QuestionQUESTION: Hello, I have a 1995 nissan maxima vq30de. It has been sitting for a couple months without me starting it up. So the other day I went to go take it around the block, but all it would do is turn over and it wouldn't crank all the way. I used to have problems with it stalling at red lights, and bogging out. So I just recently replaced the m.a.f., the battery is fully charged, changed the fuel filter about 6 months ago, cleaned tb and iacv. Any suggestions??
ANSWER: Christopher,
Check the spark plugs for being wet and if so dry them and reinstall them. Second, teh distributor will get contaminated with oil on the optics. If there is oil on the optical shutter wheel replace the distributor with a rebuilt unit.
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QUESTION: I checked the plugs, had a little oil on them. Cleaned them and put them back in. And the vq30de does not use a distributor, it has coil-packs.
ANSWER: Christoper,
If the plugs are firing then you need to look at fuel pressure. I would pull a coil pack and leave it connected and get a length of wire and hold the wire about a quarter of an inch away from the valve cover and have someone crank the engine and see if you are getting spark. You will probably have engine codes set and since yours is a 1995 you can check them without a scanner. Get a Haynes Book and use the procedure for your vehicle.
The ECU has a window on one side to view a red LED and a green LED - when checking fault codes, a red flash is worth 10, and a green flash is worth 1. So for example, the code to say that everything is functioning normally would be 5 red flashes and 5 green flashes - the code is 55.
The ECU has 5 modes of operation, for diagnostics codes, it has to be set to mode 3.
1. Make sure the screw next to the viewing window is turned clockwise.
2. Turn the ignition on
3. Both LEDs with flash once, then a pause, then a second time, then a pause, etc. etc. up to 5 times then will repeat the process. After is has flashed 3 times then turn the screw completely anti-clockwise. - this will select mode 3.
4. The LEDs will now flash codes. 55 means that everything is normal. The rest are written below.
5. When finished, turn the screw back to clockwise and the ECU will reset itself automatically.
Don't worry about the '5th cylinder misfire' and '6th cylinder misfire' or anything, the codes are the same for all Nissans.
11 Crank Angle Sensor/Camshaft Position Sensor.
12 Air Flow Meter/Mass Air Flow Sensor.
13 Engine Coolant Temperature Sensor.
14 Vehicle Speed Sensor.
21 Ignition Signal.
22 Fuel Pump.
23 Idle Switch.
24 Throttle Valve Switch.
25 Idle Speed Control Valve.
28 Cooling Fan Circuit.
31 ECM.
32 EGR Function.
33 Heated Oxygen Sensor.
34 Knock Sensor.
35 Exhaust Gas Temperature Sensor.
36 EGR Control-Back Pressure Transducer.
37 Knock Sensor.
38 Right hand bank Closed Loop (B2).
41 Intake Air Temperature Sensor.
42 Fuel Temperature Sensor.
43 Throttle Position Sensor.
45 Injector Leak.
47 Crankshaft Position Sensor.
51 Injector Circuit.
53 Oxygen Sensor.
54 A/T Control.
55 No Malfunction.
63 No. 6 Cylinder Misfire.
64 No. 5 Cylinder Misfire.
65 No. 4 Cylinder Misfire.
66 No. 3 Cylinder Misfire.
67 No. 2 Cylinder Misfire.
68 No. 1 Cylinder Misfire.
71 Random Misfire.
72 TWC Function right hand bank.
73 TWC Function right hand bank.
76 Fuel Injection System Function right hand bank.
77 Rear Heated Oxygen Sensor Circuit.
82 Crankshaft Position Sensor.
84 A/T Diagnosis Communication Line.
85 VTC Solenoid Valve Circuit.
86 Fuel Injection System Function right hand bank.
87 Canister Control Solenoid Valve Circuit.
91 Front Heated Oxygen Sensor Heater Circuit right hand bank.
94 TCC Solenoid Valve.
95 Crankshaft Position Sensor.
98 Engine Coolant Temperature Sensor.
101 Front Heated Oxygen Sensor Heater Circuit right hand bank.
103 Park/Neutral Position Switch Circuit.
105 EGR and EGR Canister Control Solenoid Valve Circuit.
108 Canister Purge Control Valve Circuit
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QUESTION: What are the other modes for the ecu? And how can i tell if my fuel pump is bad, thats what i think is the problem. I pulled the codes last week and it was 13, so i changed the sensor. but when i was trying to jumpstart it, it wouldn't charge. it made a fast clicking noise?
AnswerChristopher,
Remove your battery and get it fully tested and charged. You have to have a good battery to see what is going on with the car.
Get a fuel pressure gauge and screw it onto the fuel rail so you may check fuel pressure.
With a fuly charged battery befin the test.
Two things with the fuel pressure. First, if you in the 30-40 psi range the pump is fine. Check the leakdown pressure and see if the pressure drops to zero after you turn the key off. If it immediately drops to zero there are leaky injectors that will have to be replaced.
