diesel engine shudder when starting

Submitted: Tuesday, Jan 13, 2009 at 17:40
ThreadID: 65091 Views:3110 Replies:7 FollowUps:7
This Thread has been Archived
Hi I have a 1992 75 series troupcarrier , it has developed a shudder when i start it up sometimes , it feels as though it is giong to jump out . and i should mention that it has only done 130,000 km sinse new .

Anyone have any ideas , or where a good diesel mechanic in melb is that knows land cruisers ?
Back Expand Un-Read 0 Moderator

Reply By: Member - Tour Boy (Bororen) - Tuesday, Jan 13, 2009 at 17:56

Tuesday, Jan 13, 2009 at 17:56
Engine mount broken, lazy injector or lazy glow plug would be the first things I'd look at.
Cheers
Dave
Cheers,
Dave
2010 Isuzu FTS800 Expedition camper
2015 Fortuner
Had 72 cruisers in my time

Lifetime Member
My Profile  My Blog  Send Message

AnswerID: 344138

Follow Up By: Rockape - Tuesday, Jan 13, 2009 at 18:49

Tuesday, Jan 13, 2009 at 18:49
Col,
gotta agree with Dave, now it is gunna be a little warm down there in Vic in the next day or so and if the problem goes away its a glowplug.

It is unusual to break an engine mount, although this will cause the problem. place a piece of timber under he sump and jackup the engine a little, then have a close look at your mounts, also look at the gearbox saddle mount.

Injectors normally just dribble and knock for awhile.
0
FollowupID: 612027

Reply By: Member - Stephen L (Clare SA) - Tuesday, Jan 13, 2009 at 19:10

Tuesday, Jan 13, 2009 at 19:10
Colin
If it is the initial start for the day, very good chance it is a glow plug.
If it is one or more glow plugs, once the engine has warmed up, it should run normal.

Cheers

Stephen
Roxby Downs Special

Lifetime Member
My Profile  My Blog  My Position  Send Message

AnswerID: 344154

Follow Up By: Member - COLIN D (VIC) - Wednesday, Jan 14, 2009 at 07:32

Wednesday, Jan 14, 2009 at 07:32
Thanks Stephen , it does it more when it's hot , it still starts fast , you don't have to crank it over for ages , not ever , icould it still be the glow plugs ?

Colin
0
FollowupID: 612110

Reply By: Member - Doug T (NT) - Tuesday, Jan 13, 2009 at 19:39

Tuesday, Jan 13, 2009 at 19:39
Colin
Low K's for a 92 model, anyhow my 94 model has done that every now and then for the last 500,000 K's , now has 732000 so I wouldn't worry too much, just let it idle out ,


.
still going strong with 836,179 K's

Lifetime Member
My Profile  My Blog  Send Message

AnswerID: 344161

Follow Up By: Member - COLIN D (VIC) - Wednesday, Jan 14, 2009 at 07:35

Wednesday, Jan 14, 2009 at 07:35
This car has been in the family since new the ks are real ,but it sat arround doing nouthing for 6 years , i'ts done 12000 km in 3 months , i hope i get 700000 ks out of this car .

Colin
0
FollowupID: 612111

Reply By: furph - Tuesday, Jan 13, 2009 at 20:25

Tuesday, Jan 13, 2009 at 20:25
My thought it is an (read 1 or 2) injector "leaking down"
This means that the injector seat has lost complete sealing and diesel has leaked out.
On the first start of the day she will crank over and start, but until the leaked out injectors fill and start working you will get that shuddering you are experiencing.
my '97 1hz trayback has done it periodically for years, especially if she is left to sulk in the shed for a few months.
Just like a horse (nearly said hore) that hasn't been ridden for a few months, get her out of the shed and git into it.
AnswerID: 344172

Reply By: burnsy - Tuesday, Jan 13, 2009 at 20:41

Tuesday, Jan 13, 2009 at 20:41
If it does it when cold I agree with everyone else, If it does it only when hot it will probably be a worn injector pump.
Don't worry about it until it gets hard to start.
Mike.
AnswerID: 344174

Follow Up By: Member - COLIN D (VIC) - Wednesday, Jan 14, 2009 at 07:37

Wednesday, Jan 14, 2009 at 07:37
Thanks mike , i will get it checked anyway .

Colin
0
FollowupID: 612112

Reply By: Member - COLIN D (VIC) - Wednesday, Jan 14, 2009 at 07:28

Wednesday, Jan 14, 2009 at 07:28
G'day Dave
Thanks for your reply , i have checked the engine mounts , that's what i first thought , this only happens some times , so i will get the injectors checked out , and the glow plugs .

Colin
AnswerID: 344231

Follow Up By: Member - Tour Boy (soon to be - Wednesday, Jan 14, 2009 at 09:57

Wednesday, Jan 14, 2009 at 09:57
Colin,
Because the problem is when it is warm, that will rule out the glow plugs as they won't activate if the motor is warm anyway.

I had a problem with my old 80 series petrol with the injectors. This was because I had it on LPG and didn't run it on petrol at all for 9 mths.
The LPG bloke said that any impurities in the fuel will sit at the injector and over time will partially block the injectors.
I'm guessing that because the troopie was sitting for 6 mths you may have the same prob.
I virtually rectified mine by putting a bottle of injector cleaner into an almost empty tank so the concentration would be stronger and ran the motor on petrol for about 1 minute per week. After about 2 weeks the prob virtually rectified itself.

Before you get the injectors pulled out (probably due to be serviced anyway) put a couple of bottles (2 x tanks) of injector cleaner thru it an go for a good run, including a long hill at 3500rpm in 3rd gear and see if that fixes it.
You WILL get more than 70,000 km out of the old girl.

You may have to have the top seal replaced in the pump (if not already done) to stop the low sulpher diesel from making it leak.

Cheers
Dave
Cheers,
Dave
2010 Isuzu FTS800 Expedition camper
2015 Fortuner
Had 72 cruisers in my time

Lifetime Member
My Profile  My Blog  Send Message

0
FollowupID: 612139

Reply By: gjcumming - Wednesday, Jan 14, 2009 at 13:03

Wednesday, Jan 14, 2009 at 13:03
I'm guessing you start the engine with the excellerator depressed halfway as per the owners manual??????????? I find this eliminates the shudder at start up. Try with & without and you will know what I mean.
Regards: Grant.
AnswerID: 344269

Follow Up By: Member - COLIN D (VIC) - Wednesday, Jan 14, 2009 at 14:08

Wednesday, Jan 14, 2009 at 14:08
When all else fails read the book , thanks Grant , as stupid as it may seem , i have never read how to start the engine part of the book , but now that you have brought it up , i went and read the book on how to start a diesel engine , held the exellerator down half way as you and the book says and bingo , smoothest start ever , went for a drive , got it hot , turned it off and restarted the correct way and perfect , no engine jumping out of the engine bay,

Thanks again

Colin
0
FollowupID: 612210

Follow Up By: Member - Ian W (NSW) - Wednesday, Jan 14, 2009 at 17:57

Wednesday, Jan 14, 2009 at 17:57
Exactly what I do!

When all else fails, exhausted every avenue - read the manual.

Amazing how mange to sort things out .

Ian
0
FollowupID: 612241

Sponsored Links

Popular Products (14)