I need help finding parts but don't know what I need, since I got a job so I can now start buying parts.
First need both decklid vents. The ones for the SE that I find online are just metal mesh, while the GT ones are proper looking vents. Are the SE vents just a metal mesh or am I missing something. below are 2 photos from online of the vents.
I also need what I think is the ECU or ECM. It the big box computer for the engine that is inside of the center console between the 2 seats. I have no idea what exact model I need. The car has a V6 engine.
First need both decklid vents. The ones for the SE that I find online are just metal mesh, while the GT ones are proper looking vents. Are the SE vents just a metal mesh or am I missing something. below are 2 photos from online of the vents.
Don't specifically look up for se Fieros, there are 4 different styles of decklid vents, 84 solid plastic, 85 (notchback only and much much thicker and heavier duty than later ones) 86+ notchback (what your looking for) and 86+ fastback (your pictured "GT" one).
All notchback vents have the pictured metal mesh underneath, but the whole vent itself is different than the 86+fastback vents, the notchback ones are indeed just a "square", but look similar to the pictured "GT" vent.
Don't specifically look up for se Fieros, there are 4 different styles of decklid vents, 84 solid plastic, 85 (notchback only and much much thicker and heavier duty than later ones) 86+ notchback (what your looking for) and 86+ fastback (your pictured "GT" one).
All notchback vents have the pictured metal mesh underneath, but the whole vent itself is different than the 86+fastback vents, the notchback ones are indeed just a "square", but look similar to the pictured "GT" vent.
I just want to double check something. the link you sent me is for a 85. are you sure a 85 would fit my 86. just double checking so i dont waste money. also do you know what ecm i need. i think its the ecm but im not to sure
[This message has been edited by Carlin (edited 10-15-2025).]
I just want to double check something. the link you sent me is for a 85. are you sure a 85 would fit my 86. just double checking so i dont waste money. also do you know what ecm i need. i think its the ecm but im not to sure
The only difference in the back decklid vents is the construction, they are all cross compatible, just not the fastback ones. The 85 ones are stronger though.
Don't specifically look up for se Fieros, there are 4 different styles of decklid vents, 84 solid plastic, 85 (notchback only and much much thicker and heavier duty than later ones) 86+ notchback (what your looking for) and 86+ fastback (your pictured "GT" one).
All notchback vents have the pictured metal mesh underneath, but the whole vent itself is different than the 86+fastback vents, the notchback ones are indeed just a "square", but look similar to the pictured "GT" vent.
The notchback vents featured two styles of under-vent grating - the mesh that you have pictured as well as a "cheese grater" style.
The 88 notchback vents had 2 inboard hold down holes, so they would fit pre-88 and 88 models.
I have not noticed any difference in the 85 notchback castings as far as thickness or weight compare to 86-87.
I thought the center one was magnesium and the outer solid was plastic, good to know.
My 85 had the honeycomb, my dad's 86 has the cheese grater style, my 85 is solid and would be more than strong enough to stand on, my dad's 86 vents, the individual louvers can be flexed fairly easily by hand.
Charlie, I think you're correct. I remember hearing or reading that sometime in the last 31 years of Fiero ownership and wrenching on them. I think they went to aluminium for the 86 model year.
so i looked at the sheet. how do i find the PROM number i need. there is a bunch of them that dont seem to connect to anything
They all connect in horizontal rows, you start from the left, and pick what you have based on the options, then move right in that column to the next set of options, v6 or l4, then is it 84,5,6,7, or 88, then is it an automatic, 4 speed or 5 speed, then what size tires if applicable, then was it sold in California, or everywhere else in the US/Canada. Once you go through that, you'll have 2 numbers, the ECM number (which is the same for 86-8, hence it being less important), and the prom number (the actual chip inside the ECM that has parameters that must match the engine and transmission that you have)
They all connect in horizontal rows, you start from the left, and pick what you have based on the options, then move right in that column to the next set of options, v6 or l4, then is it 84,5,6,7, or 88, then is it an automatic, 4 speed or 5 speed, then what size tires if applicable, then was it sold in California, or everywhere else in the US/Canada. Once you go through that, you'll have 2 numbers, the ECM number (which is the same for 86-8, hence it being less important), and the prom number (the actual chip inside the ECM that has parameters that must match the engine and transmission that you have)
I think i have the prom but how do i find a ecm with that prom. Ive been looking on ebay but everybody only labels the ecm number and not the prom number that is in it.
Some eBay sellers won't say the PROM {you need to ask} Some sell the computer without the PROM {you need to buy the PROM separate} Some will show the computer for "Engine/Transaxle" Some show "Computer 1227170 AKYN" which AKYN is the PROM
GM sells remanufactured computers separate from the PROM
[This message has been edited by Vintage-Nut (edited 10-17-2025).]
I think i have the prom but how do i find a ecm with that prom. Ive been looking on ebay but everybody only labels the ecm number and not the prom number that is in it.
Originally posted by Carlin: so i looked at the sheet. how do i find the PROM number i need. there is a bunch of them that dont seem to connect to anything
Some eBay sellers won't say the PROM {you need to ask} Some sell the computer without the PROM {you need to buy the PROM separate} Some will show the computer for "Engine/Transaxle" Some show "Computer 1227170 AKYN" which AKYN is the PROM
GM sells remanufactured computers separate from the PROM
btw I have been asking. nobody seems to know what the prom is. I've been telling them its the chip inside. Is there a way to find it without taking it apart since I know a lot of sellers don't want to just start taking things a apart and risk breaking them.
hey guys so got some good new. believe I found some decklids. a bit pricy but they are hard o find.
i also might of found a ecm but need help double checking it.
so the guy took the cover off and to the right of the barcode is a white chip that says FBA, mine is FBA1819. i feel like its the right one but just making sure before i buy it
Originally posted by Carlin: ... to the right of the barcode is a white chip that says FBA, mine is FBA1819. i feel like its the right one but just making sure before i buy it
One and the same. You should be good to go. Provided that you have an automatic. (I just looked back through the thread, and didn't see any mention of what trans you have.)
[This message has been edited by Raydar (edited 10-24-2025).]
One and the same. You should be good to go. Provided that you have an automatic. (I just looked back through the thread, and didn't see any mention of what trans you have.)
I have a auto. will be buying it. hopefully the car is running soon
