Infinity G20 '99 transmission does not shift from 1-2 or 2-3 gear until 3200 RPM & shifts very hard, fluid is clean & full. It has 216,000 miles and problem started this morning just as I pulled out of driveway and put it in D it shifted hard and jerked the car and then each gear changed just as hard at a much higher RPM.
Hi My Name isXXXXX you for using Just Answer.com I am an Infiniti Master Technician and I will do my best to assist you with your QuestionWell this could be as simple as a weak battery. Is your check engine light on?
Yes check engine light is on.
Do you know what diagnostic trouble code or codes you have? You can have them scanned for free at any AutoZone. Get me the codes and I can assist you further.Ryan
1) P0105 manifold absolute pressure/baro circuit2) P0304 cylinder 4 misfire detected3) P0450 evaporative emission system pressure sensor/switch4) P0510 closed throttle position switch5) P1705 TP Sensor A/T6) P1447 evap purse flow/mon7) P0450 evaporative emission system pressure sensor/switch8) P0105 manifold absolute pressure/baro circuit9) P1705 TP Sensor A/TAlso, twice on days prior the engine stalled upon take off from a stop light.Thank you for your patience it took a couple of days to use my daughters OBD2 tool
Wow that is a lot of codes. I will need to research and think about how they are related and causing your issue. I will post a response later todayRyan
Hi Ryan, Are you still researching or are you leaning toward more than one problem. I found a vacuum line broken off at the air tube between the the air filter and the air intake/choke plate. I still have not repaired line or started the engine.
Still researching I had a feeling this is more then one problem. How long has the light been on?
Light has been on for at least 3 months.
Okay that's plenty of time for other problems to arise. Did this light come on when this problem first occurred?
No this transmission problem problem (late to shift) is what caused me to park it and contact you for assistance.
Alright I will have A few things for you to check How handy are you with cars?
I am very handy with cars, I already replaced the front and rear seals on this car.
Ok I am curious as to what codes are stored in the transmission system. Do you have access to a scan tool?
I have access to a OBD2 Tool
We need one that can do more then pull engine codes. I think your shifting problem has something to do with your throttle position sensor. I would like to know what failure code is in the transmission system. Have you noticed if the OD light flashes just after start up?
Yes, it stared flashing the day before the problem started.
Ok so there is a failure code set. I will find the manual procedure to pull flash codes. I will post it tomorrow.Good nightRyan
Ok, thank you for your patience and diligence.
your welcome im still working on it
I found the procedure it is not commonly done anymore. Give this a try and let me know what flash codes you find.Ryan
Just as you previously thought, the third judgement flicker was longer, "go to throttle position sensor"
Ok great! I may have your answer I was looking at the wiring diagram and found a common link for most of these codes. Please check the 10 Amp fuse #7 in the fuse box in the car. I think you will find it blown. Try replacing the fuse and see if it will hold. If it blows right away let me know. Here is the location. Ryan
Fuse # XXXXX is not blown
Ok it was worth a try. I will work on a procedure to check the TPS and related failures.Ryan40914.6628118866
Thank you for you patients
Hey Ryan,I went and bought a throttle position sensor and after I replaced it ALL IS SHIFTING CORRECTLY!Thank you very much for all of your help and I am extremely pleased with your diligence and help.
That's great! I'm glad the TPS fixed the issue. Ryan