2000 Pontiac Grand Am electrical fuel injector wiring harness

DEENAGEL

MEMBER
2000 PONTIAC GRAND AM
2.4L
4 CYL
FWD
AUTOMATIC
141,000 MILES

I was getting a code p0201 and p0202, but car WAS running fine. I decided to look at the wiring harness to the injectors and found that the wiring had been tampered with. I replaced the portion of wiring harness just for the fuel injectors. The wires all matched to the wires coming from the vehicle except for the gray wires coming from the fuel injectors going to the fuel pump relay. So there are 4 gray wires and they all look the same. I hooked them up as best I could match them and put everything back together. BTW when I pulled the plugs on injector 1 and injector 2 the engine sounded the same. So, lastly I replaced the fuel injectors for cylinder 1 and cylinder 2 and now the car won't even start. I am still getting a p0201, p0202 and now a p0300

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

Okay, I am looking at a schematic for the injectors. Each one has two wires.

Inj 1 Pink and Black
Inj 2 Pink and Lt. Green / Black
Inj 3 Pink and Lt Blue / Black
Inj 4 Pink and Pink / Black

There are no wires going to the injectors that I see which are gray. Since disconnecting the injectors made no difference, they couldn't have been working.

Tell me, the OEM injectors, do they have a gray wire from each too, or is it just the new ones you got? Also, tell me if you have a noid light.

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Tuesday, June 30th, 2015 AT 8:09 PM

DEENAGEL

MEMBER
2 POSTS

The oem injectors have been tampered with. There is one wire going to injector #1 and one wire at injector #4, #2 and #3 have been tampered with as well. The color of the hot wire is all 4 gray on mine and all 4 pink on the schematic. I guess what I am wondering is how do you match pink to pink and get each pink right? I do not have a noid light but can pick one up in the morning.

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Tuesday, June 30th, 2015 AT 8:55 PM

JACOBANDNICKOLAS