Help identifing these plugs

[JonP]

I just bought this car and it's currently not running. The car was supposably rebuilt but it looks like they half a**ed putting it back together. I'm wondering if any of these connectors that are disconnect have a part in why it's not running (motor turns but doesn't start).

This one is near the firewall:

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This is right next to the master cyclinder:

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This is near the timing belt on the harness that goes to the fuel rail:

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This one is down near the alternator. The wires that split off the harness connect to the alternator:

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[killer_eclipse]

is this the 1990 gst listed in your profile or is it a different car.... it will help out alot there are small differences in the harness between the years.

 

[JonP]

It is the 1990 GST. I think I have 2 of the connectors figured out. The bottom looks like it's suppose to go to the oil pressure sending unit next to the oil filter and the one that is near the timing belt I believe goes to the compressor since it's a one pin connector (person I bought it from I'm assuming bought the wrong compressor as it doesn't connect to that connector).

 

[JonP]

I think I have all 4 figured out (and may not be related to my no start). First one looks as if it were to go to the EGR if there was one. The second looks like a diag plug. Third goes to the A/C compressor (I'm guessing 90 compressor is different then other 1g's?). Fourth I'm guessing goes to the oil pressure sending unit. Can anyone confirm that this is correct?

 

[killer_eclipse]

the one by the master cylinder lookes like the plug that is suposed to go to the vacum silinoids...
the one down by the alternater is for the pressure switch. the one that is by the fuel rail is for the ac compressor... now as far as the one by the firewall what side is it on the pass. or driver and what color are the wires?

 

[JonP]

The one on the near the firewall is more so in the middle. It's a grey plug with a white wire and a black with white line wire. Looks close to the area where the knock sensor is suppose to be.