I have a 86 6.2 out of a milatary truck with a ats tubo.I have a few problems was looking for some answers.
1st:It starts hard when it is cold all glow plugs have been checked and are good don't see any air in fuel.I will put my foot to the floor as my manuel says and turn engine over and it starts but idles ruff for a while and it smokes alot looks like white smoke?Starts up good if it is pluged in or is warm.
2nd:When it starts and I take off it has alot of power reves fast and boost jumps up fast but when the choke or whatever switches of you feel a big diference in power a loss of?
3rd: does anyone make a intercooler or a good air intake systemm for these?The turbo messes it up to hook to stock inlet.

I'am new to the site but your help would be apreciated.

Thanks:Travis

Starting issues sound like glow plugs might not be getting hot enough. Change to manual glow switch and A/C 60 g glow plugs. How is your compression? As to engine running stronger when it is cold, this would be due to the cold advance. Advance your pump timing by rotating injection pump towards drivers side. Do this in 1/16 inch increments.:grd:

I haven't checked the compresion on it it only has 50,000 miles on it plus don't have a compresion checker for a diesel.

I will try to advance the pump and see what happens thanks for the help and were do you get the manual switch for the glow plugs.

Is there a problem with the automatic glow plug switch on these trucks and how long do you haold the manuel switch in as to not burn out the plug?

I'am trying to get more power so when I'am hualing cars up hill I can do so with out loosing to much speed.I also have propane on it to.



Superman

1st:It starts hard when it is cold all glow plugs have been checked and are good don't see any air in fuel. I will put my foot to the floor as my manuel says and turn engine over and it starts but idles ruff for a while and it smokes alot looks like white smoke? Starts up good if it is pluged in or is warm.
2nd:When it starts and I take off it has alot of power reves fast and boost jumps up fast but when the choke or whatever switches of you feel a big diference in power a loss of?
3rd: does anyone make a intercooler or a good air intake systemm for these?The turbo messes it up to hook to stock inlet.

No choke on a diesel engine, what you might be noticing is the Cold Advance Solenoid deenergizing. If you have a late timing problem, energizing the HPCA will make it run better.
Low mileage engine, no air in fuel supply, GPs good, turbo seems OK.
Did the injectors get replaced when they did the motor? Has the motor ever overheated?

Static Timing of the pump may be part of the problem, But I suspect that the internal advance mechanism and transfer pump inside the injection pump are worn and out of calibration.
Solution, rebuild, and when you get it out, tell us what model number is in there. Normal wear and tear with no major parts is pretty reasonably priced for the old 6.2 pumps.

Aftermarket intercoolers are available, but you'll probably have to do all the plumbing on your own, not necessary unless you plan on running more than 12psi boost. Which would be more air than your 6.2 pump can match in fuel.
ATS is an aftermarket add-on turbo, or was, they used to make it for 6.2s, 6.9s, and 7.3s but stopped a long timeago, and I'm pretty sure they won't be able to help you much.

Superman,

Is the engine still in a military body? Did changing the static timing help any? The easiest way to make the glow plugs a manual system is to build a stand alone harness and tie it in to your existing glow plug harness. To do this, trace your glow plug wires back to where the 4 from each side tie together to a 10 gauge wire. Find the conector for the 10 gauge wire. Using a remote solenoid(I preffer to use the stock glow plug solenoid from an 83 6.2 civilian, because it only requires grounding one terminal to make it engage), run a minimum 10 gauge wire directly from the battery to one side of the solenoid. On the other side of the solenoid, connect to the two 10 gauge wires for the glow plug circuit. There are 2 small spades on the front of the solenoid, one of them requires a 12v feed, it can be keyed or direct from battery, your choice, the other terminal goes to a push button starter type switch, with the other leg of the switch going to a good ground. Pushing the switch grounds the solenoid energizing it and turning on the glow plugs. Now, very important, use only 10.5v self regulating glow plugs like A/C 60 G. They can be left on as long as it takes for a good start. They will not get too hot because they are self regulating. A good rule of thumb is 10 to 20 seconds with a cold engine. With a warm engine, you shouldn't need to glow.

TDG could also be right on the money with your injection pump possibly being bad if the engine doesn't respond to advancing the timing.
Hope this helps.:grd:

O.K.I did advance the timing today and it made it rattle louder than before,it also seemed to smoke black alot more when I was flooring it and through out the pedal range.Seemed to have less low end torque with timing turned up.

I forgot to mention the injector pump was rebuilt about 5 years and rebuilt injectors 4 years ago.I originaly thought it was the pump doing the more power when cold so changed it and didn't fix it so changed out injectors same problem that is when I figured to try the internet.I also turned up the pump when the turbo was installed they said 1/4 turn it runs up to 13 psi.

What my problem is towing a heavy load and it slowing down just want to be sure that I'am getting all the performance I can get out of it.A new truck is just to expensive at this time for me.

It is in a civilian truck now and I put there gps in it not the cucv gps.

Is your turbo boost normal? Have you checked your air cleaner? How are your EGT's?

The boost is about 13psi max and seems normal.The air cleaner is good would like a cold air system it has a K.N. filter clean.The egt when coming up from N.C. got high comming up fancy gap so I backed of throttle and keep it at 1100 degrees.Hope to make some headroom soon on this truck.



Thanks:Superman

How about your exhaust? If you have a muffler, maybe it is restricted.:rolleyes:

No muffler 3" straight pipe.

Superman

I bumped the timing back and it seems better have to try it when cold time advance is on.I will let everyone know what happens also built a cold air intake going to install this weekend.

Superman

superman, make sure you take pics of your cold air intake.... I have been thinking of making one as well. i would like to see what you have made...

I have a friend that is a tinsmith and he made a bigger inlet to air cleaner 2"x6" ti 4" round used dryer metal flex and hooked it to the radiator support with a bolt through 4" adapter that a machinest made for me.I'am not sure it is enough air though my boost is slow to rise and I can only get 11 psi without propane and 12-13 psi with propane seems to be using more fuel and looks a little to much black smoke comming from exhaust might turn down ip a little.I will let you know and get some pics let me know your emaiol so I can email the pics to you.



Travis