J30 is stalling while stopped at intersections

[Chris Halkides]

Good Evening,

My 1997 J30t (165,000 miles) has in the last month started stalling while stopped at intersections. There is also a long lag between the time I press the accelerator and the time the car actually accelerates, and sometimes the car accelerates and decelerates when I am traveling at low speeds. I thought that I might have gotten some bad gas on a long trip, so I tried IsoHeet twice, but nothing changed. When I took it to my shop, they found two codes, P0325 (knock sensor) and P0750 (shift solenoid) had been stored, but the car did not repeat this when in their hands. They cleaned the throttle body because of excessive carbon build up. However, the same symptoms are still present. Thoughts?

[driverdriver]

When your J30 stalls I assume you have to re-start it? Sounds like a fuel pump/sending unit issue. I had the same issue a number of years ago. A fuel pump replacement fixed the issue. Note: in order to access your fuel pump, the back seats need to come out.

[Chris Halkides]

Thank you. Yes, I have to restart it. Until tonight, there were no symptoms at highway speeds, but I noticed tonight that there was some tendency to lose power even when cruising at 50-55 mph. I think that I replaced the fuel pump around 60,000 miles, so it might be time. Should the fuel filter also be replaced?

[J30inthe sun]

Thank you. Yes, I have to restart it. Until tonight, there were no symptoms at highway speeds, but I noticed tonight that there was some tendency to lose power even when cruising at 50-55 mph. I think that I replaced the fuel pump around 60,000 miles, so it might be time. Should the fuel filter also be replaced?

If the fuel filter has not been changed it would be a good idea to change it.

I had similar issues years ago where my car would stall sitting at a light, it would start right up again. The problem was the mass airflow sensor.I replaced it & the problem went away.

Also, even though the mass airflow sensor was bad the ECU never threw a code showing it was malfunctioning.

[Chris Halkides]

My shop said it was the mass air flow sensor. When I went to my favorite parts supplier, they said the part number was 22680-31u05, which I found ($$$). But my shop also wanted a boot and two hoses that run to the throttle body. My parts supplier said that the boot was part 16577-10y10, but when I went to their website, I received a message that this part was not available. Unfortunately I left my shop manual with the car, so I cannot check it out as a reference. How can I get the correct part number?

[J30inthe sun]

My shop said it was the mass air flow sensor. When I went to my favorite parts supplier, they said the part number was 22680-31u05, which I found ($$$). But my shop also wanted a boot and two hoses that run to the throttle body. My parts supplier said that the boot was part 16577-10y10, but when I went to their website, I received a message that this part was not available. Unfortunately I left my shop manual with the car, so I cannot check it out as a reference. How can I get the correct part number?

Are the hoses & boots broken or damaged? I just took my MAF sensor off to clean it & did not have any problem with the hose it is attached to (it's flexible).

[J30inthe sun]

A search on eBay for 22680-31u05 showed several units for less than $30 shipped! That's a steal if they work correctly. I paid @ $250 @ 6 years ago at my local Advance Auto Parts.

[Chris Halkides]

A search on eBay for 22680-31u05 showed several units for less than $30 shipped! That's a steal if they work correctly. I paid @ $250 @ 6 years ago at my local Advance Auto Parts.

Infinitipartsusa wants $460!

[Chris Halkides]

A search on eBay for 22680-31u05 showed several units for less than $30 shipped! That's a steal if they work correctly. I paid @ $250 @ 6 years ago at my local Advance Auto Parts.

Infinitipartsusa wants $460!

The ones on eBay are mostly remanufactured. Does anyone have experience with Bosch mass air flow sensors?

[J30inthe sun]

The ones on eBay are mostly remanufactured.

The ones I see are advertised as "brand new"

[Chris Halkides]

You are right about the ones on eBay (I double-checked and found I was mistaken). I may have made the wrong call; I went with the pricey OEM MAF sensor before I saw you note. But I had to go to eBay for the hoses and the assembly (which my shop referred to as a boot), because at least some of these parts are not available from Infiniti any longer. I have the feeling that this sort of situation is going to occur more frequently the longer I hold only the car. I am worried that plastic parts and hoses are going to degrade, and I won't be able to replace them.