The firing order for the 4.3L engine is 1 6 5 4 3 2
We need to know size engine you have.
Need to know the engine in order to answer this.
Need to know which engine you have.
Do you need the firing order for every E-150 engine made since inception or were you interested in a particular year and size of engine?
Need year and engine size in order to provide an answer.
Need to know what engine is in the vehicle to answer.
Need to know what engine it has to answer that one.
Need to know what engine you have.
No make, model, year, or engine size, = no answer.
This is a very vague question. Almost all engines have different firing orders. You need to ask for the firing order for what model engine you have or need.
Depends on what engine. They are not all the same. Need make, and size engine to answer this question.
The firing order will differ between the engine brands. The four stroke engines do need two revolutions instead of one to complete a cycle, and the firing order usually starts at one. Check for your exact engine for more specific details.