04 NISSAN SENTRA 1.8L HARD START

25

Asked by Mar 31, 2008 at 02:23 PM about the 2004 Nissan Sentra 1.8 S

Question type: Maintenance & Repair

I HAVE A POBLEM GETTING IT TO START, MUST PUMP THE GAS A FEW TIMES AND KEEP IT REVING FOR A FEW MINUTES. IT DOES IT AT ALL TIMES HOT OR COLD. REPLACED FUEL PUMP ASSEMBLY,DIDNT HELP. IT WILL IDLE AFTERWARDS,BUT LOW. SWAPPED OUT RELAY DIDNT HELP EITHER.WHATS GOING ON HERE?

5 Answers

7,375

could be a throttle sensor, but I would get it looked at. Your car needs to be scanned to see if there is any fault codes

1 of 1 people found this helpful.
135

same here my 2004 sentra does the same it starts - then it starts then shakes and die immediately or sometimes it just cranks for a long time then finally starts ..it wierd...most of the time its fine.

8 of 8 people found this helpful.
2,205

Check the IACV, your fuel filter, and especially all your vacuum lines. It really sounds like you have unmetered air coming in somewhere. You can also try re-grounding the MAF (Mass Airflow Sensor) and/or cleaning the MAF - just remember not to use anything other than MAF cleaner to do so. If none of that does the trick, then check your TPS (Throttle Position Sensor).

1 of 1 people found this helpful.
40

I have a 2004 sentra too and it just started doing it. It starts in the morning in about 5 seconds. I can drive it and it great. I can kill it and restart it in a matter of minutes and starts up better. If it sits for 20 minutes or longer it will take 5 minutes to start. Just turns over. I've replaced the cam sensor, crank sensor, head gasket, the idle and tps is one piece with the throttle body and replaced that as well. New plugs and 2 coils, coolant sensor, checked for vacuum leaks which was none, reprogram my computer and relearned my throttle body. Out of ideas now.

4 of 4 people found this helpful.

its most likely the upstream o2 sensor, replace it, clear the code and it should be fine, happened to mine, put it on a scanner, brought up the DTC and put the 02 sensor on, car started up great and haven't had a problem since

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