WTF is wrong with my EEC??? Need Serious HELP!!(long)

PKRWUD · 10-19-2001, 05:19 AM

Dude. Too bad you don't live closer, I could make some money off you. Okay, there are several things I'm going to cover here, but there is one thing I need you to do first: Disconnect the TPS, and run the KOEO test (with the TPS disconnected). Ignore all codes except a code 63. Let me know if a code 63 comes up.

Second, do you still have your EGR valve installed and hooked up, or was it removed with the other smog equipment?

Third, codes 81, 82 and 85 are due to removed smog equipment. Ignore them.

Fourth, the ECM you are using is from a car with an automatic transmission, so you can also ignore code 67.

Fifth, the orange wire at the 10 pin connector is the ground wire for the oxygen sensors. It needs to be grounded.

Sixth, If you no longer have an EGR valve hooked up to the system, then ignore code 35. If the EGR is still hooked up, see the next paragraph. It shares the same signal return (black) wire.

Okay, now for the rest of it. The ECM is saying that your air temp sensor, your engine coolant temp sensor, your TPS, EVP, and your bp sensor are all not responding. The black wire that goes to the TPS is the same black wire that goes to the above sensors, and it doesn't appear to be connected to the ECM very well. What you are going to have to do is this:
Disconnect the ECM. Find the signal return wire at the harness connector to the ECM. It will be a black wire with a white tracer, and should be in the 6th spot from one end at the plug, give or take a couple spaces. Connect a long wire lead to that pin by piercing the wire with a safety pin and attaching a wire to the safety pin. Run that wire out the door and into the engine compartment. Attach one lead from a DMM that is set to measure ohms, on the 10 scale, to that wire. Go to and disconnect each of the following sensors: ACT, ECT, BP, TPS, and EVP if the EGR valve is still connected. Turn on the DMM (set to ohms). With the other lead from the DMM, touch the pin in each connector that the black wire goes to, and write down the reading that is on the DMM, and post them here. It is very important that you do this exactly as I have instructed you to, and that you correctly tell me the amount of ohms at each sensors black wire.

That should keep you busy for a while. Just remember, NO SHORTCUTS! Do it just like I said, or it will be worthless. You can email me at pkrwuds@pacbell.net if that's easier than doing this here.

Take care,
-Chris

------------------
Retired Moderator
MustangNet

My site: Peckerwoods Pit Stop

My teams site: Jim Porter Racing

RACECAR spelled backwards is RACECAR

HEY !!! Are you ASE Certified ??? If you are, ask me about iATN.

[This message has been edited by PKRWUD (edited 10-19-2001).]

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10-19-2001, 05:19 AM	#5
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Dude. Too bad you don't live closer, I could make some money off you. Okay, there are several things I'm going to cover here, but there is one thing I need you to do first: Disconnect the TPS, and run the KOEO test (with the TPS disconnected). Ignore all codes except a code 63. Let me know if a code 63 comes up. Second, do you still have your EGR valve installed and hooked up, or was it removed with the other smog equipment? Third, codes 81, 82 and 85 are due to removed smog equipment. Ignore them. Fourth, the ECM you are using is from a car with an automatic transmission, so you can also ignore code 67. Fifth, the orange wire at the 10 pin connector is the ground wire for the oxygen sensors. It needs to be grounded. Sixth, If you no longer have an EGR valve hooked up to the system, then ignore code 35. If the EGR is still hooked up, see the next paragraph. It shares the same signal return (black) wire. Okay, now for the rest of it. The ECM is saying that your air temp sensor, your engine coolant temp sensor, your TPS, EVP, and your bp sensor are all not responding. The black wire that goes to the TPS is the same black wire that goes to the above sensors, and it doesn't appear to be connected to the ECM very well. What you are going to have to do is this: Disconnect the ECM. Find the signal return wire at the harness connector to the ECM. It will be a black wire with a white tracer, and should be in the 6th spot from one end at the plug, give or take a couple spaces. Connect a long wire lead to that pin by piercing the wire with a safety pin and attaching a wire to the safety pin. Run that wire out the door and into the engine compartment. Attach one lead from a DMM that is set to measure ohms, on the 10 scale, to that wire. Go to and disconnect each of the following sensors: ACT, ECT, BP, TPS, and EVP if the EGR valve is still connected. Turn on the DMM (set to ohms). With the other lead from the DMM, touch the pin in each connector that the black wire goes to, and write down the reading that is on the DMM, and post them here. It is very important that you do this exactly as I have instructed you to, and that you correctly tell me the amount of ohms at each sensors black wire. That should keep you busy for a while. Just remember, NO SHORTCUTS! Do it just like I said, or it will be worthless. You can email me at pkrwuds@pacbell.net if that's easier than doing this here. Take care, -Chris ------------------ Retired Moderator MustangNet My site: Peckerwoods Pit Stop My teams site: Jim Porter Racing RACECAR spelled backwards is RACECAR HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. [This message has been edited by PKRWUD (edited 10-19-2001).]