2006 mercedes s430 170xxx miles, no codes on scanner
Long story short before I got the car it sat for around 4 years that I know of, could've been longer, I got the car in late March of this year it ran and drove with no issues up until maybe a week or 2 ago it randomly quit starting and just crank over and over. I shot some fuel down the intake and it ran and immediately died, so I crank it again and simulated normal rpms, it ran rough & died when I took my foot off of the pedal. I started it up again and it ran on its own but still rough. I'm getting good pressure at the rail and I hear the fuel pump prime when I turn the key
Thanks in advance
Well check the pressure at the fuel line right on the engine. If you have pressure there, it's not the pump. If it's sad for all those years odds are the fuel injectors are all clogged up as is everything else that's in the fuel system.
@scottykilmer forgot to say that now it just cranks over and over again, but surprisingly the fuel injectors are good and I'm getting more than good pressure at the fuel line, the filter was good also. I checked spark and it was orange (weak spark?) instead of blue but even a weak spark will ignite right?
forgot to say that now it just cranks over and over again, but surprisingly the fuel injectors are good and I'm getting more than good pressure at the fuel line, the filter was good also. I checked spark and it was orange (weak spark?) instead of blue but even a weak spark will ignite right?
Scotty doesn't answer follow-up questions within the same thread, unfortunately. If your spark plugs are worn out (the gap within the spark plug has departed from factory specs) you won't get enough of a spark to ignite gas. Atomized gas may sometimes ignite with weaker spark, but it won't ignite consistently/ or at all if the spark is weak enough.
All a spark plug is, is basically a timed capacitor. When it comes time for that spark plug to fire, there's enough voltage in the spark plug to jump the gap between the cathode and anode. The near-constant sparking, combined with exposure to temperatures approaching 1900⁰F will eventually to eroding spark plugs.
The ignition point must be around 500⁰F for the gasoline to ignite. If the temperature of the spark is not hot enough to ignite the gas, the engine won't run. This is probably why the spark plugs have become more reddish. Spark plugs that appear orange when they spark won't ignite gas. You can visually tell whether or not the temperature of a spark plug is hot enough; good spark plugs ignite with a bluish hue (that's a spectography thing, hot sparks have blue hues, kind of like stars, bluer means hotter).
Anyways, you may be able to get iridium spark plugs instead of platinum plugs. Iridium is a much harder metal vs. platinum, and they will take a lot longer to wear out.
