Hot answers tagged

8

Spark? looks good enough to me. Jumps a 30kV gap looks blue enough to rule out a secondary issue. Great. MAP sensor voltage looks OK < .90v with the engine hot @ idle. Pretty much rules out a sticking valve or the valves being out of adjustment. Concur, and just about rules out engine pumping problems. That and the good compression test. Fuel trims ...


4

Those are misfire codes. You've likely got a problem with either the ignition or fuel delivery systems (or both). I would venture to propose that if you "know little about cars" then you are not equipped to diagnose issues with the coils, spark plugs, ignition wires, injectors, etc. Although I would not usually propose throwing parts at a problem without ...


3

Here are some of the translations for your errors by code P0300 - This random multiple misfires on random cylinders P0301 - Cylinder 1 misfire. You could have a bad spark plug, a bad spark plug wire, a bad coil for cylinder 1, a bad wire to the coil for cylinder 1, an open in your wire harness for cylinder 1. In conjunction with your above error I would ...


3

P0300 is the trouble code for random/multiple misfires. P0302 is the trouble code for misfires in cylinder #2. Common causes for misfires are : Bad spark plugs. Remove them and inspect them. Replace them if necessary ($20 if you do it yourself). Tools needed: ratchet with various size sockets, spark plug socket, ratchet extension, spark plug gapper tool. ...


2

If I am correct, the CMP signal is generated by the ICM, the engine doesn't actually have a cam position sensor. The ICM monitors the difference in voltages on the HT coils to work out which cylinders are on the compression cycle. This will explain why the CMP and CKP signals are shifting relative to each other. The synthesised CMP signal is sent to the ...


2

You need to check your fuel pressure while the engine is under load to ensure it's correct. Should be ~58psi on an LSx engine when functioning correctly. The P0300 when not pointed at a specific cylinder is indicative of a misfire due to lean condition while under load. What it sounds like is, your pump isn't keeping up at speed or possibly you need to ...


2

I second checking valve adjustment. Also, how do your plugs look? We have been replacing pistons & rings under an extended warranty at the dealer for oil consumption issues with many of the 2.4L engines (Accord, CRV, Crosstour). If your car is consuming large amounts of oil between changes it may be something to consider.


1

From the comments: "After trying (and failing) on multiple occasions to reattach the fuel gauge, I gave in to my gf and took it to my friend's mechanic. After giving him the low-down, he test drove on the highway and saw the multiple misfires (mostly on 5 and 6, but some on 8 as well). Interestingly, he mentioned that he didn't feel them though. He ...


1

As stated in the other answer, the most likely cause is spark plugs ($15-$20 for a full set) or coils (about $20 each). A repair manual (Haynes or Chilton) that is specific to your vehicle will cost about $20-$30 and will tell you not only how to do this, but many other repair tasks that you are getting raped for at a mechanic shop, like changing the bulbs ...


1

Ok guys I got the same problem with a 08 honda accord 4 cylinder I work as a mechanic in L.A. this is what I did the car was brought in with misfire problem on cylinder # 2 and 3 plus p0339 the consumer had change the crank sensor but still same problem so when the car got here I erase all codes and when for road test at soon i went around the ...


Only top voted, non community-wiki answers of a minimum length are eligible