URGENT! NSX is stranded 1000 miles away from home

[goldNSX]

My friend is stranded somewhere in Croatia with a 99% fuel related-problem. Suddenly his car stopped.

He has a Walbro 255 in the tank with the SOS wire harness kit. I'm not familiar of a sudden death of a Walbro fuel pump. So I think it's an electric problem. He checked the 15A fuse in the footroom of Driver and the main relay does a 'click' when going to ignition. I've told him to check the voltage around the SOS relay to see if the fuel pump gets power. There's a fuse in the engine fuse block and one in the SOS block he's going to check tomorrow.

Anything else he can check? Any help greatly appreciated.

 

[BATMANs]

Did the tachometer drop past zero suddenly?

I'm having issues as well and the shop thinks it's a main relay. We are going to just replace that and take my chances that it will fix my issues.

Boy, I focking hate electrical problems more than anything else...... I really do.

 

[nsxtasy]

Electrical cable attachments to the battery posts.

Main relay.

 

[BATMANs]

If the wiring to and from the battery is loose does that cause the car to stall? Wouldn't the alternator just keep it running?

 

[cmc140]

My friend is stranded somewhere in Croatia with a 99% fuel related-problem. Suddenly his car stopped.

He has a Walbro 255 in the tank with the SOS wire harness kit. I'm not familiar of a sudden death of a Walbro fuel pump. So I think it's an electric problem. He checked the 15A fuse in the footroom of Driver and the main relay does a 'click' when going to ignition. I've told him to check the voltage around the SOS relay to see if the fuel pump gets power. There's a fuse in the engine fuse block and one in the SOS block he's going to check tomorrow.

Anything else he can check? Any help greatly appreciated.

If it's a CTSC there is a fuse inline to the fuel pump. It's located on the inside firewall by the fuel pump access plate.
I've had this blow out before on hard acceleration. Definitely worth a look.

 

[nsxtasy]

If it's a CTSC there is a fuse inline to the fuel pump. It's located on the inside firewall by the fuel pump access plate.
I've had this blow out before on hard acceleration. Definitely worth a look.

Would that cause the car to stall, or would it only disable the supercharger?

 

[cmc140]

Would that cause the car to stall, or would it only disable the supercharger?

It would cause the fuel pump to not get any voltage.

 

[BATMANs]

If that is the cause and if the car was in boost I would really worry about a momentary lean A/F ratio from fuel starvation which could have resulted in a detonation....

 

[96cxt]

Did he just fill up and stalled about a mile later?
If so I have had friends in the past who have put diesel in mistake and didn't even know it until someone asked. So if everything seems like it's working properly than your friend might have put Diesel fuel in mistake. I hope this is not the case, but I thought it might be worth mentioning.

 

[BATMANs]

I had a friend do that to his NSX. The exhaust smelled VERY toxic.

 

[goldNSX]

Thanks for the hints and fast help! We really appreciate it. It's nighttime here and I won't hear from him for the next 5 hours or so.

Yes, the car is CTSC but he was not in boost. In cruising mode the car stalled.

I don't think he put diesel in it because our equipment pervents filling diesel in a gas tank (different size). I'm not aware if he has filled up his tank, I guess he did as he was on a racetrack. Maybe bad gas or the fuel-filter clocked.

Thanks again.

 

[NSX1145]

Fuel filter clogged is highly unlikely.

Main relay controls the fuel relay, so if the main relay is good (i'd personally recommend opening it up to verify the solder points)...then check the fuel relay (inside engine compartment).

 

[cmc140]

I also had the fuse on the firewall blow when trying to start the car one time. So, it doesn't necessarily have to be in boost. I've never had an issue after removing the boost-a-pump stock ctsc fueling.

There was another thread similar to this, a while ago, and the issue turned out to be a loose ground for the ignitor on the top plate of the manifold.

Anyhow, those are the simple checks. Hopefully, it turns out to be something easy. Good luck.

 

[goldNSX]

Thanks for all help!

The car of my friend is up and running again. He told me something about a bad plug but he wasn't concrete on this. So he owes us the full story. But for now he deserved his short Holiday time.

Thanks again!

 

[shawn110975]

I was gonna say take the fuel line off the top of the engine and turn key on, gas should spray but yes... we want to know what made the car act this way

 

[BATMANs]

Well if it happens agin or intermittently then I'm guessing a main relay. That's what I'm going through at this very moment.

 

[goldNSX]

He didn't mention the main relay. He would have if this was the case. I'm not sure but he changed it anyway lately. It was a 'plug' but I don't know which exactly. I'll squeeze this info out of him when he gets back.

His first thought was the fuel pump and having to drop the fuel tank, not a very pleasant thought out in a foreign country (for comparison: US -> Mexico). From this point of view, electronic gremlins are easier to fix.

I like to idea of carrying a small multimeter and some fuses in the trunk just in the case...

 

[goldNSX]

UPDATE: It was a plug that my friend used by mistake between the fuel pump and the SOS fuel kit. This plug is not standard and was used by my friend instead of a save connection. This standard plug was simply overpowered by the current demand of the Walbro 255 on the race track one day before.

Additional note: this Problem didn't occur sooner as the Walbro draws around 8A at 40 psi BUT around 50% more at 80-90 psi where the CT under boost is running at.

So nothing to fear for other drivers.

Thanks again!