Oygen sensor removal, passenger side - ZR-1 Net Registry Forums

Reichert · 03-03-2018

Any tips on disconnecting the passenger side O2 sensor on a 1990? It's jammed way up in there and I don't see an obvious way to get to it.

I just got the car and haven't picked up the service manuals yet - still deciding between print and online.

Young1 · 03-03-2018

I did it recently. Remove the angle frame brace. It looks like it holds up the motor but it doesn't. The connecter is then accessible. Not at all difficult.

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Reichert · 03-03-2018

Quote:

Originally Posted by Young1

I did it recently. Remove the angle frame brace. It looks like it holds up the motor but it doesn't. The connecter is then accessible. Not at all difficult.

Sent from my iPhone using ZR-1 Net Registry

took a peak under the car again and yeah, that makes sense - i'll give it a try and report when I can and report back. Thanks!

Young1 · 03-03-2018

Be sure to install a Denso or a Bosch. The cheapies don't work.

XfireZ51 · 03-03-2018

Quote:

Originally Posted by Young1

Be sure to install a Denso or a Bosch. The cheapies don't work.

Suggest AC/Delco from Rock Auto

instead.

Reichert · 03-03-2018

Quote:

Originally Posted by XfireZ51

Suggest AC/Delco from Rock Auto

instead.

I had already purchased the Bosch sensors (13077). Well ... I bought them on Amazon (3rd party vendor), and I received 2 Bosch branded boxes - only one of them had the correct part in it. *sigh*

Young1 · 03-03-2018

I bought a pair of Bosch on Rock Auto. Good pricing you just have to wait

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Paul Workman · 03-04-2018

I concur with Dominic. The Bosch (in particular) would become intermittent at times - causing me "a little" angst!

But, the REAL angst was accessing the sensors to remove and reinstall them!

The "fix' was plugging the top mount bungs and installing new ones facing laterally toward the frame rails. What a good idea that turned out to be! (I placed them at about 80-85º from vertical to my SW header collectors. I've NO problems with them being damaged when bottoming out (i.e., speed bumps, etc), and heaven knows I've tested them!!)

O2 (weld in) Bungs: Summit Racing: #SLE 30115

Reichert · 03-04-2018

Quote:

Originally Posted by Paul Workman

I concur with Dominic. The Bosch (in particular) would become intermittent at times - causing me "a little" angst!

But, the REAL angst was accessing the sensors to remove and reinstall them!

The "fix' was plugging the top mount bungs and installing new ones facing laterally toward the frame rails. What a good idea that turned out to be! (I placed them at about 80-85º from vertical to my SW header collectors. I've NO problems with them bottoming out, and heaven knows I've tested them!!)

O2 (weld in) Bungs: Summit Racing: #SLE 30115

I really didn't have an issue accessing the sensors, using a slotted 3/8ths offset wrench.

Per XfireZ51 and your advice, I went ahead and ordered the delco sensors from rock auto, since I only had one useful bosch sensor from my amazon order.

-Stephen

Z51JEFF · 03-07-2018

Plugging the thing in is a real challenge. What I did was put a wad of dumdum on the end of a long thin screwdriver and started the plug into the other end and then used another long screwdriver to push the plug together. Dumdum is seam sealer.

03-03-2018	#1
Reichert Join Date: Feb 2018 Location: Austin, TX Posts: 104	Oygen sensor removal, passenger side Any tips on disconnecting the passenger side O2 sensor on a 1990? It's jammed way up in there and I don't see an obvious way to get to it. I just got the car and haven't picked up the service manuals yet - still deciding between print and online.

03-03-2018	#2
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 899	Re: Oygen sensor removal, passenger side I did it recently. Remove the angle frame brace. It looks like it holds up the motor but it doesn't. The connecter is then accessible. Not at all difficult. Sent from my iPhone using ZR-1 Net Registry __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

03-03-2018	#4
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 899	Re: Oygen sensor removal, passenger side Be sure to install a Denso or a Bosch. The cheapies don't work.

03-03-2018	#7
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 899	Re: Oygen sensor removal, passenger side I bought a pair of Bosch on Rock Auto. Good pricing you just have to wait Sent from my iPhone using ZR-1 Net Registry __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

03-04-2018	#8
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Re: Oygen sensor removal, passenger side I concur with Dominic. The Bosch (in particular) would become intermittent at times - causing me "a little" angst! But, the REAL angst was accessing the sensors to remove and reinstall them! The "fix' was plugging the top mount bungs and installing new ones facing laterally toward the frame rails. What a good idea that turned out to be! (I placed them at about 80-85º from vertical to my SW header collectors. I've NO problems with them being damaged when bottoming out (i.e., speed bumps, etc), and heaven knows I've tested them!!) O2 (weld in) Bungs: Summit Racing: #SLE 30115 __________________ Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry Last edited by Paul Workman; 03-05-2018 at 08:41 AM.

03-07-2018	#10
Z51JEFF Join Date: Dec 2007 Location: Fremont,Ca Posts: 3,079	Re: Oygen sensor removal, passenger side Plugging the thing in is a real challenge. What I did was put a wad of dumdum on the end of a long thin screwdriver and started the plug into the other end and then used another long screwdriver to push the plug together. Dumdum is seam sealer.