Cold start issue.

[black g50]

For the past two days,first start in the morning my car will fire up then die.Temp has been around 30,not sure if that has anything to do with it.Restarts fine at around 500rpm then slowly climbs to fast idle speed.Then seems to hunt for correct idle speed going up and down for a min or two with vibrations like a bum injector.After that it smooths out and no problem.Had a problem with cooling system not sure if related,but that's taking care of.

[06_blkout]

I have this issue too, although Sentras have a TSB on it. It involves the built in fuel pressure regulator on the pump housing. Not sure if it's related to your issue, but worth looking in to.

[N/A Q45]

If u can take a video 95% sure I can tell you what's wrong, do you start your car the second you put the key in or turn it on for a few seconds to let's the o2s warm up, fuel pump to push any air out, ect? If not try that and let me know.

[black g50]

[black g50]

Ok,it came back.Seems when I leave the seat heater switch to on,the next day battery is low.If heater switch off car starts and idles fine.Came out from work 5 in the morning and click! no start click click nothing.After a jump she cranked a few times before catching.I think it was told to me that they don't run when car is off,but seems mine do....Is there a fuse I can pull,don't really use heater that often as I wear a huge coat so cant really feel it anyway.

[Skibane]

Ok,it came back.Seems when I leave the seat heater switch to on,the next day battery is low.If heater switch off car starts and idles fine.Came out from work 5 in the morning and click! no start click click nothing.After a jump she cranked a few times before catching.I think it was told to me that they don't run when car is off,but seems mine do....Is there a fuse I can pull,don't really use heater that often as I wear a huge coat so cant really feel it anyway.

I'm 99 percent certain that the DC power to you seat heater is controlled by a relay.

The contacts on the relay are supposed to open when the ignition switch is turned off.

The fact that your seat heater continues to heat after the ignition switch is turned off implies that the contacts on the relay are sticking in the closed position, draining the battery overnight.

Suggestion: Find the relay, and temporarily unplug it. If your problem goes away, you need a new relay.

[black g50]

Any idea where it is ski?

[goody90q45]

Ok,it came back.Seems when I leave the seat heater switch to on,the next day battery is low.If heater switch off car starts and idles fine.Came out from work 5 in the morning and click! no start click click nothing.After a jump she cranked a few times before catching.I think it was told to me that they don't run when car is off,but seems mine do....Is there a fuse I can pull,don't really use heater that often as I wear a huge coat so cant really feel it anyway.

If you haven't already changed out the relay and fixed the problem..... the trim piece that holds the seat heater switches is easily removed by prying with a small screwdriver. Once it's lifted out, the connectors for both switches are in plain sight and can be unplugged.

[elwesso]

The seat heater relay I believe is under the seat, otherwise there's a set of relays under the heater switch... Check out www.nicoclub.com/FSM and it would be in the BF section.

[black g50]

Pulled relay,still doing it first start of the day.Key in,turn on tach goes to where it's supposed to be for a sec,then drops to 500 or lower then slowly climbs higher to normal fast idle.Battery about a year old,alt 3 years...I.A.C?, idle cam? It wont do it no other time except first start.

[black g50]

Battery,alt check out fine.Any suggestions?

[black g50]

Halp!! The old girl still cranky on first cold start of day.Thought maybe gas frozen,added isoheet no dice.

[BCC93QT]

Frozen gas.... in delaware? No way. Sounds like the compression on the fuel tank. If it is not sealed it will idle low until the pump builds compression. Is your fuel pump original or has it been replaced? Unscrew your gas cap in the morning before start up. if it does not pull in air then your tank is mostly likely not fully sealed.

[black g50]

Now that could be it,BCC did have trouble sealing tank a while back.Have to recheck that one,thanks.

[black g50]

Frozen gas.... in delaware? No way. Sounds like the compression on the fuel tank. If it is not sealed it will idle low until the pump builds compression. Is your fuel pump original or has it been replaced? Unscrew your gas cap in the morning before start up. if it does not pull in air then your tank is mostly likely not fully sealed.

You were in the right direction.Had a small drip in fuel line going into engine,somehow clamp became loose or wasn't tight enough....thanks.