I have changed all of those things and I still have my check engine lite on. Once you have installed the intake back onto the car, start the engine and spray some carbueretor cleaner around where the intake manifold is. Also, you can watch the engine load under wide open throttle as it should go about 85 or 90%. Small cracks in this hose let additional air into manifold. This device is located between the air filter box and the intake manifold.
I am looking for a new mechanic! Thank you so much again!!!!!!!!!!!!!! I sure wish smart phones existed when I first started in this business, they have made my life so much easier! YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. The first two miles of driving had very rough idling, but it seemed to ease up. Check that sensor is latest part. I finally decided to replace the intake manifold gasket with the upgraded orange version. The guy said I needed to replace a sensor. She doesn't drive too fast or hard. High positive numbers at idle and normal numbers while accelerating indicates a vacuum leak.
The readings were not consistent all the time between the sensors. My car is running much better now. Check your ar filter and how it fits the air box. They updated the intake manifold gasket: Above: updated intake manifold gasket You can differentiate the old gasket from the new by the color — the original gasket was black, the new is orange. I have a matrix with the same motor so I switched the sensors and nothing. If you changed the spark plugs but did not change the battery, that could be the culprit. This kept the air filter from sitting down in the groove properly.
The vacuum leak caused by the hose not plugging up that nipple in the intake manifold is what's causing the rough running. Once you have all the bolts removed, you shouldn't have to fight it out, the manifold should easily pull right out. In case the amount of the compensation value is extremely large The actual mixture ratio is too lean. Sometimes the mass air flow sensor just gets dirty and gives false air flow readings causing the engine to run lean. Thank you so much mechanic254. Top of the manifold was stuck with the wires on the top side.
He didn't say anything other than what the posts are saying here except something about a large hole. I would like to see what other people think about this. The gas cap was fine so I took my 2000 4 runner into the shop. It was funny that the car's O2 readings didn't fluctuate while accelerating or decelerating when we did the test. Am I hurting the car in anyway by doing this? They suggest you run the tank of fuel and cleaner within a week or it will eat fuel lines. When testing the fuel pressure on this engine, the specifications are 44.
The cause of this trouble code will likely be discovered during one of these two tests. There were 3 rubber hoses. Saturday morning he started it up and sure enough my intake manifold was leaking. But, your short term trims seem to be countering your long terms for a total correction of about 10 which isn't too bad for an old car. Dude, you need more tools.
I went by PepBoys and the guy said I needed to replace both sensors. There is no check in light. When it cant adjust anymore it trips the po171 code. As you will see, the dealership made a number of attempts to repair the problem. The throttle body gasket was compressed but could probably have been reused; however, for just a few bucks, I don't have to worry about it in the future. My check engine light illuminated about 2 weeks ago when my wife was driving home from work around 20min travel time.
Now about 7 weeks ago it started to get cold and my car started to idle high and soon after the light came back on. Bank 2 is simply the other bank. The gasket fix will def solve horrible gas mileage issues, and the check engine light. If fuel trim is normal, 2-5 then its the O2 sensor. Look on bottom section of the intake manifold at the back of engine where tranny bolts up you should see the vacuum motors there on the intake,these are the control motors for the intake manifold runners.
We were having a winter heat wave the last few weeks since my light came on. I had my check engine light come on and took it to AutoZone. Thanks very much for this writeup! I know there's listening to the engine idle or something but I'm not sure what I'm listening to and what the problem is. I feel so bad now. Or, you could just use a cheater bar.
But anyway a little patience and jiggering and it was easy enough. I would replace it even if he can not tell if it's bad. Thank you very much for this guide. Everything seems to be all right now. There also could be some other reasons, but the air flow sensor and vacuum leaks are the most common.