Surging 80 series Turbo Diesel
Submitted: Saturday, Jun 24, 2006 at 21:02
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I have a 1991 GXL 1HDT 80 Series Turbo Diesel, 5 Spd Manual, I am only new to the 4WD Scene, (Never owned one before). I have had my 4WD for around 12 months now and from the day I bought it, it has always surged. Only when the engine is cold. Once to operating temperature it no longer Surges. I have replaced fuel filters every 5000 KM's and this doesn't make a difference. Any helpful hints or advice would be appreciated. Other than the Surging I am very happy with the Rig.
Reply By: ross - Sunday, Jun 25, 2006 at 15:49
Sunday, Jun 25, 2006 at 15:49
The turbo diesel has a temperature activated advance mechanism on the fuel pump.
It advances the pump timing when its cold to cut down on emmissions ect.
The hoses from the engine allow hot water to dissolve a wax pellet that realeases the advance mechanism lever when the engine is at operating temp.
The non turbo diesel doesnt have one and it can be safely removed and the cover from a 1HZ pump is used to cover the hole.
This may or may not have something to do with the surging but its the only thing I can think of that changes with the engine temperature.
AnswerID:
180270
Follow Up By: BBB - Sunday, Jun 25, 2006 at 17:01
Sunday, Jun 25, 2006 at 17:01
I am no mechanic but have a read of the CEM add on the
home page of this sight they might be able to help you. They seem to get good rapes on this
forum.
Good Luck
BBB
FollowupID:
436528
Follow Up By: Alloy c/t - Sunday, Jun 25, 2006 at 17:44
Sunday, Jun 25, 2006 at 17:44
A wax pellet that dissolves to release the advance ,,must be school holidays ,?? LOL> I know its not April 1st.
FollowupID:
436531
Follow Up By: ross - Monday, Jun 26, 2006 at 07:23
Monday, Jun 26, 2006 at 07:23
Before you make fun of someones post you should read the FSM .The wax pellet is called the "thermo wax".
This concept is also used to open/close the thermostats on many vehicles inc Fords ect
FollowupID:
436596
Follow Up By: Alloy c/t - Monday, Jun 26, 2006 at 14:36
Monday, Jun 26, 2006 at 14:36
ross ,im not making "fun" of your reply ,, please satisfy our ignorance by supplying a part no /picture /and anything else such as tech specs for this wonderous "thermo wax" as fitted to a tojo turbo diesel and the same for a ford thermostat ,,, or at the very least where this mystical wax is exactly and how it is contained to be reused thousands of times ,,,, told you ,it is not April 1st.
FollowupID:
436658
Reply By: Alloy c/t - Sunday, Jun 25, 2006 at 17:53
Sunday, Jun 25, 2006 at 17:53
Start by cleaning the whole motor ,then get some CEM to clean the inside , new filters fuel / oil / air ,
check to see if any air leaks in the fuel and air systems ,, should be a steady idle @700rpm ,, had a similar surge at 260,000k develop ,did all the above ,have had no probs and now at 355,000k
AnswerID:
180280
Reply By: Kiwi Ray - Tuesday, Jun 27, 2006 at 08:19
Tuesday, Jun 27, 2006 at 08:19
Check that the water level sender unit has a new "O" and has an air tight seal.
This is fitted to the bottom of the fuel filter.
If you feel that the surge is in the warm up stage you can adjust the wax warm up unit out of the sequence to try and elliminate that from the circuit.
Check that there are not small air leaks in the small hoses from the inlet manifold / turbo to the injector pump
Also suggest you get the injector pump's internal pressure checked, this used to be a bit of a problem a few years ago.
AnswerID:
180533