engine rev issue in Nissan Navara

Submitted: Sunday, Sep 21, 2014 at 13:20
ThreadID: 109568 Views:2634 Replies:6 FollowUps:5
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rebuilt engine due to cracked head, new pistons etc, put all back together starts and runs, sluggish to rev and won't rev beyond 3000 revs, all timing checked and rehecked ok checked and cleared fault codes none returning. Any thoughts ?
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Reply By: Neil & Pauline - Sunday, Sep 21, 2014 at 15:04

Sunday, Sep 21, 2014 at 15:04
Have you checked fuel filter is not blocked?

Neil
AnswerID: 539350

Follow Up By: Danny R4 - Monday, Sep 22, 2014 at 07:19

Monday, Sep 22, 2014 at 07:19
Thanks Neil,
Its a new fuel filter, new air filter too
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FollowupID: 823990

Reply By: Doc - Sunday, Sep 21, 2014 at 19:57

Sunday, Sep 21, 2014 at 19:57
Petrol or diesel?

Unplugged sensor - AFM perhaps?

By "all timing checked" do you mean you've checked both the ignition timing (if it's petrol) and cam timing?

Does it start easily & idle well, and rev smoothly to 3000, or is it missing and farting?
AnswerID: 539367

Follow Up By: Danny R4 - Monday, Sep 22, 2014 at 07:23

Monday, Sep 22, 2014 at 07:23
Hi Doc,
its a diesel
gears all checked letters line up
timing chain all lines up with blue and yellow link that lines up wit injector pump and cam shaft
starts easily idles well , slow to rev to 3000 doesnt miss and wont go over 3000 revs,
Thanks Danny
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FollowupID: 823991

Follow Up By: Doc - Monday, Sep 22, 2014 at 08:03

Monday, Sep 22, 2014 at 08:03
Can't offer much help on a diesel, sorry. Good luck with it though.
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FollowupID: 823995

Reply By: Shaker - Monday, Sep 22, 2014 at 08:18

Monday, Sep 22, 2014 at 08:18
Which engine is it?

AnswerID: 539386

Follow Up By: Danny R4 - Monday, Sep 22, 2014 at 15:20

Monday, Sep 22, 2014 at 15:20
3.0L diesel D22 model
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FollowupID: 824016

Reply By: bluefella - Monday, Sep 22, 2014 at 17:08

Monday, Sep 22, 2014 at 17:08
could it be that a rag may have been left in the intake to stop dirt getting in while doing repairs? easy done, it has happened before.
AnswerID: 539399

Follow Up By: Member - Rosss - Monday, Sep 22, 2014 at 21:53

Monday, Sep 22, 2014 at 21:53
I've seen valves bent on a chev V8 because somebody forgot to get the rag out of the intake that was put there to stop dust and foreign objects while the carby was off.
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FollowupID: 824036

Reply By: kiwicol - Monday, Sep 22, 2014 at 20:35

Monday, Sep 22, 2014 at 20:35
Hi Danny, Did you have the pump done at the same time.If not you will find the pump may be worn to the degree of the pre reco. If you haven't it is wise to reco the radiator as well as if you don't it can affect your warranty on the rebuild.

Cheers Col
AnswerID: 539411

Reply By: Ron N - Monday, Sep 22, 2014 at 22:25

Monday, Sep 22, 2014 at 22:25
If no fault codes are returning, it's generally a simple mechanical problem such as fuel starvation or air getting in the fuel.

Disconnect the fuel line at the pump and connect a length of fuel hose from a clean 20L drum with clean diesel in it.
Take it for a run, see if this solves the problem.
If it does, you have a problem with the fuel primer pump leaking air or a blockage in the fuel line between tank and pump.
AnswerID: 539416

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