok, here are some details...

The orange wire is constant hot no matter what. The grey is in fact the one I wanted. The grey became hot when I turned the key on and the pump primed, then went dead when the pump shut off after priming with the key still on, then goes back on when the engine is started.

I took some pictures so I'll post some pictures and details/comments when I get cleaned up and relax a bit.

92GTA

iTrader: (11)

Here are pictures of the install..

dctrumpet

iTrader: (10)

Great job! Let me know how she runs!

92GTA

iTrader: (11)

I HAD written a whole bunch of detailed notes between the pictures but the bloody ****-poor web server kept timing out so it lost it all. No way I'm typing it all again. The pictures can just be self explanitory. Damn I was pissed and had to walk away, ****in timeouts.

I'll let you know tonight when I retune with my notebook! I can't wait to find out either!

dctrumpet

iTrader: (10)

Going to bank and post office right after i type this. Sending it out Priority Mail for the harness.

The_Phoenix

iTrader: (3)

Great thread 92GTA! I'll be doing the same clean installation on my '89 GTA since its needing a new o2 sensor. Judging by the pictures, its going to be easy to install.

Thanks,
Phoenix

92GTA

iTrader: (11)

Install did go easy, you can see in one of the pics where I put the ground. I wish it hadn't lost all of my notes.

I can honestly say that this engine has NEVER runner betterin it's life let alone in the last 9 years I've owned her! It's amazing! I did of course re-tune it after.

The_Phoenix

iTrader: (3)

Found it. Its its second to the last pic which shows you grounded it in between the firewall and the f/p, MAF, fan relay bracket correct? (hope me eyes aren't decievig me ) . I'm experiencing popping through the exhaust while in park as well as drivability is a little on the poor side. I'm more than sure it needs a new o2 sensor so while I'm at it I might as well upgrade. Can't wait to see how she runs when I get that thing installed. I'll let you know.

Later,
Phoenix

92GTA

iTrader: (11)

You got it! Best of luck!

cronsformula350

I am putting a heated 3 wire o2 sensor in now, it is a bosch, but I didn't right down the part number. It has two white wires with no stripes or differences, theres no writing either. I asked one of my automotive instructors, and he said that the black is the ground, and the two white wires are the power and signal wires.

So I tried it that way, I tried to measure the output voltage of the two white wires, but they were both fluctuating about the same numbers. So I simply let the car warm up for about 18 minutes, and drove for a couple of minutes, the service engine soon light, comes on with the code for the o2 failing. I know this, because there was a bad ground wire on the passenger cylinder head. So I fixed that and the 1 wire o2 was working ok, but I know it could be better.

So I figured the two white wires, the one that set the light was the power, and the other was the signal. So I simply connected the other wire and no more engine light coming on.

But I'm starting to wonder after what someone else stated in this post. If the black wire is going to a ground, the white wire may be acting as the sensor wire, so basically like a ground, but the signal instead. And if the heated wire, the other white one is to be connected to ground, its going to back feed through the ground black wire and change the values.

What do you think guys?

dctrumpet

iTrader: (10)

Black wire is body ground.

White wire goes to a switched/"ignition on" source and the other white wire goes to your factory purple wire.

dctrumpet

iTrader: (10)

It could also be that it's a Bosch O2 sensor. Known for issues and failures.

Sparkytfl

What I read was the different-colored wire is signal, and the other two are power, and it doesn't matter which of those two are pos/neg. This was just about a month ago when I installed the bosch one and it works just fine.

cronsformula350

I installed mine today, I ran the black wire to the stock 02 sensor pickup signal wire, and ran one white wire to ground, and the other to the fuel pump relay, the car went into closed loop within two minutes, so now I just have to see what the mileage is going to be like, I'm shooting for about 19mpg.

I got 13.5 with a messed up wire for the stock, 1 wire 02 sensor, I fixed it, and it went to about 16, but I got 22-25 in my iroc-z at
www.cardomain.com/ride/471099/8 check it out.

I am hoping for 19 mpg now, but the install was easy. There is some discrepency in the wiring, some guys say the wrong things about it, This way seems to work fine, and the way its supposed to, so yeah.