TWO UNKNOWNS... (Page 2/2) eti engineer JUN 15, 07:05 PM quote Originally posted by Will: Since your engine is an '88, you should have a tubular part that installs to that hole by the filter and puts the oil pressure sender up near the belt where you can access it for replacement from the top rather than having to get under the car to do it. Not sure what that says about what GM thought of their oil pressure senders... The second photo is the location for the coolant temp sensor, but it should be on the rear head on the driver's side... so they put the heads on the "wrong" bank. Just swap the plug from the "rear" head to the "front" head.... use teflon tape to seal the threads. Are you re-doing the wiring? There's also a three wire CTS that can drive your dash gauge as well. That means you only need one sensor instead of two and your gauge and computer are reading from the same point on the engine. Got it. I made a mistake. I thought I was supposed to move the sensor to the other head, but it only makes sense to pull the plug from the other head and move it. DUH!!!! I sometimes need to hear things twice before I get it. Hey!!! I'm 71!!! Give me a break!!! (LOL) eti engineer JUN 15, 07:08 PM quote Originally posted by Will: Since your engine is an '88, you should have a tubular part that installs to that hole by the filter and puts the oil pressure sender up near the belt where you can access it for replacement from the top rather than having to get under the car to do it. Not sure what that says about what GM thought of their oil pressure senders... The second photo is the location for the coolant temp sensor, but it should be on the rear head on the driver's side... so they put the heads on the "wrong" bank. Just swap the plug from the "rear" head to the "front" head.... use teflon tape to seal the threads. Are you re-doing the wiring? There's also a three wire CTS that can drive your dash gauge as well. That means you only need one sensor instead of two and your gauge and computer are reading from the same point on the engine. Got it. I made a mistake. I thought I was supposed to move the sensor to the other head, but it only makes sense to pull the plug from the other head and move it. DUH!!!! I sometimes need to hear things twice before I get it. Hey!!! I'm 71!!! Give me a break!!! (LOL) I have ordered all new sensors from the Fiero Store. They should be here in a couple of days... Patrick JUN 15, 07:28 PM quote Originally posted by eti engineer: So should I just plug this opening? My car has AC. Well no... you still need to make use of that port for your oil pressure sender. It seems that you now appear to be missing the piece(s) mentioned by Will. quote Originally posted by Will: you should have a tubular part that installs to that hole by the filter and puts the oil pressure sender up near the belt... Will JUN 16, 07:20 AM quote Originally posted by Patrick: Well no... you still need to make use of that port for your oil pressure sender. It seems that you now appear to be missing the piece(s) mentioned by Will. [QUOTE]Originally posted by Will: you should have a tubular part that installs to that hole by the filter and puts the oil pressure sender up near the belt... [/QUOTE] Depending on whether OP or the shop took it out, it may be difficult to recover. I *think* have the one that came off my '87 engine when I first did the Northstar swap. Send me a PM this weekend and I'll snag a pic.