Strong gas smell when starting

Originally Posted by Z_ealot

This all started around the same time i started having overheating issues after i had the dealer flush the cooling system, the odd thing with the cooling system is that the only time it overheats are when outside ambient temps are high and the ac system is going. Shut off the ac and the system goes back to normal temps. I’ve done a pressure test on the system to check for leaks and turned up nothing, switched out the thermostat which also did nothing, switched out the radiator which did nothing. Bled the system and flushed it multiple times to no avail, the only thing i havent done is switch out the water pump, but everyone I’ve talked to has a hard time believing the water pumps on our engine could fail due to their design. The only hypothesis i can come up with at this point is that the water pump is not moving enough coolant, therefore causing hot spots in the engine and throwing everything off. The car is very reactive for the first half hour to hour that it’s on, but the moment the emgine starts to get any amount of heat soak, the performance drops pretty dramatically to the point where i feel no power until after 5,000rpm. The only other symptom that i could point out that seems odd to me is that when the engine is completely heat soaked i start to get a light kind of tapping from what sounds like either cylinder 5 or cylinder 6, but goes away immediately after shutting off and restarting the engine


Sent from my iPhone using Tapatalk

Originally Posted by Jhill

Oh I remember that post. So the overheating has still not been fixed either? What reason did you change the mafs and clean throttle bodies etc? Did you ever do a block check on the cooling system? I can’t remember

Originally Posted by Z_ealot

Yup, performed a block check as well multiple times and turned up nothing. All i know at this point is that everything seems to be pointing towards heat being the instigator when it comes to the fuel trims and the engine bogging down. The only other odd thing i can point out that started more recently within the last two months is that from a cold start right as the coolant temps are getting up to normal if im accelerating i will hit a dead spot in the powerband that lasts for no more than a second and then the car will be completely fine after that until the engine gets heatsoaked and starts bogging down again.


Sent from my iPhone using Tapatalk

Originally Posted by Jhill

Hmm I’m kind of out of ideas for remote help. Any chance the AC compressor is going out and just poor timing after the cooling service (I highly doubt it)? I’ve never seen one put extra load on the system to make it overheat but I’m kind of lost here. Running lean would run hotter but your fuel trims don’t indicate that and you don’t have any fuel trim faults, all your ***** new and both banks seem to be balanced. Your in SoCal there should be some good shops down there but remotely (and not a Nissan specialist) I’m drawing a blank.

Originally Posted by Rusty

Check your A/C for a leak. One of the o-rings at a connection may not be right.

Originally Posted by Jhill

Hmm I’m kind of out of ideas for remote help. Any chance the AC compressor is going out and just poor timing after the cooling service (I highly doubt it)? I’ve never seen one put extra load on the system to make it overheat but I’m kind of lost here. Running lean would run hotter but your fuel trims don’t indicate that and you don’t have any fuel trim faults, all your ***** new and both banks seem to be balanced. Your in SoCal there should be some good shops down there but remotely (and not a Nissan specialist) I’m drawing a blank.