1987 Chevy S-10 throtle body fuel injection unit

1987 CHEVROLET S-10
185,000 MILES • 6 CYL • 4WD • MANUAL
Avatar
LUCKYFREEMAN69
  • MEMBER
  • 1 POST
Well its me again and I just need to know on the 2.8 tbi engine cheve puts in thier s10's if there are 2 wires on each of the 2 injectors and 1 of those wires lights the test light but does not spray fuel. That would probably mean the other wire is the ground. Now I was wondering if anybody knew which wire is the constant and which has the pulse on it if the positive side is constant then the negative ground would have to pulse to turn the injector on and off however I would have to know which 1 is supposed to pulse. The fuel does not spray from either injector. but the fuel pump is defineately pumping the fuel into the throttlebody injector unit. How can I find a place where I can get a signal from that will turn the injectors on and off like they are supposed to be done????
Jul 28, 2010 at 2:12 PM
Advertisement
Avatar
RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
The pink and black is the power source and the light blue is the driver circuit
Jul 28, 2010 at 4:16 PM