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Discussion Starter #1
So my tibbys been a whole lot of work. I've replaced the tps sway bars rotors breaks oil spark plugs coil pack for 1and4 the negative connection to the battery battery fuse and my cars still running so weird. I've taken it to two separate places and had multiple mechs look at it and still they don't know what's going on. I've had hesitation problems for a long time. Thought maybe replaced the tps and my air filter and cleaning my maf and other sensors would help... No it did nothing. It's just now my car randomly won't let me go back into 1st or up to 4th. It doesn't down shift automatically when in drive. Recently I've been trying to do some tests with it and if I have the gas pedal half way down it accelerates but if I push it more than half way it drops like my foot isn't even on the gas. I don't have o2 sensors in it but I feel as tho o2 sensors won't make my car shut off randomly and won't make my car jump and jolt and not change gears.some one please help me...
 

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Without o2 sensors your car is running crazy rich, doesn't know how to safely idle and floods itself when you hit the gas. Why in the world are you running without o2 sensors? Did you mean the secondary emissions sensors? Your transmission is much harder to diagnose when connected to a non-functional engine.
 

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Where are you located? For example in South Africa the GKs don't have emissions equipment or O2 sensors. It sounds weird but its true. The ECU tune is VASTLY different between cars in SA and every other country.
 

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Without o2 sensors your car is running crazy rich, doesn't know how to safely idle and floods itself when you hit the gas. Why in the world are you running without o2 sensors? Did you mean the secondary emissions sensors? Your transmission is much harder to diagnose when connected to a non-functional engine.


When I bought it there weren't any. Ran a scan on it and that popped up. For all of them bank 1 sensor 1 and 2 and bank 2 sensor 1 and 2
 

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Where are you located? For example in South Africa the GKs don't have emissions equipment or O2 sensors. It sounds weird but its true. The ECU tune is VASTLY different between cars in SA and every other country.
I'm in North America they are needed to pass emissions tests
 

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WTF? You bought it in the US of A and it had no O2 sensors? Do you have any kind of history on the vehicle? How many miles? What year? If the car has no O2 sensors you should be in limp mode and not be able to rev past 3k rpm. The ECU's going to be all kinds of pissed off.
 

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WTF? You bought it in the US of A and it had no O2 sensors? Do you have any kind of history on the vehicle? How many miles? What year? If the car has no O2 sensors you should be in limp mode and not be able to rev past 3k rpm. The ECU's going to be all kinds of pissed off.

The o2 sensors are supposed to go in on Monday so we will see how it goes after that.
 

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So my tibbys been a whole lot of work. I've replaced the tps sway bars rotors breaks oil spark plugs coil pack for 1and4 the negative connection to the battery battery fuse and my cars still running so weird. I've taken it to two separate places and had multiple mechs look at it and still they don't know what's going on. I've had hesitation problems for a long time. Thought maybe replaced the tps and my air filter and cleaning my maf and other sensors would help... No it did nothing. It's just now my car randomly won't let me go back into 1st or up to 4th. It doesn't down shift automatically when in drive. Recently I've been trying to do some tests with it and if I have the gas pedal half way down it accelerates but if I push it more than half way it drops like my foot isn't even on the gas. I don't have o2 sensors in it but I feel as tho o2 sensors won't make my car shut off randomly and won't make my car jump and jolt and not change gears.some one please help me...
I had the same issue with the gas pedal thing (if you're not like 70% throttle to floored, the car basically just drops like you're not even on the gas). If this would happen I would unplug the battery and hook it back up and it would temporarily fix it. It would eventually come back at some random time though. After replacing tons of parts with no success whatsoever, and a whole bunch of testing, we said screw it and (even though it didn't make sense) we replaced the throttle cable with a brand new OEM one from the dealership. To our prevail, It's been a year and a half and the issue never came back. Don't ask me why or how it worked, cause I have no clue lmao. Maybe this will fix your issue, I'd say its worth a shot since they're very cheap and easy to install.
 

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Discussion Starter #9
So I replaced the speed sensor and put on two o2 sensors and still nothing. Now when I start the car up it goes from first then revs really high then goes into 3rd and stays. I tried the battery thing and it worked for a little but came back. I'll check out the throttle cable but I can floor it with no problem it like fixed it self some how idk what's going on with it. But it won't go out of 3rd still. It'll still let me put it into second manually. My mechanic here is help but very little. I'm going to check out the throttle cable but idk I'm so over pumping money into this
 

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Does your speedometer operate normally?
Is the car jumping / jolting because of the engine or transmission?
Do you have access to a scan tool that can communicate with the transmission?
Any TDCs for the engine / transmission?
Does it shift harshly or slowly when it does shift?
Is the transmission fluid at the proper level?
Is the transmission fluid dark or smell burned?

My current best guess is either a problem with the input or output speed sensor or a rub-through on the transmission harness. it might help to film the problem if you can safely drive the car and demonstrate the fault.

Edit: I also found this in the workshop manual (on this forum) that might put more suspicion on the speed sensors
 

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Discussion Starter #11
WTF? You bought it in the US of A and it had no O2 sensors? Do you have any kind of history on the vehicle? How many miles? What year? If the car has no O2 sensors you should be in limp mode and not be able to rev past 3k rpm. The ECU's going to be all kinds of pissed off.
So my tibbys been a whole lot of work. I've replaced the tps sway bars rotors breaks oil spark plugs coil pack for 1and4 the negative connection to the battery battery fuse and my cars still running so weird. I've taken it to two separate places and had multiple mechs look at it and still they don't know what's going on. I've had hesitation problems for a long time. Thought maybe replaced the tps and my air filter and cleaning my maf and other sensors would help... No it did nothing. It's just now my car randomly won't let me go back into 1st or up to 4th. It doesn't down shift automatically when in drive. Recently I've been trying to do some tests with it and if I have the gas pedal half way down it accelerates but if I push it more than half way it drops like my foot isn't even on the gas. I don't have o2 sensors in it but I feel as tho o2 sensors won't make my car shut off randomly and won't make my car jump and jolt and not change gears.some one please help me...


Fixed it. Changed the input and output transmission sensors
 
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