mark69sportsroof 31 Report post Posted May 14, 2017 Hi Everyone, I was wondering what brand of temperature sender is everyone using. I have a FE 390-4V. The car has the factory tach and gauges. Is one brand better than another? Thanks Mark Quote Share this post Link to post Share on other sites
Brian Conway 264 Report post Posted May 14, 2017 The after market senders are notoriously unreliable. I searched for and found a nos sender for my car and have not had any problems. I should also mention that I rebuild the entire cooling system as well. Brian Quote Share this post Link to post Share on other sites
barnett468 418 Report post Posted May 14, 2017 yeah, nos or used orig from ebay. 1 RPM reacted to this Quote Share this post Link to post Share on other sites
mark69sportsroof 31 Report post Posted May 14, 2017 Thanks Brian and Barnett. If I read the chart correctly I would need the C9WY 10884-A (SW 888). Thanks Mark Quote Share this post Link to post Share on other sites
barnett468 418 Report post Posted May 14, 2017 8 minutes ago, mark69sportsroof said: Thanks Brian and Barnett. If I read the chart correctly I would need the C9WY 10884-A (SW 888). Thanks Mark you should also check the temp just behind the t stat housing with an infra red then look at your gauge to see where the needle is so you have a reference point. Quote Share this post Link to post Share on other sites
mark69sportsroof 31 Report post Posted May 14, 2017 Barnett, thanks again for recommendations. I checked ebay and didn't see any available. Mark Quote Share this post Link to post Share on other sites
Dave R. 85 Report post Posted May 14, 2017 Try allclassicmustang.com for your sender. They have lots of used and NOS parts. Dave R. Quote Share this post Link to post Share on other sites
mark69sportsroof 31 Report post Posted May 15, 2017 Thanks Dave. I haven't heard of that website. I will check them out. Mark Quote Share this post Link to post Share on other sites
mwye0627 44 Report post Posted May 15, 2017 On 5/13/2017 at 10:58 PM, barnett468 said: yeah, nos or used orig from ebay. When people say the aftermarket sending units are no good, is it because they quit working, or are they inaccurate with a stock gauge??? I have been developing custom gauges for older muscle cars, but I use modern digital technology to drive miniature stepper motors like in many modern cars, and I can write the transfer function for any sending unit as long as it is repeatable. I have also found sources for thermistors which would thread into the intake manifold like a stock sensor, but they will not read correctly on a stock gauge. I'm looking for a repeatably accurate aftermarket sending unit that I can use so my customers could find an aftermarket source if necessary... Thanks, Mike Quote Share this post Link to post Share on other sites
mqu02 30 Report post Posted May 16, 2017 4 hours ago, mwye0627 said: When people say the aftermarket sending units are no good, is it because they quit working, or are they inaccurate with a stock gauge??? I have been developing custom gauges for older muscle cars, but I use modern digital technology to drive miniature stepper motors like in many modern cars, and I can write the transfer function for any sending unit as long as it is repeatable. I have also found sources for thermistors which would thread into the intake manifold like a stock sensor, but they will not read correctly on a stock gauge. I'm looking for a repeatably accurate aftermarket sending unit that I can use so my customers could find an aftermarket source if necessary... Thanks, Mike My experience with aftermarket sending units is that they are very inaccurate. I have tried a few of them and their resistance values are off from the factory ones. I have only tied them into the factory gauges though, and the last one I had read way too hot. I then found a used factory one in an old intake manifold, installed it, and it fixed the problem immediately. 1 mwye0627 reacted to this Quote Share this post Link to post Share on other sites
moodster 55 Report post Posted May 16, 2017 Mike, the resistance values are off consistently with the aftermarket sending units. You can fix the issue by putting a resistor inline but not many people want or know how to do that. The original senders do go bad from time to time. david 1 mwye0627 reacted to this Quote Share this post Link to post Share on other sites