Car not starting when hot

[socalsupra]

hi, ive been having some issues lately with starting my 1991 NSX. In the morning it will start no problem but after i drive it for some time and make a couple pit stops sometimes it will just turn over and not want to start. I replaced the fuel pump and obviously use premium gas, its really driving me crazy so i thought i would consult the pros on prime before handing my car over to the dealers and get raped, hopefully you guys can help me out with this, thanks in advance.

 

[s14_tat]

Could be your main relay if your fuel pump is not turning on.

 

[hondacuraplanet]

+1 for the main relay

 

[socalsupra]

Where is the main relay located and any idea why it would not work when its hot?

 

[pgilliam1]

The main relay is behing the passenger seat on the firewall behind the plastic cover panel (it says "main relay" on it and is an easy DIY).
If you hear your fuel pump hum when you turn your key on (listen carefully and you can hear it for a few seconds) then it's not the relay. Main relays are a known problem and are intermittant in failure.
Good Luck and Happy Motoring!

 

[rbirling]

Where is the main relay located and any idea why it would not work when its hot?

The reason it becomes intermittent is because of cold/cracked solder joints.

 

[Thunder]

my NSX had difficult to start hot, I've replace the sparkplugs, the old ones were too old and very worn , now, the engine starts immediately when the engine is hot! :smile: