So I have looked on the site and Google for the last hour or so and I've found a dozen different fixes for this problem including replacing the 3rd and 4th valve's, plugs, air filter, friction coefficient modifier in my ATF, ATF flush, etc.
I assume what will happen is I will describe the problem and then get 20 different answers but in the off chance that I just haven't stumbled upon the thread with the answer here goes nothing.
Bought an 02 TL-S with 125k and it ran fine for a few days and I've been pricing out a timing belt kit and getting ATF and plugs and an air filter and just usual preventative maintenance stuff and before I could do any of that the car shuddered getting on the freeway 2 minutes after starting it one day at around 3k RPM's. It only did it once and there was nothing after the rest of the day. I thought maybe it was plugs or whatever.
It did this a few more times the next day but mostly at like 2k RPM in low gears and no amount of throttle will fix it like is often the case with a misfire from plugs (I also assume a misfire would pull an engine code and there are no codes). It has never done it on the freeway at 70 mph and roughly 2k RPM's and I can even modulate the throttle at higher speeds with no problem. When it does happen letting off the throttle appears to let the car idle just fine and it hasn't died yet. I replaced the plugs anyway and the valve cover gaskets because they were leaking and the shudder is still there (I'm not really surprised).
My question is, is there a good way to do a differential diagnosis on IAT sensor, trans ATF, Trans 3rd and 4th valve, etc?
Thanks for any help
I assume what will happen is I will describe the problem and then get 20 different answers but in the off chance that I just haven't stumbled upon the thread with the answer here goes nothing.
Bought an 02 TL-S with 125k and it ran fine for a few days and I've been pricing out a timing belt kit and getting ATF and plugs and an air filter and just usual preventative maintenance stuff and before I could do any of that the car shuddered getting on the freeway 2 minutes after starting it one day at around 3k RPM's. It only did it once and there was nothing after the rest of the day. I thought maybe it was plugs or whatever.
It did this a few more times the next day but mostly at like 2k RPM in low gears and no amount of throttle will fix it like is often the case with a misfire from plugs (I also assume a misfire would pull an engine code and there are no codes). It has never done it on the freeway at 70 mph and roughly 2k RPM's and I can even modulate the throttle at higher speeds with no problem. When it does happen letting off the throttle appears to let the car idle just fine and it hasn't died yet. I replaced the plugs anyway and the valve cover gaskets because they were leaking and the shudder is still there (I'm not really surprised).
My question is, is there a good way to do a differential diagnosis on IAT sensor, trans ATF, Trans 3rd and 4th valve, etc?
Thanks for any help