Would car running lean delay trans shifting?
Would car running lean delay trans shifting?
I need help very bad. My wife has been driving my car for the past month. The check engine light came on and i had it checked at autozone. It said that I need one of the front o2 sensors and that the left bank was running lean. I finally drove the car a week later and the trans does not shift on time. The rpms go very high then it shifts. Would the car running lean cause this or should I go looking for a shop to rebuild my trans.
Joined: Oct 2005
Posts: 4,572
From: Middleboro/Carver, Ma
It's not uncommon for shifting problems to be misdiagnosed as trannsmission problems when they are not, last post could very well be a perfect example. A large loss of power will cause an auto trans car to shift erraticly. You need to replace the o2 sensor in question and see if you are still getting a lean condition, then start with changing the trans fluid (I'm assuming you already checked the fluid) and after that having a reputable tranny shop check for proper line pressure etc. Is it late to shift and you need to really force it to upshift by letting off the throttle as much as possible? Also, posting the mileage on your car is key
Originally Posted by KRRZ350
It's not uncommon for shifting problems to be misdiagnosed as trannsmission problems when they are not, last post could very well be a perfect example. A large loss of power will cause an auto trans car to shift erraticly. You need to replace the o2 sensor in question and see if you are still getting a lean condition, then start with changing the trans fluid (I'm assuming you already checked the fluid) and after that having a reputable tranny shop check for proper line pressure etc. Is it late to shift and you need to really force it to upshift by letting off the throttle as much as possible? Also, posting the mileage on your car is key
Joined: Oct 2005
Posts: 4,572
From: Middleboro/Carver, Ma
yeah I thought that's what it sounded like, that's usually an indication that the 'brake-bands' inside the trans are very worn, mileage is high also, however if it is doing it in all gears it could be a simpler hydraulics problem inside trans, either way do excctly what your planning, change o2 sensor and if problem persists find a good tranny shop, good idea might be to call all of them up and describe car and problem and ask them how much to do a 'line pressure test' find the one that gives the answer that sounds the most knowledgable. Sorry your thread got overtaken here also, this is NOT like the .org and they WILL be banned, hopefully for a long time, glad you caught my post and didn't get discouraged, absolutely ridiculous, I've reported both of there posts
Joined: Oct 2005
Posts: 4,572
From: Middleboro/Carver, Ma
oh, forgot to add, the trans computer gives trouble codes also that can be accessed via the o/d light, they will give fault codes for many hydraulic control problems, however I've never been able to read one, they flash so damn fast and are very hard to read
Originally Posted by KRRZ350
yeah I thought that's what it sounded like, that's usually an indication that the 'brake-bands' inside the trans are very worn, mileage is high also, however if it is doing it in all gears it could be a simpler hydraulics problem inside trans, either way do excctly what your planning, change o2 sensor and if problem persists find a good tranny shop, good idea might be to call all of them up and describe car and problem and ask them how much to do a 'line pressure test' find the one that gives the answer that sounds the most knowledgable. Sorry your thread got overtaken here also, this is NOT like the .org and they WILL be banned, hopefully for a long time, glad you caught my post and didn't get discouraged, absolutely ridiculous, I've reported both of there posts
Originally Posted by Grand_hustle17
i heard you had a huge L after racing astock mercury this past saturday

Check this link for reference re: tranny codes.
http://forums.maxima.org/showpost.ph...23&postcount=8
Originally Posted by NmexMAX
Mercury Mark VII vs DE w/ 00VI.


Joined: Oct 2005
Posts: 4,572
From: Middleboro/Carver, Ma
hey that's cool, was that your dyno chart? I'm actually building a 700hp blown mark8 motor, well '96 cobra motor, same thing except forged crank, different cams, upper-intake. That's cool though, I swear just the other day I was saying to myself "I wonder at what rpm's the additional high-rpm ports open up". looks like 3250, never thought I'd find that out on the .org........
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