UCF21 ignition coil resitance
#2
Lexus Champion
#4
Lead Lap
Thread Starter
I got the service manual. Nothing about ignition coil resistance. Every other resistance, no coil resistance.
Good I didnt waste 15 bucks on that
Good I didnt waste 15 bucks on that
Last edited by Greg5OH; 02-27-14 at 03:58 PM.
#6
Moderator
A wise guy wouldn't ask such a question. It is a vain to know the internal resistances for the ignition unit after 98 except the insulation resistance.
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#9
Moderator
The ignition unit after 98 is not simple coils and the core any more. It's a module and it also contains semiconductors and resistors as well. Coils are connected to the drive circuit and only a secondary winding of the high voltage side is exposed and you have no idea to check the resistance of both end of coils. Other terminals are connected to the drive circuits which can't be judged the goodness only measuring the resistance.
A classic style of mechanics/owners don't know modern engines well enough and waste a lot of time and efforts just trying to measure the resistance. It's not a smart idea to troubleshoot trying to measure only that. A smart guy can check it by a simple, better and quick way. Are you interested in how to do it?
I'm ready to introduce the way to people but I hope you would donate 1 US dollar to those who are still suffering from the Biggest Quake and Tsunami disaster happened 3 years ago in Japan.
#13
Lexus Champion
how often does it happen, and when was the last time you checked for codes?
just because there is no check engine light on, doesn't mean there are no codes
just because there is no check engine light on, doesn't mean there are no codes
#14
Lead Lap
Thread Starter
i checked after i got home from it happeneing once on my little trip to the gym.
happens randomly. happened 6-7 times on my 250 mile trip once, then few days later on the way back it didnt do it at all. sometimes will do it when engine is bone cold, other times at operating temp. no predicting it, no pattern,
happens randomly. happened 6-7 times on my 250 mile trip once, then few days later on the way back it didnt do it at all. sometimes will do it when engine is bone cold, other times at operating temp. no predicting it, no pattern,
#15
Lexus Champion
a crank sensor going out could do this, or even a cam sensor (either the sensors themselves or a short in the wiring) but these situations would typically register a code.