QuestionQUESTION: I fixed my sentra GSE 1.8 2000 from code 174 and I change the MAF at the dealer but after that the car still shaking and the power is not 100%, it's normal when I reach 70 MPH but below that it's like dying and shaking specially on the hills.
I change 2 of the fuel injector and it helps a little bit.
No check engine light for now.
The MPG went down from 32 to 26mpg.
I did the 30K service recently and the mileage now is 120K.
Please help.
Thank you in advance for your help.
Mendi
ANSWER: Mendi,
Replace the oxygen sensors and reset the comuter by disconnecting the battery for five minutes. It worked for my on my Maxima with 139,000 miles and mine was doing the same thing yours was.
---------- FOLLOW-UP ----------
QUESTION: Hi I spend $500 to change the O2 sensor and unplug the battery but no help.
Do you have any other idea why the car still no power and shaking?
And no Check engine light
Thanks
AnswerMendi,
Check the fuel pressure since you have replaced the oxygen sensors and there is no change I would look at possibly a leaky injector since you have replaced two. Do first a system pressure test and then a leakdown test to see if the pressure drops off suddenly. Also, check the plugs to see if any are really black which will let you know which injectors are leaking.
