Jun 142017

 Nissan Frontier

Replacing the factory transmission cooler

So I was thinking about replacing the factory transmission cooler with an aftermarket trans cooler. I replaced transmission about 2 years ago. I do not want to burn this one up. Should I be doing something different?

Heat is the number one cause for transmission failure. You are thinking along the right lines as far as what can be done for precautionary measures.

You might want to consider making sure both your cooling fan relays are functioning properly as well. In conclusion there is a low and high fan relay.

How to check your cooling fan

The cooling fan will operate at low speed with the power being supplied through the low speed fan relay. Place the air conditioning to maximum and the High speed fan relay should kick in and supply the cooling fan with power. You should be able to see the fan speed increase since it is functioning properly.

Jun 062017

Nissan Altima

Will not start until the engine is cold again

I have a 2003 Altima. It will start without any problems cold. But after driving for a while and turning off the car it will not start until the engine is cold again. I have replaced both cats, o2 sensors, the cam and crankshaft sensors to no avail. Please help if you have any idea what this could be I’m extremely frustrated with this car because I cant figure this out. I’m soon to replace the head gasket and fuel pump but I’m tired of throwing money at this car with no solution.


Jun 062017

2009 Nisan Cube

Check engine light keeps going on and off

My check engine light keeps going on and off, so I went to a mechanic to get a diagnosis. They told me that they found oil contamination on the spark plugs from an internal leak. The spark plug tube seal caused the contamination on the spark plugs and catalytic converter. He’s recommending that in order to get rid of the Service Engine Light I need to replace not only the spark plugs, but the catalytic converter, O2 sensor, gasket plugs, valve cover gasket, exhaust gaskets and etc. In total he’s charging me $2300 for parts and labor. I’m trying to get a second opinion rather than drop all this money without knowing if there’s a cheaper/alternate route. Thank you.

Post the diagnostic codes and we can find the cheapest solution.

Jun 052017

1994 Nissan Pickup D21I have a 1994 Nissan D21 which I have had problems with the horn blowing fuses before. I just recently replaced the horn and everything was working fine for a couple of weeks. A week ago, I was sitting my truck and noticed the Air Conditioning had stopped working, I tried turning the a/c off then on but it still did not work. I turned my truck off and then back on and it came back on. A few minutes later, I drove off and turned the radio up and it stopped playing music but still had power to the radio. The next day, I was backing up, blew my horn and the fuse had blown. When I pulled out on the highway, I realized my turn signals would not work. I tried my flashers and they are working. Any idea of where I need to start looking? I brought it to a mechanic and he sat on it for a week then went on vacation.

Looks like you may need to do some tracing in the wiring. Use the wiring diagram provided to assist in tracing the wiring harness.

Turn Signal Wiring Diagram 1994 Nissan D21 Pickup

Apr 112017


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?


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

Mar 142017

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


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?


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.