AppleJack Posted December 26, 2006 Share Posted December 26, 2006 Hi, my 92 SC400 has a light amount of hesitation - and here are the conditions when it occurs: 1. Around 50 - 100 mph and medium acceleration. 2. More noticeable in overdrive gear and not noticed when revving harder in 3rd gear. 3. Moreso when the car is warm and less when cold. 4. Fuel economy is not affected... not yet at least. Here is what I've done: 1. Plugs are less than 2 yrs old - so I pulled each and checked for carbon build up etc.. 2. Wires are less than 2 yrs old - so I've checked them to be ok. 3. Changed both rotors and caps, thought this was going to solve it but - nope. 4. I've been putting premium fuel (and an injector cleaner bottle). ** Here's an interesting thing I did notice. When removing the driver side cap, I looked closely inside the middle contact on the side where the wire is plugged in. This is the wire from the coil...- well it look dis-integrated from tiny arcing or something. This is what led me to replace the caps but the hesitation still persisted. Now the cap on the other side wasn't like this one and I was wondering if I need to work backward on the driver side electrical system - ie. the coil. Is it possible for the coil to have hiccups randomly and cause arcing at the wire or when coils die - do they just die completely. With the new cap in I've been checking every so often to see if the same phenomenon takes place but it's been a month now and now signs - so I'm just living with this annoying hesitation. thanks for any ideas! Quote Link to comment Share on other sites More sharing options...
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