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+--- Thread: Engine looses power some times (/showthread.php?tid=7927)
Engine looses power some times - Kurt45 - 12-16-2017
My first post here...
I drive a GD290 (non turbo), but recently the original engine broke.
I decided the swap it with a turbo version, but could not find any mercedes engines.
Instead i found a ssangyong turbo enigine om662, witch fit right ind, as this engine has a mechanical pump.
Only misfit is, the engine has a ELR control for the idle.
It also has a vacuum control for the idle.
The engine runs well, but some times it loses power for a few seconds and then the power comes back.
If the engine dies during a period where it has lost power, it is were hard to start.
I think it has do with air in the fuelsystem, but all hoses and filters have been changed, all the way to the fuel tank. I still se some bubles in the first filter, but no bubles in the hoses for the fuel pump.
I am starting to suspect the ELR system to cause to problem, as last time the engine died, i put 12V shortly to the ELR unit, and the engine started right afterwards.
Is it possible to hook up the ELR system so it works as intended?
If it not is the ELR that causes the power loses, what is it then, any suggestions?
Photo of the fuel pump:
https://photos.app.goo.gl/njag1qqSUZTJxrW53
RE: Engine looses power some times - barrote - 12-16-2017
Well , welcome...
Witchcraft my friend is very hard to solve...
I deal with all kind of pumps and one like that i never saw before. But anyway the ELR solenoid is not the problem, cause the thing u call ELR in the back of yor pump is the electronic idle increase. Without power does nothing and with around 1 to 7v increases idle for many needs the engine has. The thing on the side of the pump is most probably related to EGR control. And the other for rack position.
But u can always hook the fueling system u had in the previous engine as it will work in that despite the differences as a 662 is a 602...
The witchcraft thing, well fuel starvation shut dwn is easy to troubleshoot. Swap the prefilter in the filter body as that thing is
Is prone to air leaks.
Keep posting we might be able to help.
Regards
RE: Engine looses power some times - Kurt45 - 12-16-2017
Thanks for the reply.
I already swapped the prefilter, and it didn't change anything. I'll try changing the metal filter, but it was all new, as i changed it when i swapped the engine.
For now I have no EGR system, as i couldn't make it fit, as I use an other intake manifold.
I swapped the rackpositioner for a vacuum type for the transmission.
I'm glad that the fuel starvation isn't caused by the ELR system.
Could it be the ALDA system then?
I can't use the pump from my previous engine as it has no turbo.
RE: Engine looses power some times - barrote - 12-17-2017
Hy,
2 things, ALDA/ADA device is a altitude compensation element, as when turbo is blowing there is altitude change inside the manifold. This compensation elements act by restricting fuel flow in the absence of high pressure. (Low altitude) It can restrict as much as 15% of what was previously set by the pump builder. Not enough to stall the engine. One thing is that ALDA/ADA are the same device one is meant for turbo thence high press compensation and the other for N/A engines and compensates altitude , one fit the same place as the other. They do the same job as the ALDA too compensates for altitude.
Second is, i dont know how much your engines differ in fueling , for that i need engine code and pumps PES number. But any 5 cyl pump can be used in any 5 cyl engine. Injection quantity can be modded as wish...
Anyway this is a STD forum i asume u want some kind of power increase. If so PM for details.
The rings pre filter are the problem.... not the filter.
RE: Engine looses power some times - STDGer - 12-17-2017
Did u already look at the diesel heater? I had a 602 na with nearly the same problems, my heater was leaking.
Greetings
RE: Engine looses power some times - Kurt45 - 12-17-2017
Diesel heater??
I don't think the engine has one. The old 602 had some pipes to eat the fuel, but the 662 has no diesel heater.
I will try replace the fuel lines in the tank, as I see air bubles in the prefilter, and i suspect the air come all the way from the tank.
RE: Engine looses power some times - AlanMcR - 12-17-2017
A restriction in the fuel system back towards the tank will cause cavitation and what appear to be bubbles. These bubbles don't come from the outside, but instead they are gasses pulled out of solution by the suction strokes of the lift pump. It is much easier to make a bubble than it is for the bubble to go back into solution. Find a way to see how much resistance there is in the supply pipes. Remember there is a fairly find filter at the actual fuel inlet in the tank. I found mine covered in algae once. I've also hear of people finding debris in the tank that would get wrapped around the filter, then when the engine stopped, the junk would float away.
RE: Engine looses power some times - Kurt45 - 12-19-2017
Problem solved!
Yesterdays work revealed a very tiny hole in the pipe from the tank.
The hole was fixed with some rubbertubing and a clamp.
The fuel system was then bleeded, and now it just runs smoothly.
RE: Engine looses power some times - AlanMcR - 12-19-2017
That pinhole is the canary in the coal mine. Replace the whole pipe, preferably with nylon.