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| ECM upgrade (1227730) for stock 2.8 (Page 82/107) |
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Darth Fiero
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NOV 12, 03:35 PM
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| quote | Originally posted by americasfuture2k:
ok, so i am doing a very thorough check on my harness. and checking again and again to make very sure i got everything right. ive already found some mistakes  hurts my ego since i am an electronic tech for the navy. i have a question on a pin.
A7 (Fiero ECM) - tan/blk - TCC / Shift Lamp control - move to - GF6
the TCC only applies to the auto. and shift lamp is for the getrag. should i move the mentioned above wire to the shift lamp pin on the C203? pin A? |
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Yes. But not all manual transmission cars had a shift light -- so this wire may not be present in your car.
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but pin A on the C203 goes to BA9 which is the serial data and on the C203 pin A is the shift lamp control. |
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No. Pin A on the C203 is NOT connected to the serial data circuit. This is the shift lamp wire (if present). On the 7730 ECM, pin GF6 is for TCC/Shift light control. And you would connect this pin on the 7730 ECM to pin A of the C203 only if you have a manual trans and a shift lamp. If you have an auto, this wire coming from GF6 goes to the transmission.
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on the C203 pin P is the TCC Brake Switch feed.
when i do a continuity test to C203 pin A, it goes to pin BA9 AND pin M on the ALDL
AND
when i do a continuity test to C203 pin P, it goes to pin GF6.
im confused on getting a shift lamp now.
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First thing you need to do is verify pin GF6 of the 7730 ECM is connected ONLY TO pin A of the Fiero C203 connector and nothing else ONLY IF you have a manual transmission. If you have an automatic, this wire gets connected to the automatic transmission electrical connector.
Second thing you need to do is verify pin BA9 of the 7730 ECM is connected ONLY TO pin M of the ALDL connector.
Pin P of the Fiero C203 connector gets connected directly to the automatic transmission electrical connector (purple wire) and NOT the ECM. If you do not have an automatic transmission, then this wire gets connected to NOTHING.
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fieroluke
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NOV 13, 06:30 AM
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Hi everyone,
I am still in the process of gathering parts for my conversion.
Now, I was told (when I tried to order it) that the EGR connector pigtail "PT301" is not available from ACDelco. Is that true? It's still listed on their website...
What were you guys using? An aftermarket "Standard" or similar brand, or used from the recycler?
Best regards,
Oliver
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Hudini
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NOV 13, 08:04 AM
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If you can find a recycler with the digital EGR can you grab the pigtail too? Seems that would be the least expensive and fastest route.
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fieroluke
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NOV 14, 04:55 AM
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Hi,
I agree, that would be the easiest route if I was living in the US. However, I am stuck in Europe :-(
Over here US cars in junkyards are scarce to say the least. And I got the EGR valve from eBay, but sadly without a pigtail. Stupid me assumed that if a pigtail is listed at acdelco.com that it is available for purchase and not just displayed for teasing prospective buyers. Oh well.
Best regards,
Oliver
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Darth Fiero
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NOV 14, 12:21 PM
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| quote | Originally posted by fieroluke:
Hi,
I agree, that would be the easiest route if I was living in the US. However, I am stuck in Europe :-(
Over here US cars in junkyards are scarce to say the least. And I got the EGR valve from eBay, but sadly without a pigtail. Stupid me assumed that if a pigtail is listed at acdelco.com that it is available for purchase and not just displayed for teasing prospective buyers. Oh well.
Best regards,
Oliver |
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I have an extra digital EGR pigtail I will give you for free if you pay for shipping. Email me at sp1@gmtuners.com with your shipping address and I'll get you a shipping cost.
-ryan
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americasfuture2k
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NOV 16, 05:54 PM
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well after comparing my harness to the one merlot originally had on the car and the one i got from bubbajuju, mine seems to be a bit off on the wiring. and possibly threw me off on all of this. my harness is said to be from a 86 v6 4spd. from CANADA. so maybe that had something to do with it. but that pin A C203 / ALDL pin M / BA9 wire had a factory splice in it.
both my pin P and pin A on the C203 were wrong. they were swapped. i got it like that.
------------------
First LX9 Fiero GT, 1987
If you can't fix it with a hammer, you've got an electrical problem
Fiero's are people too. We pay just as much attention to them, if not more than our loved ones 
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americasfuture2k
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DEC 02, 01:39 PM
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woo, fuel pump primed! ------------------
First LX9 Fiero GT, 1987
If you can't fix it with a hammer, you've got an electrical problem
Fiero's are people too. We pay just as much attention to them, if not more than our loved ones
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americasfuture2k
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DEC 15, 08:37 PM
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Darth Fiero
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DEC 16, 12:31 AM
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The ignition module on DIS engines will produce spark as long as it is getting power and a valid crank sensor signal, even with the ECM disconnected. If you are not getting spark on a DIS engine, there are only 3 possible problems:
-Bad crank sensor or bad wiring between the crank sensor and module
-No power getting to the ign module
-Bad ign module or bad coils (but all 3 coils would have to be bad for the unit to produce no spark at all with a good module which is unlikely)
NOTE: Early DIS modules did have a relatively high failure rate.
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topher_time
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DEC 17, 12:07 AM
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Darth, sent you a pm about using a substitute for the 1227730 ecm on a 3x00 engine. You're more knowledgeable about it than I am, just want your opinion before ditching the 7730 and using something from megasquirt.
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