M:\Product Information\366-348\Instructions\366-348 MGB Fuel Injection Installation Instructions_Grant_2.doc
Installation Part 27 – Troubleshooting
Problem - Car will Not Start
1. Check Fuel Pump
1.1. Listen for operation of the fuel pump in the first 3 seconds after turning the ignition key to ON.
Remember, the pump will shut off automatically if the key is left in the run position without going
to the START position.
1.2. If the pump is operating, go to 3
1.3. If the fuel pump is not operating, go to 2
2. Pump is Not Working
2.1.1. Check fuel pump power.
2.1.1.1. The red wire with white stripe should have 12V at the “+” terminal on the pump.
2.1.1.2. Check for 12V at the fuse box connection, position 7.
2.1.1.3. Determine why there is no power and correct the problem.
2.1.2. Check the fuel pump ground.
2.1.2.1. Ground wire at fuel pump negative post should show continuity to chassis (use OHM
meter)
2.1.2.2. If no continuity, check fuel pump ground at battery box.
2.1.2.3. If ground at battery box is bad, move wire to an alternate location or scuff metal bare
to establish a good ground connection.
3. Pump is Working
3.1. Engine flooded?
3.1.1. If you have a strong smell of gasoline near the air intake or throttle body, hold the throttle to
the floor and start the engine. The throttle position sensor will recognize full throttle at start
up and the ECU will temporarily stop injecting fuel. The excess fuel should be pulled
through the engine and the car should start.
3.2. Engine is Not Flooded.
3.2.1. Check the harness 12V+ switched power connection at fuse box, position 5.
3.2.2. Check the connection of the two large plastic connectors at the ECU – make sure the plugs
are properly snapped in place.
3.2.3. Check the connection at the t-tap.
3.2.3.1. There should be continuity between the negative terminal of the coil and the female
spade connector part of the t-tap.
3.2.3.2. Check the male spade connector on the white wire that plugs into the T-tap; it the
connector is not crimped onto the wire solidly you may have a loose or intermittent
connection.
3.2.3.3. Check the connection between the male spade on the white wire and the female
spade in the t-tap. You can push them together without the metal pieces actually
touching.
MOSS MOTORS, LTD.
PO Box 847, 440 Rutherford Street, Goleta, California 93117
Toll Free US & Canada (800) 667-7872 FAX (805) 692-2510 (805) 681-3400
Instruction Sheet 772-055 Dec, 05
Page 48 of 52
