Skip the auto shop - Our mechanics make house calls

Q: lose of power stalling after being driven for more than 2 hours.

asked by on

My truck developed an engine problem about 6 months ago where it would start to loss power and shutter almost stalling only after being driven a long distance (longer than 45 miles) or after being driven in stop and go traffic for a period of time. Going to work (about 30 miles and back) I never had a problem. I did not have any lights on and took my truck in for repair. They cleaned the fuel injectors and replaced the spark plugs which seem to work for a short time but than the problem started again and the check engine light came on indicated the exhaste system was bad. I replaced the exhaste system, converters, O2 sensors and this has seem to work for the last 6 months although the truck still did feel right It would bog down if trying to accelerate to fast. Now the engine is started to do the same thing. When it starts to lose power, I pull off the road wait a few minutes and I am good for a few more miles or more.

My car has 222000 miles.
My car has an automatic transmission.

A: The ECM relay can cause intermittent voltag...

The ECM relay can cause intermittent voltage loss causing a stall or no start. Try swapping the Engine Control Module (ECM) relay with the front fog lamp relay. Some Titans have had ECM relay problems so that may fix your truck. The ECM relay is located in the Intelligent Power Distribution Module (IPDM) under the hood in the right rear of the engine compartment between the battery and the firewall. The only way to replace the ECM relay with a new one is to replace the IPDM as an assembly.

I also suggest having a technician perform an exhaust system back-pressure test to eliminate exhaust restriction as a possible cause of low power (bogging down). The aftermarket exhaust system and cats may not be as free flowing as the original Nissan system. I would want to see fuel pressure test results on your truck. And due to high mileage, a compression test is in order to confirm that all 8 cylinders are still sealing well and making good compression. I would recommend having the loss of power issue inspected by a certified technician so that you get the car back to running smoothly again.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: jerking when you get up past 45mph and is shutting off

Hello. If the engine is misfiring and shutting off at this speed, then that can be caused by a number of issues. Most of the time, this is caused by a failing distributor. These are a common problems on this...

Q: Gear shift lever stuck in park

Hi. Your shift lock switch may be engaged. It will be in one of two places. On the top of the steering column of the instrument cluster or right by the shifter itself above the Park icon on the shift...

Q: Windows open during storm & caused multiple problems

It is very likely that the water ingress from the windows being open during the storm has caused these malfunctions. Yes, the wiper switch input from the steering wheel is a coded input to the wiper motor assembly, which does...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...