rallyruss Posted December 12, 2005 Share Posted December 12, 2005 well the new motor I built for the RX sounded really good mechanically but ran kinda crappy and had a check engine light on after(and before) replacement. I checked the code and it was a 21 coolant temp sensor circit. removed connector and inspected. nasty green corrosion in the temp sender and the connector. It actually crept up into the wiring too. I think just about every older fuel injected sube I have worked on has had this problem to some degree or another. this one just happened to be bad enough to set a code. I carfully cleanded the connections in the temp sender and replaced the harness connector(used a bosh fuel injector repair connector. motormite part # 85850) used dielectric grease and reassembled. code is gone and engine runs much better now. I only bother to bring this up because I have seen it so many times now and it does affect performance. there are tech articles on this also. the mounting position makes it really easy for moisture to acumilate in the connector. dielectric grease is a must on this connector. do it before you have a probelm if at all possible. Link to comment Share on other sites More sharing options...
Snowman Posted December 12, 2005 Share Posted December 12, 2005 That's some good info, especially since the sensor itself is usually fine, and they're quite expensive. Link to comment Share on other sites More sharing options...
Subarian Posted December 12, 2005 Share Posted December 12, 2005 That's a good point. You can save yourself a lot of trouble by using dielectric on any electrical connection. I even use it when I splice wires with solderless terminals- I just put a little inside the terminal before I insert the wires. Link to comment Share on other sites More sharing options...
TheSubaruJunkie Posted December 12, 2005 Share Posted December 12, 2005 I pulled my temp sensor before my car blew up. The connector was so corroded I thought it was a single wire connector, not until I started to clean everything out I saw there were 2 terminals. After I cleaned everything up, it cleared all 5 ECU codes i had. Car didnt run much better, and a week later is when it spit the rod through the block. I gotta get me some of that electric grease stuff. -Brian Link to comment Share on other sites More sharing options...
rallyruss Posted December 13, 2005 Author Share Posted December 13, 2005 I pulled my temp sensor before my car blew up. The connector was so corroded I thought it was a single wire connector, not until I started to clean everything out I saw there were 2 terminals. After I cleaned everything up, it cleared all 5 ECU codes i had. Car didnt run much better, and a week later is when it spit the rod through the block. I gotta get me some of that electric grease stuff. -Brian usually the connector needs to be replaced. might have saved you a motor if you caught it sooner. I know you were battling that problem for a while. sucks. Link to comment Share on other sites More sharing options...
TheSubaruJunkie Posted December 13, 2005 Share Posted December 13, 2005 Yeah now that I have a part # for the connector you better believe this new motor will have one! -Brian Link to comment Share on other sites More sharing options...
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