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Hi all,

I have an intermitent "bucking" problem with my 05 Titan.

The truck randomly bucks when it snows outside and I'm driving. It's as the wheels lock for a fraction of a second. Seems to only hapen when there is wind gusts and snow.

Also when I first start it in the morning and it has been snowing overnight with wind gusts the engine rev fine at first but then start stumbling as if it where missing fuel or air. It even stalls sometime but I've always been able to start it back giving it a little throtlle.

Has anybody ever experienced this kind of issues? Any help would be apreciated.

Thanks,
 

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ABLS will kick in if the tires lose traction going forward. This will do two things, apply brakes to the wheel that is slipping and reduce the engine RPM. Is that what your bucking problem could be? The "Slip" light should come on when that happens.
 

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Hi all,

Also when I first start it in the morning and it has been snowing overnight with wind gusts the engine rev fine at first but then start stumbling as if it where missing fuel or air. It even stalls sometime but I've always been able to start it back giving it a little throtlle.

Has anybody ever experienced this kind of issues? Any help would be apreciated.

Thanks,
This happened to my old truck last winter, had an overnight storm and I parked it at the hospital across the street. I thought it was "choked" by the high winds, snow and ice...can't for the life of me remember what it was, I've fixed so many things on it. To me it seemed like a fuel or air problem. I've since replaced the starter and battery and no issues, but that was later. Wish I could remember lol
 

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Has anyone figured out the answer to this problem? I've been having this problem for two years now and I've brought my car to 4 mechanics and 2 Nissan service centers. They've all told me the transmission, tires, driveshaft, engine is all fine, nothing seems to be broken. Please help!
 

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I'm sure you've done this, but just to make sure, have you swapped out wires and plugs? Not sure how many miles are on the truck, but if the wires have any cracks in the insulation, the cold and wet weather generally make them more susceptible to arcing which would cause the engine to buck or just not run good. Also, a new set of plugs can do wonders to an engine.
 

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I finally figured it out!! My car was in the shop yesterday getting a final diagnostic for the problem because mechanic was trying to reproduce the problem in the snow and it was snowing yesterday. He reproduced the problem but could not tell me why it was happening. He said it was probably transmission related and to take it to the dealership. Except, I brought it to two different Nissan dealerships and they did a full transmission diagnostic with no problems found.

I lost hope until I did some googling and other people who had the same problem replaced their air filters! Air filters not seated properly or defective ones allows snow, dirt, debris, etc... to pass through and hit the MAF sensor which sent a current spike to the ECU which made it think it sucked in a huge amount of air which would cause the engine to compensate and by giving less fuel and then end up with a misfire but no code because it was compensating for the "amount of air" which was actually a snow flake.

I decided to try it and IT WORKED!!!! WHOOHOOOO!!! When I took out my old air filter, it turns out it had a faulty seal (seals were worn and destroyed) which caused the snowflakes to enter whenever it snowed! My car drove like a beast last night in the snow and no bucking of the engine yet! Luckily, it snowed enough last night and the road conditions would have definitely caused the engine bucking but it didn't after replacement! So, I'm confident it's fixed. It's only taken me two years to figure out what's going on with this problem.
 

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When I took out my old air filter, it turns out it had a faulty seal (seals were worn and destroyed) which caused the snowflakes to enter whenever it snowed! My car drove like a beast last night in the snow and no bucking of the engine yet! Luckily, it snowed enough last night and the road conditions would have definitely caused the engine bucking but it didn't after replacement! So, I'm confident it's fixed. It's only taken me two years to figure out what's going on with this problem.
I have a Cobalt that does this exact thing, but only when it snows ...like when it really blows around say between -10C and -5C. I had looked over and cleaned the MAF but what was not making any sense why it happened when it snowed. Cold alone would not trigger.

This bucking would really scare you especially on slippery surfaces. I will look at lot closer at the filter housing as #1 I believe one hinge is sort of cracked which may or may not be affecting seal. The filter seemed ok but who knows perhaps some snow is somehow working past. I am debating putting screen in there!! I am running a used MAF but the original did the same.
 
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