car hesitation around 40 mph

x2 on the fuel system. Mechanics computer says one of my engine coils needed to change and so I changed all of them. Yes my question was about testing the oxygen sensor, it is a 4 wires type (2 black, 1 blue, 1 white), it would be great if you can post it, About the other trac code error 47, it was a little adjustment that needed to be done to the traction control sensor position and the code now is cleared. The mass airflow sensor, also known as the MAF sensor, is connected to the air cleaner. I have to shut off the engine in neutral and start again for it to move for a while and the same cycle happens again. cant maintain a speed over 50 . This started around may 2012 with 99,000 miles on the car. ALREADY CLEANED INJECTORS AND CHANGED EGR GASKET. Any ideas what it could be or where to . Today, I will be better than I was Yesterday, but not as good as Tomorrow! This may be a sign of a dirty or failing mass air flow sensor. As the car approaches 40 mph, the RPMs will increase in the engine. How to fix it. This did not fix the problem, just made it worse when driving. Hesitation (Misfire) When Cruising At 40 To 60 Mph If yes, what happens at 40 to 45 mph ( with light throttle) is your car is going into 4th gear. The children are from the small town of Bad Arolsen in the central German state of Hesse, and are reportedly in the 10th grade, meaning they are aged 16 and 17. Only to find out that it was my EGR 1) Bad Throttle Position Sensor The throttle position sensor monitors the throttle valve's position and then relays this information to the engine control unit. Help Car sputters/bucks around 40-45 mph. - Focus Fanatics Forum It has been a work in progress, and around April I finally got it running after rebuilding the carb. There are a range of reasons why your car is juddering when you accelerate. Red, Gozzard Fiberglass tub. Aug 22, 2018. I have changed the TPS, coil, coil igniter/module, plugs, cap, wires, rotor. Camera Tripod: https://amzn.to/2Jwog8S6. What is interesting about the problem is that it only occurs as follows: driving at around about 60 miles an hour and slowly accelerating. I unhooked the old filter and I could not believe the junk that came out of it. Shudder or Vibration While Driving at Speeds Between 35 and 40 MPH on Acura MDX Problem Description A shudder or vibration may develop while driving at speeds between 35 and 40 MPH. It is a 350 it did over heat but head gasket good no water in oil or over heating . totally fine. Problem is more noticeable on hills/slops. Flat rate pricing based on labor time and parts, Hand-picked, community-rated professionals, Trusted mechanics, rated by thousands of happy car Car is seemed to go from constant to intermittent. How to fix engine hesitation during acceleration. It seems more Torque converter lock than loading. I checked the PCV and it was okay so I reinstalled it. Ive been lurking this forum for a while and tried to read every forum post related to this problem Im having.

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