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Cant get spark?!

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97JesseGSX

Probationary Member
1
0
Oct 2, 2006
Rockford, Illinois
Ok so i picked up another GST its a 95, and it wont start.I Get no spark from the coil even though it is getting power. and ive tested alot of other things and cant figure it out.. it turns over fine and it has fuel and compression but its not firing

Ive tested the...

1. ecu- thats started another gst so im assuming its fine
2. the coil pack- that worked in another gst,
3. the power transistor- also worked in another car.
4. the plugs and wires are brand new

and im getting power to all of these and im not sure what else to try so anyone with some input on why it wont spark please help? thanks
 
No spark possibilities:

First of all you need to verify if you really do have spark with the plugs you are using. Remove all plugs, and (1 at a time is ok if you have to) clamp their bodies to the engine block, reconnect the spark cable, turn the engine over and watch to see if you have strong spark between the electrodes (you'll be able to see it in daytime just fine).

If spark on some but not all, replace all plugs and/or spark cables.
If no spark on any, your problem has to be one of the following (in possible order of likelihood):
Fuse
Loose connection of ignition wiring/connectors
Coil
Cam angle sensor - CAS
Crank position sensor - CPS
Power transistor (to test: http://www.dsmtuners.com/forums/showthread.php?t=229419)
ECU
MPI relay (this powers the ECU and injectors, will have injector voltage if good)
Bad battery (check battery voltage while cranking)
Ignition wiring open or short
Internal shorting of ignition filter capacitor (possibly intermittent and only with voltage applied, can just disconnect to see effect)
 
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