My Engine is Misfiring?

Tiny
CWHITE101
  • MEMBER
  • 2002 NISSAN ALTIMA
  • 3.5L
  • 6 CYL
  • AUTOMATIC
Hi I am Christina my cylinder #3 on my 2002 Nissan Altima is misfiring. I been reading a lot of things online and the talk of head gasket keeps coming up. My mechanic told me it's not the head gasket because it's NOT over heating (but I did have some overheating problem before because of a cracked radiator but I have a new radiator now). Is it possible that from the previous overheating it could've blown the head gasket even though its not overheating anymore since I replaced the radiator or is safe to say I just will need to replace the #3 coil pack? HELP PLEASE!
Sunday, February 2nd, 2014 AT 11:36 AM

39 Replies

Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
Has it been missing every since the cracked radiator was replaced? or is this a new problem? how long has it been since the radiator replacement and when the misfire started happening? this guide can help us fix it:

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Please run down this guide and report back.
Was this
answer
helpful?
Yes
No
+1
Thursday, January 21st, 2021 AT 10:48 AM
Tiny
CWHITE101
  • MEMBER
  • 4 POSTS
It started missing the night before I got the radiator put in.
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:48 AM
Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
Ok, the only way to be sure is to have a leak down test or combustion gas test performed to verify whether or not you have a heat gasket issue. That is where you need to start before you waste any money on the car. Does the car have good heat? If so does is suddenly go cold sometimes? Any white smoke? Or antifreeze smell?
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:48 AM
Tiny
CWHITE101
  • MEMBER
  • 4 POSTS
Ok I will definitely do that. The heat is okay it doesn't get hot like most cars but it gets pretty warm. It doesn't suddenly go cold and sometimes I see smoke come from under the hood when I'm driving it long distance or when I'm getting off the highway.
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:48 AM
Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
Yeah, I would definitely get the leak down/combustion gases test done. If that is negative, which is a good thing then I would have it pressure tested one more time. I hope I have been of some help to you and please let me know how it works out. Have a great day.
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:48 AM
Tiny
CWHITE101
  • MEMBER
  • 4 POSTS
Thank you so much it was a bad injector#3 I got a new one the car runs great!
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:48 AM
Tiny
HOMER1967
  • MECHANIC
  • 875 POSTS
You are welcome.
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:48 AM
Tiny
CLOROX.BLEACH
  • MEMBER
  • 17 POSTS
  • 2002 NISSAN ALTIMA
  • 195,000 MILES
I am having quite a few problems with my Altima. I think I will start from the beginning. The problems starting happening when the car was hard to start. It wouldn't crank unless you was pumping the gas pedal. The SES light was on. At that time, it was pulling the codes for the crankshaft positioning sensor, O2 Sensors, engine too lean, and speed sensors. I had all of them replaced. A few days later my SES light came back on. Around this same time, I begin getting a******** sensation when I'm driving and let off the gas pedal. I took the car to AutoZone and they scanned the codes again and now its pulling the codes P1574 Speed Sensor, P0128 Temp Sensor, and P0171 Engine to lean bank 1. I would like to know hwat could be causing the******** sensation that I am having, and what are the conquences of driving a car that has a lean running engine. Also, I forgot to mention, when I press the gas while the car is idling, it feels like something other than smoke is being pushed out the tailpipe. When I look behind the car, there is a black liquid coming out of the tailpipe. It is cold these days so I dont run the AC so im sure it cant be water. PLease help me with this issue. Thanks.
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:52 AM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
First of all, what are the odds that all those sensors failed at the same time? Nill. Codes never identify bad parts, just failed systems.

The crank sensor is a common failure and there is a tsb on it from nissan. There is an updated flash as well for this issue which would solve most of your problems.
The 171 code is not an o2 sensor, it most likely is a vacuum leak somewhere and can be verified by a smoke test on the intake system.

I would have a shop check this for you as throwing parts at it has not fixed your car. The repairs will probably be narrowed around 1 system.

Roy
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:52 AM (Merged)
Tiny
CLOROX.BLEACH
  • MEMBER
  • 17 POSTS
Ok thanks. But what could result in driving the car while it stating that it is in a lean running situation? The shop and everything that I need to fix the problem, as well as the Nissan dealership, is in the next city over about a good 35 miles away. I don't want to put further harm on the engine if any from driving it lean.
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:52 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
After replacement of the sensors, were the trouble codes erased?

Lean running conditions for one bank cna mean a skipped cam timing or clogged fuel rail, vacuum lekages and many more.

Clear the codes and run engine before rechecking the codes again and see which comes up first.
Was this
answer
helpful?
Yes
No
+1
Thursday, January 21st, 2021 AT 10:52 AM (Merged)
Tiny
CLOROX.BLEACH
  • MEMBER
  • 17 POSTS
I have erased the trouble codes several times after the sensor replacement. But when I turn my car on and let it idle, the SES light comes back on giving me the codes for a speed sensor (which was replaced) and a temp sensor ( this code is new). Then after a few hours of driving the car, the engine too lean bank 1 code shows up again.
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:52 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
What were the EXACT trouble codes retrieved?

Have a compression test performed to see if they are within specs.
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:52 AM (Merged)
Tiny
CLOROX.BLEACH
  • MEMBER
  • 17 POSTS
P1574, P0128, P0171 are the trouble codes. Also, just starting today, when the car was idling, the rpms got down to about 500 then eventually acted like it wanted to shut off, but didnt. When I shifted to reverse with my foot on the brake, the rpms got even lower to about 250ish and the engine started knocking but didn't cut off, but the car drives normal except for the******** I get when I let off the gas pedal.
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:52 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Let start with the P1574 and P0128 since they are the ones that came on first.

DTC P1574: ASCD VEHICLE SPEED SENSOR

Description

ECM receives vehicle speed signals via 2 different lines, and detects vehicle speed for ASCD control. Vehicle speed signals are input from instrument cluster and Transmission Control Module (TCM) separately. Signal from TCM is via CAN communication line.

Possible Causes

Malfunction is detected when ECM detects a difference in values between the 2 vehicle speed signals. Possible causes are:

CAN communication line open or shorted.

Instrument cluster circuit open or shorted.

Defective instrument cluster.

Defective vehicle speed sensor.

Defective TCM.

Defective ECM.

DTC Confirmation Test

Start engine. Ensure TCS is turned off. Select DATA MONITOR mode with scan tool. Drive vehicle at more than 25 MPH. If 1st trip DTC is detected, go to DIAGNOSTIC PROCEDURE. If 1st trip DTC is not detected, system is okay at this time.

Diagnostic Procedure

1. Check for A/T system DTCs. If problem is found, diagnose A/T system. If problem is not found, go to next step.

2. Check VSS, VSS circuit and instrument cluster. Repair as necessary.

DTC P0128: THERMOSTAT FUNCTION

Possible Causes

Malfunction is detected when engine coolant temperature has not risen enough to open thermostat even though engine has run long enough. Possible causes are:

Thermostat stuck open.

Leakage from sealing portion of thermostat.

Defective ECT sensor.

DTC Confirmation Test

1. Replace thermostat with an OEM replacement. Turn ignition on. Select COOLAN TEMP/S in DATA MONITOR mode with scan tool. If COOLAN
TEMP/S is less than 140°F (60°C), go to next step. If COOLAN TEMP/S is not less than 140°F (60°C), allow engine to cool.

2. Drive vehicle at a speed of 50-75 MPH for 10 consecutive minutes. If 1st trip DTC is detected, go to DIAGNOSTIC PROCEDURE. If 1st trip DTC is not detected, system is okay at this time.

Diagnostic Procedure

Remove ECT sensor, and place in heated water. Measure resistance between sensor terminals, with water at specified temperatures.
See ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE table. If resistance is as specified, test is omplete.
If resistance is not as specified, replace ECT sensor.
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:52 AM (Merged)
Tiny
DUYNGUYEN_67
  • MEMBER
  • 1 POST
  • 2002 NISSAN ALTIMA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 186,000 MILES
The engine stalls at low speeds. Sometimes you feel a miss in the engine while running at faster speeds. It makes no difference if the A/C is on. There is no engine light comming on. Can you help?
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:52 AM (Merged)
Tiny
B717DOC
  • MEMBER
  • 8 POSTS
Is the "Check Engine" light on? If so, take it to someone that can read the codes. Then go from there. Mine had like 4 or 5 codes stored, "multi-cylinder misfire" was a couple, then a few they could'nt identify. Raised the hood, and I could hear a pronounced vacuum leak, but all hoses connected and in good condition. Kind tech at the dealership told me exactly what was wrong. Intake gasket blown, very common problem. Bought new gasket, took 4 days to repair in my driveway. No problems since. Now 165,000 miles perfect.
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:52 AM (Merged)
Tiny
CLOROX.BLEACH
  • MEMBER
  • 17 POSTS
I just had the speed sensor replaced a week ago. The thermostat code is a new one though. The main thing I am concerned about is all the problems and symptoms that my car is experiencing and the lean running condition it is in. I'm pretty sure a speed sensor nor a thermostat would make my car behave in such a way.
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:52 AM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Please take not that the speed sensor code does not necessarily mean a bad speed sensor. It could be the wirings and other components as stated in the diagnostic information.

The ECT can cause lean running conditions if it is telling the engine conflicting information as compared with others.

Lean running running conditions can be due to vacuum leakages, slipped cam-timng etc. Have you checked those yet?
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:52 AM (Merged)
Tiny
CLOROX.BLEACH
  • MEMBER
  • 17 POSTS
I haven't been able to have them checked at this moment for other reasons, but I really need to use my car so I need to know what problems could occur when driving my car when it's running lean. I was told by two technicians that it wouldn't affect anything major, but I have read online that driving lean will melt the internal engine components. I don't know which to go buy. What's your opinion on that?
Was this
answer
helpful?
Yes
No
Thursday, January 21st, 2021 AT 10:52 AM (Merged)

Please login or register to post a reply.

Sponsored links