2000 Neon NO SPARK
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#2
Still no spark
I still have no spark I have 12V to coil and 8V to Cam sensor and have change everything that I can think of. So know I am going to change the harness inside the car. I have change cam sensor , crank sensor, knock sensor, Coil, Computer, motor harness, and steering colum. Please help
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#5
But do they have good continuity?
Use an Ohmmeter and check the resistance between the body and the engine block. It should be 0 or extremely close to it.
Edit:
Also, how exactly did you check for spark?
The "old man's" way was to take a screwdriver and shove into the spark plug boot while it's not on a spark plug and hold it about an inch away from "ground". You would hear a telltale click, or if done at night a blue to orange spark. depending on how "hot" the ignition is.
By hot I mean by how much voltage is being thrown to the plugs. DO NOT be touching any ground while doing this.. it's not a pleasant experience when 15KV+ goes coursing through your arms. Dunno if this would work on a newer vehicle.
Another note, it's current that kills, not voltage. But it don't take much to do it! Under the right conditions 1/4th of an amp.
Use an Ohmmeter and check the resistance between the body and the engine block. It should be 0 or extremely close to it.
Edit:
Also, how exactly did you check for spark?
The "old man's" way was to take a screwdriver and shove into the spark plug boot while it's not on a spark plug and hold it about an inch away from "ground". You would hear a telltale click, or if done at night a blue to orange spark. depending on how "hot" the ignition is.
By hot I mean by how much voltage is being thrown to the plugs. DO NOT be touching any ground while doing this.. it's not a pleasant experience when 15KV+ goes coursing through your arms. Dunno if this would work on a newer vehicle.
Another note, it's current that kills, not voltage. But it don't take much to do it! Under the right conditions 1/4th of an amp.
Last edited by Isakill; 04-10-2010 at 02:16 PM.
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Have you ohm-tested your coil pack (just because it is new doesn't mean it can't be DOA) and spark plug wires to ensure they are within specs? Are the plugs good? The cam and crank sensors are good? In addition to the coil, the cam and crank sensors make up the three main components of the ignition system.
EDIT: Here's a list from the DSM about crank, but no start possible causes. Might help you narrow down some more testing areas:
NO START PRE-TEST
POWERTRAIN FUSES OPEN
FUEL PRESSURE OUT OF SPECS
RESTRICTED FUEL SUPPLY LINE
FUEL PUMP INLET STRAINER PLUGGED
FUEL PUMP MODULE
FUEL PUMP RELAY FUSED B+ CIRCUIT
FUEL PUMP RELAY OUTPUT CIRCUIT OPEN
FUEL PUMP RELAY
FUEL PUMP GROUND CIRCUIT OPEN/HIGH RESISTANCE
FUEL PUMP MODULE
5 VOLT SUPPLY CIRCUIT
CKP SENSOR SIGNAL CIRCUIT OPEN
CKP SENSOR SIGNAL CIRCUIT SHORTED GROUND
CKP SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
CKP SENSOR SIGNAL SHORTED TO 5 VOLT SUPPLY CIRCUIT
SENSOR GROUND CIRCUIT OPEN
ASD RELAY OUTPUT CIRCUIT
CRANKSHAFT POSITION SENSOR
IGNITION COIL
IGNITION COIL DRIVER CIRCUIT OPEN
IGNITION COIL DRIVER CIRCUIT SHORTED TO GROUND
PCM - COIL
PCM - CKP SENSOR SIGNAL
OTHER POSSIBLE CAUSES FOR NO START
EDIT: Here's a list from the DSM about crank, but no start possible causes. Might help you narrow down some more testing areas:
NO START PRE-TEST
POWERTRAIN FUSES OPEN
FUEL PRESSURE OUT OF SPECS
RESTRICTED FUEL SUPPLY LINE
FUEL PUMP INLET STRAINER PLUGGED
FUEL PUMP MODULE
FUEL PUMP RELAY FUSED B+ CIRCUIT
FUEL PUMP RELAY OUTPUT CIRCUIT OPEN
FUEL PUMP RELAY
FUEL PUMP GROUND CIRCUIT OPEN/HIGH RESISTANCE
FUEL PUMP MODULE
5 VOLT SUPPLY CIRCUIT
CKP SENSOR SIGNAL CIRCUIT OPEN
CKP SENSOR SIGNAL CIRCUIT SHORTED GROUND
CKP SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
CKP SENSOR SIGNAL SHORTED TO 5 VOLT SUPPLY CIRCUIT
SENSOR GROUND CIRCUIT OPEN
ASD RELAY OUTPUT CIRCUIT
CRANKSHAFT POSITION SENSOR
IGNITION COIL
IGNITION COIL DRIVER CIRCUIT OPEN
IGNITION COIL DRIVER CIRCUIT SHORTED TO GROUND
PCM - COIL
PCM - CKP SENSOR SIGNAL
OTHER POSSIBLE CAUSES FOR NO START
Last edited by darthroush; 04-10-2010 at 06:12 PM.
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