What was the problem with the injector harness?

What was the problem with the injector harness?

Engine had been thoroughly maintained, injector harness replaced not long before and absolutely no traces of oil in wiring as well as critical connectors including the red plug. Checked continuity between each individual injector connector & the respective pin in the red plug.

What happens when one cylinder of a Mercedes Benz misfires?

As we know, when one cylinder misfires it becomes an “oxygen pump” and can destroy the catalytic converter in just hours if the PCM does not take any action with the fuel. We had very good injector pulses in the four cylinders mentioned above, but after the misfire returned, the pulses at cylinders #1 and #5 disappeared.

What happens when the injector signal is misfiring?

If injector signal delivery or fuel availability are compromised then a ‘mismatch’ occurs between what the ECU wants (commands) and gets. And it blames it on the injectors by saying the peak charge was off. Fuel availability is an easy one and it usually boils down to a defective FPR or fuel sender. Hope the above makes sense. Jun 30, 2007 13,179

Can a high intensity Spark cause a misfire?

In most cases, you will have found the cause of the misfire by the time you finish testing for high-intensity spark. EGR systems which use a system for injecting exhaust gases into individual cylinders are known to cause symptoms which simulate a misfire condition.

Why does my Mercedes Benz misfire at idle?

The long-term Fuel Trim Value was near 0% and the Loop Status was Open. After turning on the engine, we observed while the engine was at idle that the misfire or “strange vibration” as described by the customer was barely noticeable. No vibrations were felt when we raised the engine rpm while the vehicle was in Park and under no load.

What should I do if my check engine light says misfire?

If your “Check Engine” light diagnosis shows a generic cylinder misfire code, you should start with the most likely culprits first. Fortunately, these are also the cheapest and easiest. Spark plugs are as low as $2 each, and can be swapped in about an hour with varying difficulty.

Can a bad ignition cause a car to misfire?

Many times, failing coil-on-plug ignitions will show an erratic kind of miss and roughness. It might be fine at idle but could buck and jerk randomly when the engine is under load. If you ever experience this, you won’t be able to miss it.

What should I do if my civic engine is misfiring?

Swapping plugs on a ’90s Civic’s inline four cylinder is easier than in a 1970 Corvette’s narrow engine bay stuffed with an LS5 454. You’ll just need a couple of basic tools to get started and our how-to guide. Even if the code reader shows only cylinder No. 1 is misfiring, replace all the spark plugs at the same time.