Car shakes after starting up.

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Greg Rozelle - 16 Sep 2007 01:53 GMT

Car shakes after starting up.
I have a 1993 Altima Gxe

Car shakes after starting up. I did an oil change on 9-14-07
Then I filled up gas on Saturday 9-15-07.

The shaking started after I filled the gas up.

The Oil change place I took it took does have some bad reports online.
This particular place has a trust worthy mechanic and is high
respectably in this community. This person would go out of they way
to help you. He was there at the time of the oil change, No oil
leak.

It shakes real bad.
What is odd about the shaking? It seems to be worse under 30 miles
and hour. Less shaking above the 30 mph. I noticed it shakes a lot
worse with the overdrive on. I had to turn it off. To even go.

I took it back to the place. He told me I could of got air or bad gas
in the tank. He told me to drive it awhile and it could clear up.

My questions.
Should I drive it until I get the gas when it gets down to 1/2 tank or
even 3/4 of a tank? Then add gas. I got the gas at Sunoco 91 grade.
Which usually does great.

Should I add a gas treatment to Nissan.? What brand should I use?
The last time I did a treatment. I had to replace a distributor cap.
It is a fuel injection engine

Should I take it to a shop or is there another cause?
Spark plugs and wires look ok.

Thank You,

Greg Rozelle
P.S. I know there is a debate with leaving the overdrive on or off or
only turn it on at a certain speed.

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al - 17 Sep 2007 04:36 GMT

> Car shakes after starting up.
> I have a 1993 Altima Gxe
[quoted text clipped - 37 lines]
>
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First, does it shake when the car is stopped and the engine is
idling? If yes, then it's an engine problem. If it shakes only when
driving, then it is likely a drivetrain problem. If it's an engine
problem, has it lost power? If it has lost power, is the loss of
power worse under load? If so, the ignition system needs to be
checked (distibutor cap, rotor, wires, spark plugs etc.). The oil
change and gas may simply be coincidental and have nothing to do with
the problem. Do some logical diagnosis first. It will point you to a
cause which will imply a fix. It's better than stabbing in the dark.
Good luck. Al

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Bajori - 17 Sep 2007 14:04 GMT

>> Car shakes after starting up.
>> I have a 1993 Altima Gxe
[quoted text clipped - 49 lines]
> cause which will imply a fix. It's better than stabbing in the dark.
> Good luck. Al

Don't discount smaller problems either. Even a broken motor mount will cause
the type of shaking you describe. Start with the smaller possibilities
first, then go up from their. I have found that most technician's are quick
to agree with you if you believe a large repair is the order of the day.

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