My egt probes are acting strange and i'm about to replace them all. Any ideas would be really appriciated. First a a little history.. I replaced the carb and single drive dual mag setup on my o320 with an electronic fuel injection electronic ignition system from realworld solutions. After a few growing pains
it seems to be working great. I'm at the point of fine tuning things now and really need my egt probes to be working correctly. Unfortunately they are providing strange readings. To further complicate the issues I replace my steam gauges with an mgl voyager. I have no reason to believe the voyager is the source of my strange readings as the problem, at least, kinda seems to follow the probes. Anyway ... Since the upgrade my #1 egt is usually low, usually 400 degrees lower than the #4. Typically 1- 990, 2- around 1200, 3- around 1300, and 4- around 1400. At high idle #1 stays around 600, with all the rest around 1000. Now is where is gets confusing. I swapped 1 and 3 probes and then both started reading low. The original #1 probe, now in the #3 cylinder was still the lowest, but the #3 probe, now in the #1 cylinder started to read Almost as low. Swapped them back and when back to how it was before. Swapped the leads at the mgl unit(cylinder 1 &2) and the # 1 started reading low..... Ok ...no problem with the mgl unit... Must be a probe... Swapped back and replaced #1 probe. Still reads low and now I have a splice in the line!!! Put original probe back and placed all probes in the end of my head gun. All probes seemed to be seated the same distance in and in the same positions. Now I get a spread of 150 degrees from the highest to the lowest 850-1003)!!! And...... the #1 probe is not the lowest.... It's in the middle!!! I'm about to scrap all four and buy new ones. These have 340 hours on them and I think they are Falcon brand. Any ideas be for go crazy!!! Also I have swapped Injectors and checked for air leaks by switching to the backup efi system (one large throttle body injector instead of four port injectors) and the strange reading still persist. Please forgive any typos.. Long post for an I-phone!
it seems to be working great. I'm at the point of fine tuning things now and really need my egt probes to be working correctly. Unfortunately they are providing strange readings. To further complicate the issues I replace my steam gauges with an mgl voyager. I have no reason to believe the voyager is the source of my strange readings as the problem, at least, kinda seems to follow the probes. Anyway ... Since the upgrade my #1 egt is usually low, usually 400 degrees lower than the #4. Typically 1- 990, 2- around 1200, 3- around 1300, and 4- around 1400. At high idle #1 stays around 600, with all the rest around 1000. Now is where is gets confusing. I swapped 1 and 3 probes and then both started reading low. The original #1 probe, now in the #3 cylinder was still the lowest, but the #3 probe, now in the #1 cylinder started to read Almost as low. Swapped them back and when back to how it was before. Swapped the leads at the mgl unit(cylinder 1 &2) and the # 1 started reading low..... Ok ...no problem with the mgl unit... Must be a probe... Swapped back and replaced #1 probe. Still reads low and now I have a splice in the line!!! Put original probe back and placed all probes in the end of my head gun. All probes seemed to be seated the same distance in and in the same positions. Now I get a spread of 150 degrees from the highest to the lowest 850-1003)!!! And...... the #1 probe is not the lowest.... It's in the middle!!! I'm about to scrap all four and buy new ones. These have 340 hours on them and I think they are Falcon brand. Any ideas be for go crazy!!! Also I have swapped Injectors and checked for air leaks by switching to the backup efi system (one large throttle body injector instead of four port injectors) and the strange reading still persist. Please forgive any typos.. Long post for an I-phone!
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