Nissan GU 4.2TD Rough starting

Submitted: Friday, May 07, 2004 at 10:33
ThreadID: 12670 Views:2697 Replies:10 FollowUps:3
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Starting the Nissan when it`s cold is interesting it feels rough not firing on all 6cyl,it`s ok after about 30 seconds and runs like a dream when it`s warm but cold it`s not good any advice would be helpfull.The Nissan has only done 60k.
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Reply By: Member - Roachie (SA) - Friday, May 07, 2004 at 11:18

Friday, May 07, 2004 at 11:18
G'day pitboss,

The only suggestion I could make is to get the fuel injectors and pump checked and re-set. I had my 4.2TD done by a crowd in the southern highlands, south of Sydney that we aren't allowed to name, when it only had about 20,000klm on the clock. They (as well as other mechanics) all seem to agree that the factories just grab 6 injectors and a pump off the shelf and bolt them on/in.....they don't set them up for optimum performance. Mine ran heaps better after that tune up, but I don't recall it ever farting etc on a cold morning.

Other thing to check/change might be your fuel filter.
AnswerID: 57600

Reply By: Davoe - Friday, May 07, 2004 at 12:09

Friday, May 07, 2004 at 12:09
The edic motor on my 2h goes into overfuel position when starting which I assume is a bit like a choke. Whatever provides this function on your nissan could be bung
AnswerID: 57603

Reply By: sensei - Friday, May 07, 2004 at 12:17

Friday, May 07, 2004 at 12:17
Sounds more like your glow plugs are not working correctly to me, the old girl runs well after 30sec says the engine is fine. The fuel filter is a good one to change as above and can give you some werid problems when blocked, normally lack of power, black smoke and loads of others. The list is long.
If they are OK then follow through with checks on your injectors/fuel pump etc but not before.
AnswerID: 57604

Reply By: Patrol22 (Queanbeyan - Friday, May 07, 2004 at 13:01

Friday, May 07, 2004 at 13:01
I agree with Sensei - it seems that the glow plugs are falling just short of the mark and this might be related to a weak(ening) battery rather than the glow plugs per se. Borrow your mates cranking battery and test it out over the weekend - I find it much better if I wait 5 seconds after the glow plug indicator goes out before cranking the engine over - fires up straight away.
Cheers
Pete
AnswerID: 57607

Follow Up By: Member - Roachie (SA) - Friday, May 07, 2004 at 15:20

Friday, May 07, 2004 at 15:20
Pete,
I agree.
With the radio off you can actually hear the click of the glow plugs (I'm guessing) switching off about 5 seconds after the dash light goes off......that's when I hit the starter on my GU; not before.
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FollowupID: 319403

Reply By: johnsie - Friday, May 07, 2004 at 13:45

Friday, May 07, 2004 at 13:45
If its still under warranty make nissan aware of the problem.My 2000 wagon had the same type of problem then took longer to fire and after a lot of dramas refused to play.checked glow plugs ,sender in the key ,immobilizer,nearly got to the stage of a new pump at their cost but the problem ended up being the fuel cutoff soliniod (spelling) which is relativly cheap and is behind the pump against the block so the pump has to come off. Let me stress this is a isolated problem I was just unlucky to have 2 go on me and my service manager was on the ball.
AnswerID: 57610

Reply By: Member - Pesty (SA) - Friday, May 07, 2004 at 13:48

Friday, May 07, 2004 at 13:48
Sounds more like deisel wax in injectors to me , check to make sure you are getting winter deisel if in a cold climate. Also agree with Roachie ( now theres a first) have your injectors serviced by a specialist most are not setup properly.
AnswerID: 57611

Follow Up By: Member - Roachie (SA) - Friday, May 07, 2004 at 15:24

Friday, May 07, 2004 at 15:24
Geeees Pesty,
That is a first......now that I've got you agreeing with me, when are you putting in your order for a GQ (I admit they are a stronger truck than the GU......there ya go; that's my big admission for the day!!!LOL)
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FollowupID: 319405

Follow Up By: Member - Pesty (SA) - Friday, May 07, 2004 at 16:47

Friday, May 07, 2004 at 16:47
Dont push your luck, Theres nothing wrong with my eyesight and Im not senile yet so I can still tell the difference. LOL
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FollowupID: 319413

Reply By: basecamp15 - Friday, May 07, 2004 at 14:51

Friday, May 07, 2004 at 14:51
When it's running rough have you revved it hard and noticed any blue smoke coming out the exhaust?
regards Mark.
AnswerID: 57624

Reply By: Eric Experience. - Friday, May 07, 2004 at 21:54

Friday, May 07, 2004 at 21:54
Pitboss.
The problem is almost sure to be a loose connection on a glow plug. you can find out which one by connecting a test lamp to the stud [not the wire] of each plug in turn and get someone to turn on the glow plugs for one second for each cylinder, the one where the light does not glow is the culprit. your pump and injectors are fine. Eric.
AnswerID: 57682

Reply By: Flash - Saturday, May 08, 2004 at 09:31

Saturday, May 08, 2004 at 09:31
Good advice but try this before you even open the bonnet!!
When it's cold, do not start the engine when the light goes out. Wait another five seconds or so (The glow plugs stay on a while AFTER the light goes out)
Works for me on a number of diesels I regularly drive, various makes.
Cheers
AnswerID: 57714

Reply By: jasep - Sunday, May 09, 2004 at 17:38

Sunday, May 09, 2004 at 17:38
on the gu the sub tank pumps to the main tank for 10 seconds` on start up so i think if tere is no fuel in the sub it will pump dry which will make idle rough or cough as i like to call it.my gu coil cab does the same thing whenj sub tank empty?
AnswerID: 57861

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