GRX 4.5 electrical question

Post Reply
User avatar
nisjeep
Senior Member
Senior Member
Posts: 64
Joined: 25 May 2017 16:15
Full Name: Peter Church
Nickname: Nisjeep
Home Town: Vredenburg
Current 4x4: 2002 Patrol 4.5
2001 Terrano 2
Home Language: Afrikaans
Has thanked: 5 times
Been thanked: 12 times

GRX 4.5 electrical question

Post by nisjeep »

I am having a hard time with a slight misfire on my TB45 motor. It starts very rough and I have a cylinder down up to 4000 rpm and then it kicks in. I have replaced plugs, cleaned electrical connectors, cleaned the MAF. I am suspecting the tps as the gear changes are erratic sometimes. I have a blue plug connector on the engine that goes nowhere... Does anybody know where it goes? Thanks
Attachments
20171010_075124.jpg
20171010_075124.jpg (5.46 MiB) Viewed 2647 times
20171010_075118.jpg
20171010_075118.jpg (5.09 MiB) Viewed 2647 times

User avatar
David M
Patrolman
Patrolman
Posts: 893
Joined: 12 Nov 2013 15:13
Full Name: David Marais
Nickname: David Marais
Home Town: Midrand
Current 4x4: 1998 4.5 GL Patrol
2006 4.2 Td Bakkie (SWAMBO's) - The "Firetruck"
Home Language: English
Location: Midrand
Has thanked: 20 times
Been thanked: 102 times

Re: GRX 4.5 electrical question

Post by David M »

I will check that plug this evening on mine.

A likely cause however is your HT leads.

Put your vehicle in a very dark place this evening, open the bonnet and start the vehicle. Climb on a chair or something (very important as you are unlikely to see anything from normal level) and look at the leads and see if you can see any electricity running around the cord/s. If so your HT leads are kaput.
There are still places out there!!!! - Daniel Goz - The "Tapam" movie

User avatar
Kagiso II
Patrolman 1000+
Patrolman 1000+
Posts: 3820
Joined: 10 Jun 2009 16:58
Full Name: Mac Mc Menamin
Nickname: Oom Mac [Uncle Mac] [Uncle] [Oompie] Kagiso
Home Town: BrentwoodPark, Benoni
Current 4x4: 1982 Datsun Safari 2,8 aka LOBO; [1,300,000 Km verby !]
'99 PATROL 4,2 diesel.
2012 Jimny [SWAMBO se Kantoor-toe]
Home Language: AFRIKAANS
Location: Benoni and wherever the Outreach takes me.
Has thanked: 315 times
Been thanked: 152 times
Contact:

Re: GRX 4.5 electrical question

Post by Kagiso II »

Sticky valve -- chase ATF in the tank when it is about 1/4 ... replace engine oil with cheapest DIESEL OIL you can find
Drive that tank tiol emty. Pump clean feul over from SUB tank.. At home change the diesel oil back to your regular oil
[Advice I got in Botswana in August on that trip for James who gave me very sick Patrol to travel with.
AND IT WORKED .. [4.5 Patrol with close to 400,000 km on]
Don't bring God down to your level of faith ... bring your faith up to His level!

User avatar
Peter Connan
Moderator
Posts: 6397
Joined: 10 Sep 2010 07:21
Full Name: Peter Connan
Nickname: Piet
Home Town: Kempton Park
Current 4x4: 1996 Patrol 4.5SGL
Home Language: Afrikaans
Location: Kempton Park
Has thanked: 764 times
Been thanked: 707 times

Re: GRX 4.5 electrical question

Post by Peter Connan »

Kagiso II wrote:Sticky valve -- chase ATF in the tank when it is about 1/4 ... replace engine oil with cheapest DIESEL OIL you can find
Drive that tank tiol emty. Pump clean feul over from SUB tank.. At home change the diesel oil back to your regular oil
[Advice I got in Botswana in August on that trip for James who gave me very sick Patrol to travel with.
AND IT WORKED .. [4.5 Patrol with close to 400,000 km on]
I would definitely do a compression test before trying something as drastic as this...
Mag ons ons kenniskry met lekkerkry aanhoukry.

IanT
Patrolman 1000+
Patrolman 1000+
Posts: 1385
Joined: 17 May 2013 10:43
Full Name: Ian Temperley
Nickname: IanT (aka) "The Joker"
Home Town: JHB
Current 4x4: 1995 GQ 4.2 Petrol (Turbo Charged) (Hell Boy)
2008 4.8 GRX Umkombe
Home Language: English
Been thanked: 90 times

Re: GRX 4.5 electrical question

Post by IanT »

May be wrong but I think all the 4.5's have that electrical connector going nowhere! :think:

User avatar
Bre
Senior Member
Senior Member
Posts: 262
Joined: 08 Mar 2017 11:27
Full Name: Brent Harris
Nickname: Bre
Home Town: Bellville
Current 4x4: 1999 Nissan Patrol 4.5 GRX
2000 Nissan Terrano II 2.7 TDi Sport
2003 Nissan Hardbody 3.3 SEL DC 4x4
Home Language: English
Has thanked: 52 times
Been thanked: 33 times

Re: GRX 4.5 electrical question

Post by Bre »

I can find no such plug on my '99 GRX :think:

User avatar
David M
Patrolman
Patrolman
Posts: 893
Joined: 12 Nov 2013 15:13
Full Name: David Marais
Nickname: David Marais
Home Town: Midrand
Current 4x4: 1998 4.5 GL Patrol
2006 4.2 Td Bakkie (SWAMBO's) - The "Firetruck"
Home Language: English
Location: Midrand
Has thanked: 20 times
Been thanked: 102 times

Re: GRX 4.5 electrical question

Post by David M »

My '98 GL also does not have that plug....
There are still places out there!!!! - Daniel Goz - The "Tapam" movie

User avatar
nisjeep
Senior Member
Senior Member
Posts: 64
Joined: 25 May 2017 16:15
Full Name: Peter Church
Nickname: Nisjeep
Home Town: Vredenburg
Current 4x4: 2002 Patrol 4.5
2001 Terrano 2
Home Language: Afrikaans
Has thanked: 5 times
Been thanked: 12 times

Re: GRX 4.5 electrical question

Post by nisjeep »

Okay, quick update. Problem is fixed. The one wire on no6 injector was nipped. I have no idea how but she pulls like a train now. I have 500ml of synthetic 2SO in the tank to loosen up any potential sticky bits.
Popped into the dunes this afternoon and what a pleasure !
Thanks to all.

User avatar
iandvl
Patrolman 1000+
Patrolman 1000+
Posts: 1719
Joined: 12 Jan 2015 13:26
Full Name: Ian de Villiers
Nickname: Ian
Home Town: Garsfontein
Current 4x4: Nissan Patrol 4.5 GRX
Home Language: English
Has thanked: 257 times
Been thanked: 437 times

Re: GRX 4.5 electrical question

Post by iandvl »

nisjeep wrote:Okay, quick update. Problem is fixed. The one wire on no6 injector was nipped. I have no idea how but she pulls like a train now. I have 500ml of synthetic 2SO in the tank to loosen up any potential sticky bits.
Popped into the dunes this afternoon and what a pleasure !
Thanks to all.
Thanks for the feedback. Glad it is sorted. :salute: :salute:

Post Reply

Return to “13. Electrical & Electronics”

Who is online

Users browsing this forum: No registered users and 1 guest