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| 2017 Anti-Chuff Thread |
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| dkersten:
--- Quote from: Nephasth on July 07, 2017, 01:42:22 am ---It's summer... Glow plugs don't mean much right now. Heat of compression from cranking over many times is more than enough to get a diesel started in the summer months. You have a fuel delivery problem. --- End quote --- I would agree with this, simply because there isn't much else on a diesel that can cause it to not fire, lol. But I wonder what fuel delivery issues aren't going to throw a code. I suppose it depends on the year of the truck.. older it is the less likely it will catch a problem like no power to injectors or a failed fuel pump. I'm no expert though, so for all I know you could have something as simple as a cracked fuel line causing loss of prime and no sensor to determine if you have fuel pressure or not... I had a problem on a gas engine (86 nissan) recently that I never would have guessed - wouldn't start or even fire a little, right after I just drove it. Drove to get some hardwood at a cabinet shop, loaded the truck and it wouldn't start. Acted just like fuel delivery issue. Thing is, it happened when fuel was low, and after I ran and got gas, it fired up, so I thought it was just a bad gas gauge and I ran out. Then it happened again after filling it. Was running one minute, then after gassing up it wouldn't start. The cause turned out to be the coolant temp sensor stuck reading -40*. It was choking the hell out of the a/f mixture, which was fine when engine was cold, but not so much after it warmed up.. Problem solved, right? Then a few weeks later, my son drove to a store, and when he came out, it wouldn't start. Fuel gauge was low again, but not empty, so we figured for sure this time it was fuel. Gassed it up and still nothing. Turned out this time it was the coil - it had cracked on the bottom, arc'd, and took out the distributor and electronic ignition. What a pain. In both cases I would have sworn it was fuel delivery related. |
| RandyT:
--- Quote from: dkersten on July 07, 2017, 02:40:05 pm ---I would agree with this, simply because there isn't much else on a diesel that can cause it to not fire, lol. But I wonder what fuel delivery issues aren't going to throw a code. I suppose it depends on the year of the truck.. older it is the less likely it will catch a problem like no power to injectors or a failed fuel pump. I'm no expert though, so for all I know you could have something as simple as a cracked fuel line causing loss of prime and no sensor to determine if you have fuel pressure or not... --- End quote --- Unfortunately, there's a lot which can go wrong with fuel delivery on some of these vehicles. On mine, the injectors are driven by oil, so if any part of that system fails, the injectors don't work. While the injectors themselves are part of the fuel delivery system, the systems which make them work are more loosely related. A plugged oil filter could even stop the flow of fuel, but I would still expect to see some kind of code. |
| Nephasth:
Randy... ::) I find it mildly hysterical you're trying to attempt to troubleshoot a vehicle problem without the vehicle in front of you. "Engine cranks, but won't start - no CEL" has probably one of the biggest troubleshooting trees of any vehicle problem. You gotta follow the troubleshooting steps. If you skip a step, you'll waste time for nothing. My previous years of experience, lean my thought more towards a fuel delivery issue and not an electrical issue, since it cranks over fine (one of the first steps of almost any troubleshooting tree is to check the battery connections). But, to reiterate, follow the proper troubleshooting steps. If you can't, take it to a technician who is capable. And Randy, don't forget about the fuel return line... if that's obstructed, engine no runny. Point is, there are many components that could fail in a fuel system. Don't be just a parts changer. Find the problem, fix the problem. Don't shotgun ---steaming pile of meadow muffin---. |
| Howard_Casto:
Hey in a recent thread he went on to try and explain the effects of alcohol on rubber even though I worked almost exclusively on printers (which often require a touch of alcohol on their rubber parts for cleaning) for a 4 year period. Don't feel bad. ;) |
| Nephasth:
It's hard to feel bad when you're laughing... :lol |
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