Apr 112017
 

Hello,

Nissan Altima

Car jerks on acceleration and deceleration

I got a Nissan Altima 2004 , 2.5L. When I let off gas the rpm drops quickly to 1000 and jump to around 1200 and again drop back to 1000.
Also the car jerks on acceleration and deceleration mainly from 1 to 2 or 2 to 1. It looks the
transmission has delayed shifting …
My engine mounts were weak because when I was changing gear from P to R ro N to R the engine used to jerk, I replaced the (except tranny mount) but now after a month I think the mounts are loose again and engine moves a lot.
Do you think the jerky shifting might be caused by a weak or broken tranny mount ? or it’s the solenoid or valve body issue? there is NO light on.
By the way, the jerky shifting is much more noticeable when I accelerate slowly, I don’t feel a jerk if I push the gas pedal with high rpm and high acceleration


 

Apr 062017
 

1999 Nissan Frontier Dome Light Stuck OnHi I have a question regarding my interior dome light. I replaced both door switches and have the dome light on the door setting and it only dims instead of going off when doors are closed? Can I fix this myself and what do I need to do to fix it?


RESPONSE

Your ability to fix the problem is only limited to your skills and knowledge. If you are comfortable using a multi-meter this should be a home fix. Understanding how the circuit works and then repairing or replacing the issue component. Fortunately for us the circuit is small with few components. We have 1 wiring harness, 3 switches, one fuse and a dome light.

Most Likely Cause

Faulty Dome Switch

How to Diagnose the Dome Light

We know your fuse is good so we can skip that. We know the bulb is good. You replaced the door switches and DO see the light dim when the door is shut. The light is however staying on as you stated. So we know battery positive is getting tot he bulb on the RED/GRN wire. Next we will need to determine where the Dome light is picking up the battery negative feed.  Check the RED/BLK wire. No Battery negative should be seen when the doors are closed. Battery negative should be seen when doors are open. This means the door switches are working properly. So we are left with the Dome Light Switch and a wiring harness.

The BLK wire should be battery negative at all times. The dome switch should only see the battery negative on the BLK wire when it is switched to the “ON” position. If the dome light bulb is receiving battery negative from the BLK wire when the switch is in the “OFF” or  “DOOR” position the switch may be faulty. Replace the dome light switch. If this is not the case then you are left with tracing the wiring harness and looking for a short.

1999 Nissan Frontier Dome Light Wiring Diagram

1999-nissan-frontier-interior-lights-courtesy-lamps-circuit-w-o-door-locks-1-of-1
Mar 142017
 

Nissan Maximamy automatic transmission runs normal until 3rd gear than there is high revs and no forward power.


RESPONSE

Check your transmission fluid level first. Top off and test if low. If the fluid level is full take note of the color. I like to use a paper towel and some fresh fluid to compare the color. If the transmission fluid looks burnt or dark, then you are looking at internal clutches burnt. Lets say the color is clean and looks good. Then you are most likely looking at a failed component such as a shift solenoid. Sometimes the computer will store a code that can indicate a failing sensor. A scan tool is required to retrieve these codes.

Mar 082017
 

Nissan QuestI hear a squealing type sound (high pitched) that occurs once the vehicle is in Drive and the sound seems to be tied to the speed of the vehicle. I think it is a belt problem, but am not sure. What do I need to do to check it out? I have belt dressing but I’m reluctant to use it because I don’t want to get any of the spray on the serpentine belt. Any hints?


RESPONSE

How I like to test a belt squeal is by using a check a replace method. I have found over the years that if a serpentine belt starts to squeak there is no fixing it, only replacing it. But of course you want to know for sure that the squeak is in fact coming from the belt.

Test Squealing Belt

  • Raise hood and start engine
  • Listen for squealing belt
  • Spray WD-40 Directly on the belt(safety googles, it may spray all over)
  • If the noise disappears while spraying, Replace the belt.

Now lets suppose the noise did not go away when spraying the belt. This means the belt is not the issue. Next step would be to remove the belt and start the engine. If the noise is still there you know it is internal int he engine. If the noise is gone, you know one of the components the belt drives is faulty.

Feb 272017
 

2005 Nissan AltimaMy car starts to make a rattling noise from under the hood after being warmed up. It only happens when it’s been running for 20+ minutes. Sometimes it does it for a brief second when cold starting, but then goes away until it gets hot again. When hot, its volume increases accordingly with the rpms and gear changes and stops the second I let off the gas. I have been unable to do it while in park, so I can’t really listen to it unless I’m driving. I know it is not my exhaust heat shields. Have been told it could be the timing chain, but I had the engine replaced ~5500 miles ago, so I hope not! Any advice would be highly appreciated!! Here is a link to a video of my problem.


Rattling Noise

Have to say it doesn’t sound familiar to me. I will go ahead a post this so maybe someone else that might have experienced this can chime in.

Feb 142017
 

2007 Nissan TitanThe door chime sounds when the key is out of the ignition when the driver side door is open. It also sounds when the key is in the ignition and the driver side door is open. If the switch in the door frame is manually pressed in the chime stops sounding. It is a 2007 Nissan Titan crew cab 2WD 5.6 V8 with an Auto transmission.

I wish to fix the condition where the door open chime sounds when the key is out of the ignition switch. Otherwise, every thing seems to be working fine.

Do I need to replace the ignition cylinder,or is there a less expensive fix?


RESPONSE

Door Chime Sounds

It sounds to me like you have pretty much figured it out. You are headed in the right direction with your diagnosis. The key and tumbler may not need to be replaced but you will need to dig into it for sure. You may find some poor contacts that may be able to be fixed without replacement.

 

Feb 012017
 

2004 Nissan MaximaI just bought a 2004 Nissan Maxima and I’m having problems with the rpm’s running high. When I hit the brake the rpm’s go up a few hundred and then will come back down and when this happens I can feel the jump in acceleration. Also because the rpm’s run high, when u go to shift into another gear without letting the rpm’s come down, it will shift hard making it feel like my transmission is hitting hard. Anyone know what could be causing this???


RESPONSE

High RPM

What you have described is a perfect description of a vacuum leak. if any work has recently been done on the vehicle you may need to perform an Idle Air Volume Re-Learn.

Idle Air Volume Relearning Procedure

Without Scan Tool

To Perform:

NOTE: Use a clock to measure the time during the following procedure.
1.Verify the following operating conditions exist; ◦Battery voltage is more than 12.9V at idle
◦Engine coolant temperature is 158� – 212�F (70� – 100�C)
◦PNP switch is ON
◦Electric load switch is OFF (all loads off)
◦Steering wheel is straight ahead
◦Vehicle is stopped and transmission is at normal temperature

NOTE: If equipped with DRL, apply parking brake before starting engine to turn off DRLs.

2.Perform Accelerator pedal released position learn procedure.
3.Perform Throttle valve closed position learn procedure.
4.Run the engine to normal operating temperature.
5.Turn the ignition switch OFF for at least 10 seconds.
6.Verify the accelerator pedal is fully released and turn the ignition switch ON for 3 seconds.
7.Press and release the accelerator pedal 5 times within 5 seconds.
8.Wait 7 seconds and then press and hold the pedal to the floor for 20 seconds until the MIL stops blinking and stays ON.
9.Release the pedal within 3 seconds from the time the MIL turns ON.
10.Start the engine and allow it to idle.
11.Wait 20 seconds.
12.Rev the engine a couple of times and verify correct idle speed and ignition timing; ◦Idle speed: 650+/-50 rpm
◦Ignition timing: 15�+/-5�

Jan 232017
 

2008 Nissan QashqaiIs this Normal?


RESPONSE

This is a perfect example of a properly functioning engine rev limiter.

Rev Limiter

A rev limiter is a device fitted to an internal combustion engine to restrict its maximum rotational speed. Rev limiters are pre-programmed into the car’s Engine Control Unit, except aftermarket units, which are packaged as a separate micro-controller. Cars need a limiter because it prevents the engine from operating above a pre-determined RPM level known as the redline.

Limiters usually work by cutting off a necessary component needed for the combustion processes, although some will change ignition timing. Commonly, rev limiters control the spark or the fuel injectors to the engine.

Types of Control

Spark Control

Ignition Control rev limiting systems work by interrupting the power that is distributed to the spark plugs. Once the car reaches the redline, the engine stops the spark. This is not very common in production cars because it is bad for emissions, as the system still injects fuel into the cylinder and consequently releases unburnt fuel out the exhaust pipe. This type of limiting can also affect the temperatures in the exhaust, causing premature wear on the catalytic converter.

Fuel Control

Fuel-cutting rev limiters are the most common because they are better for emissions, and wear less on engine components. These systems usually start to lean out the engine at redline by cutting fuel to the injectors.

Source: Wikipedia

Jan 172017
 

Nissan TitanMy Nissan turns over and over but wont even act like its going to start till battery runs down. But it started fine Saturday.


RESPONSE

Check to see if it is out of gas. You can also try spraying some starting fluid in the air filter to see if it wants to run. This will let you know if it has spark and just missing fuel. Here is a wonderful no start diagnostic chart we have developed just for this kind of issue.