Early V6 oil pressure sender to 1988 style conversion (Page 1/3)
Skybax JUN 07, 07:15 PM
I'm converting my 1986 oil pressure sender to the later 1988 style, and I'm reading conflicting info when it comes to wiring up the new style connector...

They are both 3 wire, and some posts in the archives say the middle wire is the ground, while the other two are interchangeable.

So I'm looking for clarity on this...

1. When they say the center wire is ground, I assume they are talking about the 1986 connector with tan wire?
2. When I look at the NEW 1988 sender socket pins, the pin on the LEFT is marked "G", doesn't that indicate ground?

I've read people doing conversion and new 1988 style doesn't last long, shorting out, or fuel pump continues to run after ignition off...

Would like to get some feedback on this from somebody who has been there is knows for sure, thanks.



[This message has been edited by Skybax (edited 06-07-2021).]

Skybax JUN 07, 07:30 PM
Got the wire info from Orge's site...



...just curious what the "G" means on the inside on the new socket.

[This message has been edited by Skybax (edited 06-07-2021).]

ArthurPeale JUN 08, 02:26 PM
I'll be following this with interest - what are the benefits of this exchange?
Dennis LaGrua JUN 08, 06:59 PM

quote
Originally posted by ArthurPeale:

I'll be following this with interest - what are the benefits of this exchange?



The benefits are replacing an early low reliability unit.a later high reliability sensor.
------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

[This message has been edited by Dennis LaGrua (edited 06-09-2021).]

Spadesluck JUN 09, 02:09 AM
I converted my 87 to an 88 style more than 2 years ago. Still works. I went a step further and mounted my sender right off the block using an adapter and 45 degree elbow. I also used Ogres site for the wiring.
Raydar JUN 09, 09:34 AM
http://www.gafiero.org/bbs/index.php?topic=1642.0
Raydar JUN 09, 09:41 AM

quote
Originally posted by Skybax:

I've read people doing conversion and new 1988 style doesn't last long, shorting out, or fuel pump continues to run after ignition off...

Would like to get some feedback on this from somebody who has been there is knows for sure, thanks.




There was a run of mis-wired 88-style oil pressure switches a few (more than ten) years back. I would suspect that they have all worked their way through the system, by now.
(There was no question. Plugging them in usually caused the fuse to blow, IIRC.)

About 5 years ago, I also installed one that seemed to stick, and kept the fuel pump turned on, even with the key/engine off.
I got tired of such silliness, and switched my fuel pump to a switched circuit. Some people would say that this is ill-advised, but it has caused me exactly zero issues. But then I'm not running a high capacity pump, either.

[This message has been edited by Raydar (edited 06-09-2021).]

fierofool JUN 09, 10:16 AM
I haven't had any problem with the conversion on my 86 that was done 7 years ago in the link Raydar posted. (Thanks, Steve) That can't be said of my 87 which I converted maybe 2 years ago.

The first unit began blowing my instrument panel fuse so that no gauges other than the speedometer would work. I returned it for a replacement and that one worked for a while then began doing the same. So, I just unplugged it and left the oil pressure gauge pegged full right bottom.

I had a used one (don't remember where I got it) and eventually installed it. It worked for a while, then the fuel pump wouldn't shut off and it blows the gauge fuse. So again, the sending unit is unplugged and the gauge is pegged far right bottom. I've verified that it's wired correctly, so that isn't the problem.

I don't remember what brands I had, but I got all of them from Rock Auto, except the used one. If you do the conversion, get a good name-brand sending unit.
Dsanchez214 JUN 09, 11:01 AM
Following this. Will be doing this conversion this weekend. I am also planning on moving it and using the 45 Degree elbow.
Blacktree JUN 09, 11:47 AM
I switched to the '88 style oil pressure sender, because the early type would only last 6-12 months before they started leaking oil. That got pretty annoying. I was able to get the pigtail from an '88 Fiero wiring harness. The wire colors were the same. So I just connected the same color wires together.