Automatic Downshifting.......?

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Meaux
Posts: 357
Joined: Fri Dec 24, 2004 7:03 am
Car: 94Q45, 92Porsche 968, 72Porsche 911, 89Maxima SE, 98Honda Civic, 85F150 w/95 5.0

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94 Q45......78Kmi......cleaned MAF, and Throttle body....

Now that I've reset my TPS back to it's orginal position and my idle is back to normal, I'm back to the original problem which is:

#1- Accelerating from a complete stop, the car starts rolling and then seems to stumble. I have to press on the accelerator more to get the car to move, then it takes off....

#2- When coasting from 50mph down to 25mph, tha automatic dosen't downshift to 2nd or 3rd, I almost have to press the accelerator to the floor to get it to downshift.

Gas mileage really stinks since this started happening......I know lugging this thing around isn't doing the automatic any good......

Speed Sensor? I don't have an FSM so I'm just guessing.

Should have a new computer next week so I'll be able to download and unzip a FSM.

Thanks.............


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elwesso
Posts: 30810
Joined: Sun Feb 23, 2003 4:52 pm
Car: 94 Infiniti Q45t 5 spd
2007 BMW M Coupe
2007 Infiniti G35 S 6MT
Location: Indiana
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dont rule out your MAF!!!!!

Only real way is to check it by swapping in a known good one.....

1. Sounds like your Q needs some help, MAF could do it, ubt if its hot out with the AC on and the KS are bad, thats another thought2. Thats normal. You should have to press it most the way to downshift to 3rd and then pretty much all the way to go to 2nd... Thats why theres that little clicky thing at the bottom of the pedal. I like it SOO MUCH better than other cars, because on ALL other cars I have driven, you just keep giving it a little throttle and then BAM, it downshifts. Not good for smoothness...



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