My GTR stalled on the highway, help with troubleshooting?

[cobrAA]

OK guys, since the past month, I did a couple of things on my GTR. I ask my friend who is a Hewitt mechanic but own a GTR so he's fine with the rb26.


So, I was going to my exhaust appointment to have my bung weld so I can get on the dyno and fix the leak. After 10 minutes on the highway crusing at 120kmh, my cat light turn on.then turn off. but 15 seconds later, I heard a backfire and ZUUUMMM my idle goes to 1000 rpm. no acceleration.Nothing. I found a spot to stop and wait for the towing. So, I get to my exhaust shop on the towing and get my leak fixed. We tried to fire the car but it just won't fire. it will crank but not fire.

What do you guys think? I thought it was my ALT belt because it made a crappy sound 2 days ago but my mechanic said he just tight it up a bit and it was fine. So, I'm thinking it could be my denso fuel pump.. no fuel, no fire.

FOUND IT. THE SHAFT ON THE CAS BROKE IN HALF!! so the shaft was spinning freely without connection to the cas.

[RGB]

Hey you checked your ECU codes? It sounds like the ECU might be putting it in limp mode, but a normal limp mode would be small/no boost and running really rich. That's not exactly what you've described here.

This also might be a stupid suggestion, but you said no acceleration.... Maybe the throttle cable is pooched?

[Zacho]

Test for fuel pressure

Did you wire up the denso pump?

[cobrAA]

Test for fuel pressure

Did you wire up the denso pump?

oem wiring.


Fuel pressure test :

http://www.ehow.com/how_2143018_test-fuel-pressure-cartest-fuel-pressure-car.html

But how can I get a reading if I can't even start the car ?

[sarazinj]

is the cas tight? perhaps the car lost ignition timing

[cobrAA]

is the cas tight? perhaps the car lost ignition timing

I appreciate your info, I will go take a look at those things in 1 hour.

[cobrAA]

I just check, everything seems well connected and in place.

One thing tho, lots of people says to not tap the boost controller on the FPR. Well, he did. Could it be something related to this?

Also, my fuel is to 1/4. Do denso 280hpl pump prefer to always have more fuel in the tank?

[cozmosland]

i would imagine that that shouldnt be an issue since 1/4 could be up to 20 liters of fuel in the tank unless the pump is set really high in the tank....

[MikeRWK]

he tapped into the fpr line for the boost controller?

[cobrAA]

he tapped into the fpr line for the boost controller?

yeah. well I read that it's not a good idea but I know 3 guys who tapped the fpr and everything is fine.

[cobrAA]

FOUND IT,,, THE SHAFT ON MY CAS WAS BROKEN IN HALF..

[archaeic_bloke]

how did that happen? lol

[cobrAA]

how did that happen? lol

I guess we will never know..

let just say it was 20yr used..

[cobrAA]