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sim303 Newbie
Joined: 04 Aug 2016 Posts: 7 Location: London
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Posted: Sat Oct 14, 2023 18:31 Post subject: Injection pump TCV (Timing Control Valve) removal |
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Hi all
I hope someone can help (actual question in bold below!)
I'm about one month into chasing a DTC 14 fault ("Timing Control System Malfunction").... a long story... Along the way, as per the FSM, I have replaced the fuel filter, drained and checked the fuel tank for mould / gunk (none), checked the pertinent ECU signals on a 'scope, checked the various resistances / voltages. I've removed a large mug of disgusting sludge from the intake pipe, manifold, swirl flaps & inlet ports. I've also had the injectors refurbed as they were knackered and leaking, and done the valve gaps whilst I was in there.
This has helped a lot with the exhaust, but I still get DTC 14 and there is a knock at idle. The last port of call according to the FSM is the injection pump ( "Replace" ).
My thinking is to try replacing just the TCV first.
This afternoon I made good progress and got the two allen bolts out such that I can rotate the TCV in situ. However it does seem to want to withdraw.
I didn't pull too hard as the last thing I want to do is damage something inside the pump!
The question is - does it just pull out? Or is there some mechanism inside that is holding it in place? (I notice there is a bulbous cover place located nearby - I am worried that this hide some sort of physical linkage that needs removing first)
TIA
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Posted: Sat Oct 14, 2023 18:31 Post subject: Google Ads keep this community free to join! |
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sim303 Newbie
Joined: 04 Aug 2016 Posts: 7 Location: London
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Posted: Sat Oct 14, 2023 18:35 Post subject: |
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I should have said..: 4.2 diesel (1HD-FTE) - June 2002 build |
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andy Moderator

Joined: 16 Dec 2003 Posts: 2243 Location: Polegate, Sussex, England.
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Posted: Sun Oct 15, 2023 10:10 Post subject: |
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Long time ago that I did this, so best you read this TCV _________________ It's Not a Bl**dy Jeep it's a Landcruiser
150 series Invincible X
100 Series VX Limited
Mercedes Sprinter 311 Luton
1993 VX80 4.2td SOLD
1996 Hilux Surf SSR-G Intercooler Sold
1994 Hilux Surf SSR-V Sold |
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sim303 Newbie
Joined: 04 Aug 2016 Posts: 7 Location: London
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Posted: Sun Oct 15, 2023 10:23 Post subject: |
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Thanks! Sounds like it should just pull out now - I'll go down and try that today whilst the sun is out.
Interesting thread that.... The funny thing is I have occasionally seen drips coming down on to the passenger footwell carpet. I assumed they were water condensate or something and haven't investigated further yet. Now you've got me worried (even though I've not noticed and diesel smell in the cab)
Thanks _________________ Land Cruiser Amazon (100) VX 4.2TD ATM
HDJ100R-GNPEZW Build: 01/05/2002 |
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andy Moderator

Joined: 16 Dec 2003 Posts: 2243 Location: Polegate, Sussex, England.
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Posted: Sun Oct 15, 2023 14:11 Post subject: |
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Yes I think it just pulls out, but is a bit tight because of the rubber ring, and I never noticed any diesel smell, it was like it for some time before I found out what the problem was, thought it was water. _________________ It's Not a Bl**dy Jeep it's a Landcruiser
150 series Invincible X
100 Series VX Limited
Mercedes Sprinter 311 Luton
1993 VX80 4.2td SOLD
1996 Hilux Surf SSR-G Intercooler Sold
1994 Hilux Surf SSR-V Sold |
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sim303 Newbie
Joined: 04 Aug 2016 Posts: 7 Location: London
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Posted: Mon Oct 16, 2023 11:57 Post subject: |
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Thanks - yes it came out ok in the end. Time to look for a new one I guess... _________________ Land Cruiser Amazon (100) VX 4.2TD ATM
HDJ100R-GNPEZW Build: 01/05/2002 |
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