1997 Suzuki Swift no power to fuel injecter

BARNY94

MEMBER
1997 SUZUKI SWIFT
4 CYL
2WD
AUTOMATIC
190,000 MILES

Checked the injecter with a noid light and get no power. All fuses seem to be fine!Got gas right up to the throttle body but no further. Put a little gas in the throttle body and starts right up. Was running great till it suddenly stopped. Wonder what sends power the fuel injecter? Who to get trouble code?

Thanks

1 Reply

DAVE H

MECHANIC
13,384 POSTS

Have the vehicle plugged into diagnostic computer to retrieve fault codes most repairs centres will do this for you

Fuel Injector(s)
Vehicles use Throttle Body Injection (TBI), which incorporates a single fuel injector in the throttle body unit.
When solenoid coil of fuel injector is energized by PCM, coil becomes an electromagnet. See Fig. 1. This lifts injector plunger, allowing fuel under pressure to be injected into intake manifold. Since fuel pressure is relatively constant, air/fuel mixtures are controlled by injector pulse width ("on" time). PCM determines proper pulse width based upon input signals received from various sensors and switches.
Fuel injector triggering and timing is determined by PCM based upon ignition signals from Camshaft Position (CMP) sensor. Since PCM interprets CMP sensor signal as an indication of spark presence, fuel injector triggering will cease if CMP sensor signal is lost.