Just bought a 07 Nissan sentra ser spec V engine swings but wont start was in anticipo accidenti with front end damage nothing hit engine no cracker or anything. Has spark. Any suggestions on what could be the problem. Would like to get the car. Up and running A.S.A.P
I put fuel down the intake made a a quick crank almost to start and jus began swinging again I put on a scan tool not showing any codes. Person who check it said may have jumped timimng on impact in the accident.
Car has spark, has fuel, but wont start. The theft system came off and the car jus swings but wont start. It has compression. Could it be a sensor or something that could shut down the car due to tthe accident.
If the compression is within specs, if the fuel pressure is within specs, if it is getting spark to the plugs and plugs aren't fouled, if the fuel injectors are operating, it should run. To test to see if the fuel injectors are "firing," use a noid light. It plugs into the fuel injector harness plug and will flash if there is power to the injectors and the ECM is pulse grounding the injector to "fire" it. Power to the injectors can tested with a 12v test light, as they are fed battery voltage. The ground circuit would need to be tested using an ohmmeter from the injector harness plug to the appropriate pin in the ECM harness plug.
One note: make sure tested items are within proper spec using testing equipment. I'm not say you would, but I have had people tell me they have proper fuel pressure because the disconnected the fuel line from the filter of a vehicle and turned the key "on" and saw fuel coming out of the hose. Or, they pulled the plugs and cranked the engine and fealt air coming out of the spark plug holes and assumed they had compression. This is not proper testing and can lead to a lot of "hair pulling."
I found this...
short version: you had battery disconnected from instrument cluster for long period of time.
long version: Circuit Description
The PCM has a memory area where it stores certain data it needs to save when the key is turned OFF. This area is called Keep Alive Memory. This diagnostic test monitors the PCM's keep alive memory for a loss or unintended change of data. If such a condition occurs, DTC P0603 will set.
Conditions for Running the DTC
Conditions for Setting the DTC
Keep alive memory checksum does not match previous checksum.
Action Taken When the DTC Sets
Clear all keep alive memory locations.
The Malfunction Indicator Lamp (MIL) will not illuminate.
No message will be displayed.
Conditions for Clearing the DTC
A History DTC will clear after forty consecutive warm-up cycles with no failures of any non-emission related diagnostic test.
A Last Test Failed (current) DTC will clear when the diagnostic runs and does not fail.
Use a scan tool to clear DTCs.
Interrupting PCM battery voltage may or may not clear DTCs. This practice is not recommended. Refer to Clearing Diagnostic Trouble Codes in PCM Description and Operation.
If the battery has been disconnected for any reason DTC P0603 will set. The PCM keeps a running check on the memory; if memory changes it resets. An intermittent loss of power or ground to the PCM will cause a reset.
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