ECM upgrade (1227730) for stock 2.8 (Page 71/107)
Darth Fiero SEP 01, 11:19 PM

quote
Originally posted by Madess:

Darth, I finally got my 7730 conversion done with your chip (my fault I took so long, not yours). I am having some issues with WOT, which I use a lot because I am a psycho. Could I come up one day and have you tune the car? Do you have time, or should we do the remote thing, and I send you some number. If you would rather take this off list, just use my list email and let me know.

Thanks.



Please contact me via email about this issue at sp1@gmtuners.com

thanks.

-ryan
87_special SEP 02, 01:04 AM
I'm having problems wiring my cooling fan to be controlled by the ecm. I ran a wire from GE8 pin to D1 Cooling fan request (c500) wire like the instructions said. My fan still didnt work so I just hooked the fan request wire to a toggle switch and grounded the other side to complete the circuit. This seems to work for now but I'd like the ecm to control the fan.

So my question is: Did I wire something incorrectly? Does the GE8 pin on the 7730 provide voltage or ground. I'd really like to figure this out. Everything else works like it should and the car runs great. The coolant temp guage even works.

-Joseph
Darth Fiero SEP 02, 01:59 AM

quote
Originally posted by 87_special:

I'm having problems wiring my cooling fan to be controlled by the ecm. I ran a wire from GE8 pin to D1 Cooling fan request (c500) wire like the instructions said. My fan still didnt work so I just hooked the fan request wire to a toggle switch and grounded the other side to complete the circuit. This seems to work for now but I'd like the ecm to control the fan.

So my question is: Did I wire something incorrectly? Does the GE8 pin on the 7730 provide voltage or ground. I'd really like to figure this out. Everything else works like it should and the car runs great. The coolant temp guage even works.

-Joseph



GE8 on the 7730 ECM is the cooling fan relay control driver; the ECM GROUNDs this circuit to turn the relay/fan on.

If you ground the wire you ran out to terminal D1 of the C500 connector and the fan comes on, but won't come on when hooked to the ECM, then either you have a connection problem at the ECM electrical connector, the ECM itself is bad, or the ECM isn't actually commanding the fan to turn on (due to not high enough coolant temperature read, coolant temp sensor issue, something in the chip programming, etc etc etc).

NOTE: the ECM may not command the radiator fan on unless the engine is running; but IIRC, these computers should activate the coolant fan to run with the key on but engine off if you short terminals A and B of the ALDL connector (like you would do to flash trouble codes thru the check engine light). If you short the ALDL and the fan runs, then the ECM's fan output driver is working and something else is causing the ECM not to activate the fan relay when you want it to.
3.6lvvt6spdgt SEP 02, 05:24 AM
hey i found a C500 diagram its the connector next to the stock battery location.

[This message has been edited by 3.6lvvt6spdgt (edited 09-02-2008).]

3.6lvvt6spdgt SEP 02, 05:26 AM
so i wire my shift light to the white wire in C3 on the C500?
Darth Fiero SEP 02, 01:06 PM

quote
Originally posted by 3.6lvvt6spdgt:

so i wire my shift light to the white wire in C3 on the C500?



If you have an aftermarket shift light that works off a stock GM type tach signal then YES.
3.6lvvt6spdgt SEP 02, 09:17 PM

quote
Originally posted by 3.6lvvt6spdgt:

so i wire my shift light to the white wire in C3 on the C500?


is this the same white wire going into the coil?
3.6lvvt6spdgt SEP 02, 09:48 PM
found another diagram for us that go ummmmm do i cut this one???

you can remove the cold start and the fan swich. after the 7730 swap.

[This message has been edited by 3.6lvvt6spdgt (edited 09-02-2008).]

Darth Fiero SEP 03, 02:47 PM

quote
Originally posted by 3.6lvvt6spdgt:

is this the same white wire going into the coil?



YES
3.6lvvt6spdgt SEP 08, 12:52 AM

quote
Originally posted by Darth Fiero:
You can put the single wire weatherpak connector in the bypass wire out by the distributor or inside the car by the ECM; your choice. Just remember it needs to be disconnected when you set base distributor ignition timing (puts ECM in set timing mode). Now if you are going to put this connector inside the car near the ECM, then you don't need a weatherpak connector; you could just use male/female blade connectors that can be crimped on which can be purchased at any auto parts store. I strongly recommned the use of sealed weatherpak connectors in the engine compartment to keep the connection from corroding since it will be exposed to the elements out there.

Concerning the knock sensor, if you read my wiring instructions it will tell you that you can actually use one of the Fiero EGR wires for this circuit and just tap into that wire out in the engine compartment to run down to your knock sensor -- will save you the trouble of having to add another wire to the harness. You will end up doing the same for another Fiero EGR wire to hook up the cooling fan to ECM control (also explained in the wiring instruction .pdf).

If you do this swap and don't use the digital EGR and don't hook up the electronic EVAP control solenoid, you should still end up having to add about 2 ground wires to the existing Fiero wiring harness. These two additional grounds are INJECTOR DRIVER grounds that connect the ECM to the engine block. Somebody earlier in this thread did this swap and forgot to hook these additional grounds up which resulted in a NO START condition. So make sure you don't skip this step or you will have issues.

-ryan



OK what wire by the distributor im not sure what wire i need to put the weather pac on. any one with a picture?