Question about 1992 Mercedes-Benz Mercedes Benz 300 Class

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E300 sprodic starting

Yes, I belive it's fuel injected. I checked the air filter and it wasn't too bad (but didn't replace). Think I should just put in new plugs? What would be gap setting? Thanks for info.

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When you get this kind of problems, you always start replacing plugs, and eventually air filter and fuel filter if they are dirty.
Once you exclude this simple causes, usually is either an injectors problem, or an ECU problem.
ECU is the computer that controls electronic injection and often is cause for the problem.
YOu cannot test or fix the ECU at home, it must be connected to a machine that controls computer and check fuel flow at the same time, you need to do this in a garage.
Start doing the simple things, and eventually go to a mechanic if problem keeps going.

Posted on Jul 22, 2008


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Posted on Jan 02, 2017


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Without knowing more about what you are working on it is very hard to say what the problem might be, but if you have fuel to the rail but not into the engine it would have to be the injectors not opening. I would think to check the ignition pick-up or the crank sensor.

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P0216 DTC - Injection Timing Control Circuit Malfunction and this means the diesel fuel injection pump has a timing failure. This could be that the injection pump timing needs adjusted OR the failure is internal to the injection pump and therefore non-adjustable.

NOTE: If your vehicle is a Dodge Ram with Cummins engine then be aware that fuel delivery problems frequently cause this code. Prolonged fuel delivery problems can cause injection pump failure!

Symptoms of a P0216 DTC may include:
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Possible Solutions: First, simply check if your injection pump timing is adjustable. If so, check the timing and adjust if necessary.

If you think that you may have a fuel delivery problem, then check the lift pump operation. On Dodge Ram with the Cummins engine, the lift pump should produce about 45 oz of diesel in 25 seconds of operation. This can be performed by disconnecting the fuel hose from the injection pump and pumping the fuel into an approved container. Bump the engine over but do not start it. Then the lift pump will operate for 25 seconds. If the fuel is aerated, then check/repair fuel line and recheck.

With the fuel hose connected the fuel pressure should be 10psi. If the fuel delivery tests fail, replace the diesel fuel filter and recheck.

If it still fails then verify there are no restrictions in the fuel tank

Then replace the lift (transfer) pump. IT SHOULD BE NOTED that if this code surfaced after a routine fuel filter replacement or if you have any of the above symptoms after routine fuel filter replacement, then suspect the fuel transfer pump. This occurs because even a weak transfer pump can still provide enough fuel for the engine to run. But when the fuel system\'s prime is lost due to fuel filter replacement, it may not restart again without fixing the fuel delivery problem.

If you found your injection pump to be bad, the lift pump should be checked for operation to protect the new injection pump. This is because weak or low output from lift pump are common cause of injection pump failure. There are some aftermarket kits that can be purchased to warn the operator when the fuel pressure/volume drops to level that could damage the injection pump.

Hope this helps (remember to rating this free answer and leave a testimonial comments).

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