500KVA Cummins Diesel Generator set cold start/Backfire, been stood for a while and the temperature was -2oC. The controller shut it down after it revved up at the end.
Took nearly 30 mins of cranking to get to that stage, the left bank wasnt firing on 3 cylinders, one it was warmed up the smoke cleared and was sweet as a nut.
+Ahmad Ali If the engine is a "V-12", each exhaust stack carries the exhaust from 6 cylinders, and if one or two cylinders are not "firing" they make white smoke, then the heat from the good cylinders ignites the white smoke causing the flame.
My grandad drove a school bus after he retired and for daycare i'd go with him on his runs. One bus he drove for a long time was an Inline 6 Cummins. I'm now hooked for like lol
Absolutely beautiful. We had 3 big aggreko generators on our site not too long back. They had big cummins v10's in them. Not sure of the model though. When you fired those things up you knew about it.
Bradyn421 I used to work a night shift My neighbour had a race boat with a heavily crammed engine Music to my ears I could fall asleep listening to it My neighbour loved me 😎
Guys the engine is ok. Cummins has a mechanical fuel pressure valve in the center of the block, it crosses over to the other side by internally drilled holes in the block. It's never worked right for Cummins. What it's supposed do is make the engine run in half engine mode for a faster warm up. I had a KTA 50 frack pump engine when we fired her up left bank solid white smoke, right bank solid black smoke. Then we would rev up the engine and smoke goes to normal. We thought about removing the silly fuel valve to solve that problem.
Because when a engine is truly in half engine mode, half the engine is pulling the load, more heat, has to take up the slack from half of the engine not running. Full engine mode all cylinders firing not much heat transferred to the cooling system. The Series MTU 2000 and MTU 4000 come programmed half engine enabled, and is load sinceatif when it get enough load DDEC will kick in the other half of the engine. The above Cummins has a problem with that crazy mechanical half engine setup causing low fuel pressure with then makes the timing retarded on that bank. Remove the crazy fuel pressure valve and problem solved
i suppose that is a v8 engine.the best for me is dispose two fuel pressure pumps,each in common rail disposition feeding four cylinders each,and avoid this mechanical valve.The four cylinders at the left,i think that receive less fuel than the rights, if you see the video,the right cylinders starts up quickly, and no the lefts.cummins engines In argentina cummins engines are one of the best in cold starts,typical the inline six cylinders in common rail version, with one high pressure fuel pump,works perfectly
why everyone one is complaining about white smoke? did you see there is snow every where means in very cold there and if you don't know ever engine gives off white smoke on cold start! .......... even your car does and perfectly fine and tuned engine will still release white smoke!
Must be significantly lower compression in one or more of the cylinders on that one side with it smoking that way, especially since it didn't clear up in the amount of time that it was running, despite the attempts to get them to light up with those high revs. That's probably why it was so hard to get started too.
Armchair mechanics are the worst. The engine is very cold and missing on at least one cylinder. You wouldn't know what low compression looks like if it bit you on the arse.
@@pootispiker2866 if the compression was as high on all cylinders, and they're all drawing in the same air, at the same temperature, then they would all be burning evenly. I'm well aware of how a diesel engine works. Something is clearly not right here. A pump or injector issue I suppose could be another explanation, but in this case I kinda doubt it.
@@torque395 Are you literate? Read the comment made by the uploader- the air temperature was -20C and it took 30 minutes of cranking to reach this state. It wasn't one cylinder not firing, it was 3 misfiring because of the COLD. Engines don't work on whatever video game logic you're dreaming up. Cylinders can light off well before others and stay that way for a long while, especially so on big diesel engines with wide bores like this engine. Doubly so when cold. You say you know how diesel engines work but demonstrate that you don't care to know how the real world works.
@@pootispiker2866 you have psychological issues dude. You are the one who doesn't have a clue...you're either trolling, taking too many drugs, ir not enough. I'm not sure which.
First of all its a Cummins, I've always found the Detroit Diesel and Cats a whole lot easier to start in the cold compared to the Cummins, and they should have installed a engine heater system.
Nah mate, governor. When a big diesel like this is started, it's mostly automatic. Starter motor cranks until a certain time has passed or the engine is firing on enough cylinders to make it turn faster than the starter can, then it disengages. Governor keeps fuel at full (explains the white smoke, unburnt diesel), and when it gets up to a certain rev count it'll throttle down some, that's why it hunts. All big diesels do this to a certain extent. After a while (usually when the engine is at temperature) the governor switches and goes into generating mode where it cranks up to the proper revs for the generator to start working and keeps it there. During the "getting to temperature" stage, it will shut down if the engine revs too fast (on some engines, at any rate). That's why they're mumbling about overspeed.
Actually 'backfire' is relegated to Otto cycle engines (spark ignition)when primary fuel and air mixture fails to ignite in cylinder heat from exhaust system does that job, hence BACKfire. This post ignition is generally accumulated unburned carbon particles that when enough collects in exhaust duct (or pipe), it spontaneously ignites. This accounts for flame (remember fire triangle: heat, oxygen and fuel, 'fuel' being in this isnstance accumulated incomplete combustion of carbon particles).
yes, right for me the problem in the left cyliders(i suppose that is v8 engine) is that compression pressure is less than right cylinders, but one person in this site said that this engine has a distribution fuel pump , and for me this is wrong. for me the idea may be disposse two high pressure fuel pumps,one for the left cylinders and the other for the right cylinders. cummins use common rail system with injector pump and a high pressue fuel pump to feed the common rail.this pump, works for increase the rpm for the engine closing partially the fuel return to the fuel tank, and at full power,the return is prectically closed, and the fuel pressure and fuel volume increses to the common rail.I insist,the turbocharger in the start offers resistance to the intake air flow until it begin to turn.the intake pressure in this moment is negative,(less than the atmospherical pressure).when the charger become to turn this disadventage is much less,and when the charger is in normal turns ,the air flow intake pressure changes to possitive (more than atmospherical pressure) and more air flows to the cylinders.the flames occur because the ignition doesnt occur,because the ignition temperature of the fuel doesnt occur,and the fuel vaporizes,circulating for the exhaust pipes to the outside. If one cylinder fires up,a little spark may ignite the vaporizated fuel in the pipes,ans the big flames occur, in some case the silencers explodes.
Didn't see anythingmeritable. I have a nice Jeep Commando, Barreiros Diesel engined, and he DO the damn same stinky grey cloud, slightly thicker and lasting on Autobahn for more than one-and-a-falf mile! And I fucking love it!
Someone got cheap. That delayed ignition is very hard for the internals. It needs a block heater and / or higher cetane fuel. That engine should fire quickly and produce little smoke.
И не только двигателя, на разрез пришел бульдозер с очень малым пробегом, практически новый, но отвал был прям по середине заварен. Отличный практически новый бульдозер и без отвала, который кстати выдержал несколько дней, а потом лопнул по шву 😂😂😂😂
instead of being the troll here and going beserk at trashman's post : better search the internet WHY volkswagen has the same start up. Volkswagen and many other car companies ( even GM btw) have cheated with the CO² level and how many Liters /100km it uses. So ye : trashman ... your comment is totally legit and funny.
Thumbs up! The perfect maintenance of a generator. Start the cold diesel engine and stop it again before all cylinders (glow plugs defective?) have even ignited.
Oil pressure- 5.9 bar? Holy shit the oil pump is working good. JK=) excellent video and would love to see her brought up to speed powering either the grid, or a few city blocks.
To much fuel building up in the exhaust manifold from bad injectors and injector O-rings. White smoke= weak compression on start or it's very cold or some of the injector O-rings that control the coolant through the injector is leaking coolant into the combustion chamber. Governor is hunting and I don't see this engine lasting long. Also someone used either on it.
Thanx. I knew gasoline engines could easily do it (backfire) since I was a kid. But didn't think the diesels would be likely do it too, until now. Know both could be quite noisy, at times. Noticed modern versions of both engines could be very quiet, conversely.
Definitely NOT backfiring. That would be to fire back through the intake, like with a spark-ignition gasoline engine. What this Cummins did was to misfire, with fuel/air charge(s) randomly being ignited in the exhaust. Very different phenomenon. This engine either has compression or injector problems, lots of them.
Looks like she's got low compression on a cylinder, or a failing turbo. Once she came up to speed all cylinders should have been firing strong, the only option for smoke being black. White smoke means unburnt fuel, this engine was not running right.
+renegadeoflife87 White smoke generally means moisture, black means it's running too rich. With as cold as it was, it would take a bit for the engine to warm up. Once it warms up the exhaust would have cleared up.
