Need some help with my Pulsar

[dan1758]

HELP!!!!

I bought my Pulsar recently to do track days and it appears to have a problem:

Once I've hit the apex of the bend and started to give it some beans the engine revs to around 5000rpm and then the engine bangs, I get a loss of power and then it picks up again. Its like a "missfire" and then its back up and running again.

Any Ideas????????

I've done 3 trackdays in the last 3 months and other than this the car is fantastic on track but i can only use it up to 4500rpm.

I have been told its a missfire, fuel surge and that i need a swirl pot??????

Any help would be most welcome.

Regards,

Dan

 

[pschurr]

This is the oldest known problem with the Pulsar.
Why would you not believe what you've been told. It is correct.

The fuel tank spans the width of the rear subframe. The fuel pump drop into the lhs of the tank.
When you get enough g-force through left-hand corners, the remaining fuel sloshes to the right of the tank.
The fuel pump then sees air at its pickup and you lose pressure on the rail. The engine suffers immediate lean out, goes stupid hot and fuel vapour explodes as soon as it splutters into the combustion chamber.

The reason is occurs is this - the gtir is a poorly designed and poorly made car. The engine is good, but everything else is garbage.
You need to install an anti-surge tank and external primary pump, so that when the in-tank pump sees air, the external pump will still be providing fuel pressure to the rail.
Or just keep it filled to more than 3/4 all the time.


peter

 

[dan1758]

Why would you not believe what you've been told. It is correct.

Its not that i didn't believe what I'd been told its just that I wanted to hear it from some one who knew a bit more about the Pulsar than the person telling me.

Thanks for your help

 

[whytie]

The reason is occurs is this - the gtir is a poorly designed and poorly made car. The engine is good, but everything else is garbage.

peter

A would'nt go that far, for a 20 year old car i think it gives a good account for itself.

 

[fubar andy]

Baffle out the tank, that should help with the fuel "sloshing" around the tank as much :thumb: