Tudorc
Member
Hi,
I have a 97 Challenger with single 787 that I have inherited and am trying to get working again. The primary symptom is a really uneven idle (similar to bad rectifier video on YouTube) and then bogging throttle is applied. Seeing as I had no idea what maintenance had been done and how recently, I just started with assuming fuel supply was the issue - especially as the carb hi & lo settings were waaay off factory spec and assume someone must have been trying to fix the issue by adjusting those heavily. Engine compression is 135. New sparks, properly gapped.
When I run the engine out of the water the engine naturally revs at 3000rpm and bogs with any throttle. In the water it bogs at around 3000rpm - 3500rpm. In one of my tests, I removed the neutral switch from the equation to see if that was the issue and was engaging the rev limiter - it wasn't. Either way, the bogging is probably a secondary issue(?).
I've rebuilt the carbs, tested pressures/pop-offs and reset to factory spec, changed the fuel filter, changed the fuel switch, checked the fuel sender. Also cleaned very dirty RAVE valves. But the uneven idle and bogging problem persists. I concluded that this was a rectifier issue (and have ordered a replacement) on the basis that there's a YouTube video https://youtu.be/kS1c53_xz_4 that shows exact same symptoms. Yesterday I noticed that the 15a fuse for the charging system in the box is blown - and blew again immediately once replaced.
So could this be both a stator and a rectifier problem that needs both replaced? Is there any way to isolate/test whether it's one or both? And should I risk replacing the rectifier before fixing the stator (if that's an issue) or will a bad stator fry the rectifier?
Total noob here - would really appreciate some guidance.
Thanks.
I have a 97 Challenger with single 787 that I have inherited and am trying to get working again. The primary symptom is a really uneven idle (similar to bad rectifier video on YouTube) and then bogging throttle is applied. Seeing as I had no idea what maintenance had been done and how recently, I just started with assuming fuel supply was the issue - especially as the carb hi & lo settings were waaay off factory spec and assume someone must have been trying to fix the issue by adjusting those heavily. Engine compression is 135. New sparks, properly gapped.
When I run the engine out of the water the engine naturally revs at 3000rpm and bogs with any throttle. In the water it bogs at around 3000rpm - 3500rpm. In one of my tests, I removed the neutral switch from the equation to see if that was the issue and was engaging the rev limiter - it wasn't. Either way, the bogging is probably a secondary issue(?).
I've rebuilt the carbs, tested pressures/pop-offs and reset to factory spec, changed the fuel filter, changed the fuel switch, checked the fuel sender. Also cleaned very dirty RAVE valves. But the uneven idle and bogging problem persists. I concluded that this was a rectifier issue (and have ordered a replacement) on the basis that there's a YouTube video https://youtu.be/kS1c53_xz_4 that shows exact same symptoms. Yesterday I noticed that the 15a fuse for the charging system in the box is blown - and blew again immediately once replaced.
So could this be both a stator and a rectifier problem that needs both replaced? Is there any way to isolate/test whether it's one or both? And should I risk replacing the rectifier before fixing the stator (if that's an issue) or will a bad stator fry the rectifier?
Total noob here - would really appreciate some guidance.
Thanks.
