LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Changed all plugs and got a new problem

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Old Jul 16, 2009 | 09:22 AM
  #1  
SmokeyBlaZe's Avatar
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Changed all plugs and got a new problem

Well I finally got around to changing all the spark plugs out. I changed out the wires on the driver side , couldnt really get to the ones on the the passenger side so I left them alone. Went to take it for a ride and at Idle in Drive My Oil Pressure is reading Zero. It reads fine in park but once in gear it drops to zero and only raises with the rpms, It started misfiring on the low end until it gets to about 4500 rpms, I know my oil level sensor looks like it needs to be replaced because its all taped up and there is a little leak there, I am going to try and replace it but I'm wondering why it started missing again? Would it have anything to do with the low oil sensor? Also when I was changing out the spark plugs and wires I found this unplugged, I'm not sure where it go's or what it does , maybe someone will know , it is on the driver side. Thanks in advance.

http://img217.imageshack.us/i/img0311geq.jpg/

http://img223.imageshack.us/i/img0311snt.jpg/

Last edited by SmokeyBlaZe; Jul 16, 2009 at 02:52 PM.
Old Jul 16, 2009 | 09:30 AM
  #2  
Wild1's Avatar
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Seems like it goes to the EVAP.

http://shbox.com/1/evap_sol.jpg

Note the red clip with blue lock on top.
Old Jul 16, 2009 | 10:46 AM
  #3  
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I dont think that is it, the clip in my pic is on the drivers side, and it looks like it has a different tab on it, I added another pic
Old Jul 16, 2009 | 01:27 PM
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Ok so I looked at all the plugs and made sure they were tight and saw that on the passenger side one of the plug wires , I think it was the #4 plug the wire was going around an a/c line and back on to the plug , so I corrected that and checked the oil sensor , noticed its leaking a bit and wiggled it to make sure it was tight, took it for a test drive and its running great. Except for an exhaust leak.

Last edited by SmokeyBlaZe; Jul 16, 2009 at 02:51 PM.
Old Jul 16, 2009 | 03:56 PM
  #5  
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Never mind it started reading zero again...
Old Jul 16, 2009 | 05:19 PM
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Do you have an AIR pump? That connector could be for it.
Old Jul 16, 2009 | 06:26 PM
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So when you wiggle the oil sensor it works?

Hal
Old Jul 16, 2009 | 06:37 PM
  #8  
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i took it off and cleaned it with brake cleaner , there was some bare wires right where they go into the sensor and they were covered with oil. cleaned it up and now its good to go.
Old Jul 16, 2009 | 07:49 PM
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Good to hear you weren't really getting no oil pressure, it was just a free fix no less.

Hal
Old Jul 16, 2009 | 08:54 PM
  #10  
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what should the oil pressure be at in overdrive at a dead stop?
Old Jul 16, 2009 | 09:55 PM
  #11  
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Originally Posted by SmokeyBlaZe
what should the oil pressure be at in overdrive at a dead stop?
????? At idle???? Generally around 10~20 PSI at operating temperture...
Old Jul 17, 2009 | 11:56 AM
  #12  
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It seems like once it go's in to closed loop and I come to a hard stop , the oil pressure gauge drops to the red until I give it more gas , It's fine when driving though.
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