What should I do if my OM642 engine wont start?
The 642 engine uses two mass airflow sensors but their reading is combined into one PID. The MAF sensors are rarely a problem, if you unplug one at a time you should see the same reading as when the other is unplugged. Check the pressure sensors KOEO; intake air, charge air, and exhaust back pressure.
What does it mean when your fuel injector is leaking?
Leaking fuel injectors can cause Oil Thinning At engine shutdown the fuel pressure should maintain operating pressure or just below that for a substantial period of time. Fuel injector pintle, ball or disc seat leaks as well as the bottom O-ring leak on a side feed injector will cause fuel to escape into the intake manifold.
What should the back pressure be on an OM642?
Check the pressure sensors KOEO; intake air, charge air, and exhaust back pressure. The maximum difference between the three is 10 hpa. The backpressure sensor is a common failure on the 642 engines and frequently reads out of range (much higher).
Can a bad FPR cause a fuel pump misfire?
If yes, bad fpr, injector leaky and fuel pump check valve could be culprit. P1406 is for the EGR valve. Different issue from fuel pressure drop. EGR or passages could be blocked by carbon buildup. Intake leak, injector and fpr leak can cause P0300 multiple misfire though.
The 642 engine uses two mass airflow sensors but their reading is combined into one PID. The MAF sensors are rarely a problem, if you unplug one at a time you should see the same reading as when the other is unplugged. Check the pressure sensors KOEO; intake air, charge air, and exhaust back pressure.
Check the pressure sensors KOEO; intake air, charge air, and exhaust back pressure. The maximum difference between the three is 10 hpa. The backpressure sensor is a common failure on the 642 engines and frequently reads out of range (much higher).
Leaking fuel injectors can cause Oil Thinning At engine shutdown the fuel pressure should maintain operating pressure or just below that for a substantial period of time. Fuel injector pintle, ball or disc seat leaks as well as the bottom O-ring leak on a side feed injector will cause fuel to escape into the intake manifold.
If yes, bad fpr, injector leaky and fuel pump check valve could be culprit. P1406 is for the EGR valve. Different issue from fuel pressure drop. EGR or passages could be blocked by carbon buildup. Intake leak, injector and fpr leak can cause P0300 multiple misfire though.
How can I diagnose a small engine problem?
In order to easily diagnose problems, it helps to first understand how an engine actually works. Engines roar to life through a process called combustion. Combustion is nothing more than a controlled explosion that creates your engine’s power, turning it into a usable mechanical force to get work done.
What to do when your small engine wont start?
If the engine seems like it is hard to start or runs rough, checking the condition of the fuel is one of the easiest fixes you can make. If you suspect that your machine has expired gas inside, exchange it with fresh gas and add a couple bursts of starting fluid to the carburetor; it should come back to life.
Why is my 155700 diesel engine not starting?
155700 (P155700) [Stored] Engine cannot be started. (Blocking) Note: On the Sprinters The B+ connection at the starter is a splice that feeds power to the alternator and sometimes it melts and causes charging system (and possibly) cranking voltage drops.