First is there a check engine light on? If so, have computer scanned. With any no start, the procedure for diagnosis is as follows:
1: Ignition (Spark at plug)
2: Fuel
3: Mechanical issue (Compression in cylinders)
4: Computer & Sensors (U can check this before spark if you want)
With each step, if you encounter a problem, then you must isolate the problem to that particular system, working your way from one end to the other. For example:
If no spark, check plug, then wire, then for voltage going to coil, condition of wires/connectors to coil, then the coil it self. If all good but still no spark, you have to understand what's needed to have a spark. The computer must first see a signal from both the CKP and The CMP before it tells the coils to fire. So you must check the condition of these sensors as well as the wires/connectors. If all is good, suspect the computer.
The same procedures go for the fuel system.
Feb 4, 2011 at 5:51 AM
