5.5 Gen Changed Plugs and Now Transmission not downshifting on time?
#1
5.5 Gen Changed Plugs and Now Transmission not downshifting on time?
The title pretty much sums up what I am experiencing but here is more detail.
I changed my plugs on my 02 GLE Auto at 60k with some NGK iridiums about 2 weeks ago. After everything was installed I got a CEL code for the Ethrottle, which I expected due to it being unplugged. So I read in the FSM that anytime this happens you need to do the relearn procedures for the Throttle Closed etc. and Idle Air Learn and I have done all 3 and the codes are gone and haven't come back and I also reset the ECU for good measure.
Anyhow for some reason I am now getting a strange resistance for the transmission to downshift to 1st when coming to a complete stop. Its like I get a lot of Engine Braking from 10mph to 0 and you can feel each gear change from, 4th to 3rd and then to 2nd and then to 1st. The downshifting of the tranny was definitely smoother when coming to a stop prior to all this and its getting on my nerves and I have no idea what is happening. I don't have any Codes at all and it drives perfectly other than this.
Any Ideas? Thanks.
I changed my plugs on my 02 GLE Auto at 60k with some NGK iridiums about 2 weeks ago. After everything was installed I got a CEL code for the Ethrottle, which I expected due to it being unplugged. So I read in the FSM that anytime this happens you need to do the relearn procedures for the Throttle Closed etc. and Idle Air Learn and I have done all 3 and the codes are gone and haven't come back and I also reset the ECU for good measure.
Anyhow for some reason I am now getting a strange resistance for the transmission to downshift to 1st when coming to a complete stop. Its like I get a lot of Engine Braking from 10mph to 0 and you can feel each gear change from, 4th to 3rd and then to 2nd and then to 1st. The downshifting of the tranny was definitely smoother when coming to a stop prior to all this and its getting on my nerves and I have no idea what is happening. I don't have any Codes at all and it drives perfectly other than this.
Any Ideas? Thanks.
#3
What RPM is your cars idle at? When I took off my intake to change my plugs I cleaned and evidently screwed up my throttle body which led me to have a high idle. I was idling around 950 RPM and I felt what you are describing when coming to a stop. I eventually got a high idle error code.
#4
Yeah, my idle was high ~900 like you mention, right after as well and my error code showed up almost instantly. I cleared that code by resetting the ecu and after 500 miles and 3 weeks of driving it has not returned. Also as I mentioned I did the 3 different idle reset/air learning procedures and they seemed to take.
I don't understand why this is happening as the car runs excellent, power is good, throttle response is pretty good for our crappy auto tranny. I asked a Nissan Tech guy I know to see if he will run the consultII on it when he gets a chance and see if there is anything out of spec. I gave him my symptoms and he couldn't think of anything off the top of his head.
All I can think is maybe the lock-up portion of the converter isn't disengaging, maybe due to a slightly Off signal from the TPS even after the reset, as it also seems to be the worst when coming all the way from 4th to 1st at a complete stop. I have noticed some slight 4th gear highway speed engine braking that wasn't noticeable before.
I don't understand why this is happening as the car runs excellent, power is good, throttle response is pretty good for our crappy auto tranny. I asked a Nissan Tech guy I know to see if he will run the consultII on it when he gets a chance and see if there is anything out of spec. I gave him my symptoms and he couldn't think of anything off the top of his head.
All I can think is maybe the lock-up portion of the converter isn't disengaging, maybe due to a slightly Off signal from the TPS even after the reset, as it also seems to be the worst when coming all the way from 4th to 1st at a complete stop. I have noticed some slight 4th gear highway speed engine braking that wasn't noticeable before.
#7
#8
Originally Posted by P. Samson
I would try redoing all three relearns in order again, although I think it is the Throttle Closed Pos. Sw. Learn that is the problem.
THANKS For the Good Advice.
#9
i know this has nothing to do with this but i cant post a thread so i wanna know if a 2000 maxima se fully loaded manual with 130k is worth buying for $7000 its dark gray gray interior bose climate control heated seats tints and smoked head light and fog lights
is it worth it or no
is it worth it or no
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