I have a 96 j30 bought new in 96, no problems until this year. car idles down and cuts off, have had diagnosis done by nissan dealer, they couldn't find problem. I have had catalytic converter installed, fuel injector service. carbon cleaned on egr, egr replaced as well as egr temp sensor. Put in coils last year. as well as fuel pump. but i noticed in the forum that its bad to drive the car past a quarter tank. would this have made the pump bad again. when driving on the interstate the car appears to miss but doesn't drive bad.It sputters on startup and idles out or when turning a corner almost like out of gas.
idle down
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maxnix
- Posts: 22627
- Joined: Mon Jul 22, 2002 8:11 pm
- Car: 1995 Infiniti Q45
1995 Infiniti Q45t
2000 Infiniti Q45
Re: idle down (jada1023)
I assume the plugs are new. Did the IAC valve get cleaned? How about the intake path? How many miles? Was the tank steam cleaned when the pump was replaced? What was the fuel injector service?
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metaverse3
- Posts: 415
- Joined: Fri Aug 27, 2004 7:42 pm
Re: idle down (jada1023)
It is not bad to drive car pass the quarter tank. It is bad to drive car on an almost empty tank.. The gas in the tank doubles as cooling. Engineers have taken this into accounting when designing fuel pumps.. You will have problems with dirty gas and failure to replace fuel filters more than you will actually have issues with the pump running below quarter tank...
Check the crank angle sensor...this is what gives timing info to the engine's computer. You can clean this in certain cases.. it is a slit round plate with a laser pulse shining through. I have seen dirt on the plates that can cloud reading. I know this is a procedure that can be done on maxima's..don't know about the J30..it could be a hermetically sealed unit..nevertheless, worth a shot.
Check the IDLE circuitry. The IAA-AAC unit is a notorious culprit on the VE30DE model engine found on the 300zx along with your J30. Check this link: http://www.twinturbo.net/ttnettech/iaa/iaa.html The one thing that he does not mention is the attempt to clean it of soot which it can be done. Or, you can be drastic and replace it..
Check the Fuel injectors..do a leakdown test and power balance test..your mechanic should know this. These injectors are plain garbage.. The late 90's saw a remodel that fixed the original quality issues.
Check the mass airflow sensor..especially the grounding.. This is also a known problem...Check all grounding points while you are at it..Besides the above..check the PCV valve.and the charcoal canister... Don't overlook vacuum leaks..they can lead to stalling..
Has this car ever run properly after all the work was done ? post back with updates..
Check the crank angle sensor...this is what gives timing info to the engine's computer. You can clean this in certain cases.. it is a slit round plate with a laser pulse shining through. I have seen dirt on the plates that can cloud reading. I know this is a procedure that can be done on maxima's..don't know about the J30..it could be a hermetically sealed unit..nevertheless, worth a shot.
Check the IDLE circuitry. The IAA-AAC unit is a notorious culprit on the VE30DE model engine found on the 300zx along with your J30. Check this link: http://www.twinturbo.net/ttnettech/iaa/iaa.html The one thing that he does not mention is the attempt to clean it of soot which it can be done. Or, you can be drastic and replace it..
Check the Fuel injectors..do a leakdown test and power balance test..your mechanic should know this. These injectors are plain garbage.. The late 90's saw a remodel that fixed the original quality issues.
Check the mass airflow sensor..especially the grounding.. This is also a known problem...Check all grounding points while you are at it..Besides the above..check the PCV valve.and the charcoal canister... Don't overlook vacuum leaks..they can lead to stalling..
Has this car ever run properly after all the work was done ? post back with updates..