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VL Loosing Injection Pulse

HasWon

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Joined
Oct 27, 2020
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Age
30
Location
Queensland
Members Ride
VL Commodore SL
1986 VL SL Factory 5sp

My VL seems to be loosing injection pulse when ever it goes over a certain RPM / SPEED (3-4K RPM) the car will cut out and not start for a few minutes then it will do the exact same thing again.

The car idles fine, and Will rev as high as you want in neutral.

I have changed the following.
- AFM
- Distributor
- IGN Coil
- Spark Plugs
- Crank angle sensor
- Battery
- distributor plug
- ECU

I have checked the Fuel pressure and it’s good.

ECU CODES

- Neutral switch circuit
- Throttle switch circuit
- Satisfactory operation
 

HasWon

New Member
Joined
Oct 27, 2020
Messages
2
Reaction score
2
Points
3
Age
30
Location
Queensland
Members Ride
VL Commodore SL
THE PROBLEM WAS THE FUEL PUMP.
It had 52psi pressure but the pressure would drop when the car started was moving, idled fine but as soon as more fuel was needed the fuel pump could not keep up.

WE FITTED A VS FUEL TANK AND PUMP STRAIGHT IN. THE VL RUN AN EXTERNAL PUMP AND INTERNAL PUMP, WE GOT RID OF THE EXTERNAL AND INTERNAL AND JUST USED THE VS SYSTEM (INTERNAL PUMP).

GOOD LUCK EVERYBODY.
 
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