Hello,
I'm new to the forum, and have learned a lot here. We bought my 83 YO mother a 2006 Limited Convertible with 60K miles on it for Christmas last year. The car is really super clean and looks barely used. We've had several issues since we acquired it and have learned how to fix it here. Here's what we've done so far.
Top not working properly replaced all cylinders for the top, works like a champ.
Died in traffic: Fix changed both camshaft and crankshaft sensors. Problem resolved no codes. This scared the crap out of her, people are idiots and one guy bumped her car to tell her GO she was really freaked out by it. I wish I was there when it happened he'd have some major medical and mechanic bills!
Very hard to start, read on forum, key on and off 3 times fired right away after third cycle. We changed both the fuel pump and filter both were factory, still had factory style clamps on it.
We also did the RCM solder fix just to be sure. We found a suspicious solder joint.

New problem. After we changed the fuel filter and fuel pump it's hard to start now. Really weird... it backfires and when it does start the exhaust is pretty rich (black) Once running runs like a top. It seem to be intermittent. We checked the fuel pressure and it's holding right at 50 PSI. It feels like a timing issue. We replaced all the parts with high quality Bosch as recommended by the forum. I read where someone else described the same sort of issue and he thought it was bad crankshaft sensor wires that were old and brittle. Also when you go to crank it it just runs the starter non-stop. It won't stop turning the engine until you turn the key yourself. I turned it off not to burn something up. Is this a normal thing? On most cars once you release from crank position it just stops. I told my mom maybe we should get her a Camry Solera or something much more reliable. I got a very stern NO! She absolutely loves the car and its styling. Very classy in her words. As a good son I want her to be safe, but these little gremlins worry me. Any help would be appreciated.

Thanks,
Frank