1992 ranger

[cec330]

I've got a 92 ranger 4.0 liter v 6. A noid test on the 3 injectors on the drivers side confirmed there is now power to them. I cant find any burnt wires in the harness and cant find any bad grounds. Does this probally mean a bad main computer???

[jonmark1985]

I'm doubting that the computer is bad. Three of the injectors will have a red and tan wire on them, while the three other injectors will have a red and white wire on them. I'd bet the three injectors will have the same colored wires.

If the wires are tan on the injectors that aren't firing you should check the continuity between the tan wires on the injectors and pin number 58 on the ECM's harness. For the white wires check pin 59.

[cec330]

I'll check that out thank you very much

[cec330]

I am not really good with electrical drawings but I am assuming if one wire has no continuity (wether it is tan or white) they all will have no continuity?? And check as close to the injector as possible right!!!

[jonmark1985]

Well it depends on where the break is. If the wire is broke before the injectors run together then that individual injector won't fire. If the break is after the point where the three wires branch together all three injectors won't fire.

I'd first check at the injectors. If they all three don't show continuity then check where the wires branch together.