Not sure its the transmission, opinions?

[AccordUser]

So, I the last couple of years I have had the po420 code. I know what it means and have replace a cat, both 02 sensors, clean IM, TB, and EGR, and just replaced the pcv. i dont live in a place that requires emissions, thats why im not so worried about it. as for the issue, it doesnt seem to discriminate whether the engine is cold or warm. when i start it up, and take off between 15-20mph, it will all of a sudden stop accelerating , I can rev it up but wont gain speed. BUT if i remove my foot from the gas and wait half a second it will go "into gear" not sure if its even switching gears, reason being if i reset my ecu, this whole issue goes away and wont happen again for another 50 miles of driving or so. IT ONLY HAPPENS WHEN I START MY CAR AND DRIVE IT INITIALLY, NOT WHEN I JUST START IT AND STOP AND GO IN TRAFFIC DAILY. Any suggestions. I know i read a while back it might have been my torque converter but if that was the case, it should keep happening immediately after i reset my ecu.....no codes come up for this, only my po420 code. idk, help me!!!1

 

[cirsurvive711]

sounds like your car goes into "limp mode". have you checked your oil lately?

 

[Chris Vu]

That doesn't sound like limp mode to me ..

 

[jeffpanya]

i have this stupid code too, i have a gutted cat so really can't get rid of it, my car doesnt go into vtec i dont even hear it crossover anymore either, lol

 

[AccordUser]

I change my oil pretty religiously. Last change was less than 400 miles ago....not sure if mine will go into vtec, don't wanna try and have somethin bad happen....any ideas guys? I don't wanna keep resetting the ecu just so it drive correctly

 

[AccordUser]

Just tested it, couldnt help myself, and ooo yea, vtec is still there

 

[10secvtec]

So, I the last couple of years I have had the po420 code. I know what it means and have replace a cat, both 02 sensors, clean IM, TB, and EGR, and just replaced the pcv. i dont live in a place that requires emissions, thats why im not so worried about it. as for the issue, it doesnt seem to discriminate whether the engine is cold or warm. when i start it up, and take off between 15-20mph, it will all of a sudden stop accelerating , I can rev it up but wont gain speed. BUT if i remove my foot from the gas and wait half a second it will go "into gear" not sure if its even switching gears, reason being if i reset my ecu, this whole issue goes away and wont happen again for another 50 miles of driving or so. IT ONLY HAPPENS WHEN I START MY CAR AND DRIVE IT INITIALLY, NOT WHEN I JUST START IT AND STOP AND GO IN TRAFFIC DAILY. Any suggestions. I know i read a while back it might have been my torque converter but if that was the case, it should keep happening immediately after i reset my ecu.....no codes come up for this, only my po420 code. idk, help me!!!1

maybe it could be the tranny sensors? happen to me once theres four i think.

 

[10secvtec]

awww that sucks bro. it doesnt purr nomore.

 

[Snoobly]

maybe it could be the tranny sensors? happen to me once theres four i think.

Yes, sounds like your sensors. I agree, i believe there is one for each gear. It's been awhile since i researched autotragics though, so double check that. Does it jump in all the gears? or just first or first into second?