i have a 2003 toyota camry v-6. It it misses at 45 to 65 miles an hr when you are on a flat road with the accelerator barely pushed. It does not miss at idle or during acceleration or de-acceleration. I have ran sea foam cleaner through it. It has 145k miles on it.
Country: United StatesMake: ToyotaModel: Camry XLEYear: 2003Engine: v-6
Just injector cleaner 2 tanks
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Has the check engine light ever come on or has it ever come on and started to flash?
If you power brakethe vehicle, in other words hold the brake while in drive apply throttlepressure to force excessive pressure or work on the engine can you get it toact up and isolate which cylinder is misfiring?
check engine has never come on. The car accelerates great and idles smooth. it reminds me of my suburbun with the cruise control on going down hill it would make the same chugging feeling when i t was trying to slow the vehicle. I don't know if there is a throttle position sensor on the car. maybe its malfunctioning??? Itried power barke and it didn't act up.
This engine uses a drive by wire throttle system. There is a technical service bulletin to address an issue with surging that fits your description exactly. That technical service bulletin number is XXXXX–03 if you Google this number and information four 2003 Camry V6 you can find a copy of it on the Internet. The basic gist of the bulletin is as follows: Some 2003 model year Camry vehicles equipped with the 1MZ-FE engine may exhibit a surging during light throttle input at speeds between 38 - 42 mph with lock-up (L/U) "ON." The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) calibration has been revised to correct this condition. I would also recommend cleaning the throttle plate and bore. This has a tendency to get build up with carbon. The only way to know for certain whether or not the calibration was ever done on your car is to have a Toyota dealer pull-up the calibration ID number of the engine control computer or PCM. Let me know how things go.
Toyota Master Diagnostic
I forgot to mention that this also is not likely a cylinder misfire. That would set a check engine code immediately.