LT1/LT4 Tech 1993-1997

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  #1  
Old 02-12-2012 | 11:12 AM
Wesley Steinke's Avatar
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so i have a 1995 z28 and i was wondering if any one other then me has run into this problem my cars electrical works radio comes on lighths works alarm works everything works until it comes to the engine there is 0 response to the engine when you turn the key and there are no dash warning lights on i hooked to up to the obd2 and it pulled no codes where should i start?
 
  #2  
Old 02-12-2012 | 11:42 AM
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Could be a number of things, but you need to start somewhere.
First, your car has a OBDII diagnostic connector, but the PCM is still OBDI, so you will need an OBDI scanner with a cable that can connect it to the OBDII style connector.
Second, have you tried to see if the starter solenoid is getting power when you turn the key to start? You can connect a test lamp between the small wire on the starter solenoid and ground and notice if the lamp lights when you turn the key to start. If the lamp lights, then most likely the starter is bad. If the lamp does not light then you need to find out why. When you turn the key to start, 12 Volt is sent through the neutral safety switch or the clutch switch (depending on your set up). If the safety switch is closed the power flows to the + side of the start relay coil. Concurrently the VATS module interrogates the ignition key pellet, and if the resistance is correct it will provide ground to the negative side of the start relay coil, and signal the PCM to enable the fuel injectors. If the start relay has the proper conditions it will close the contacts and send power to the starter solenoid control wire. The starter solenoid will then close the main contacts and provide power to the starter.
Third, check all power and ground cables from the battery to the starter and make sure all connections are clean and tight.
 

Last edited by z28pete; 02-12-2012 at 11:45 AM.
  #3  
Old 02-12-2012 | 12:08 PM
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and check your ignition fuse.
 




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