I am going to be swapping out my L69 for an 89 305 TPI. The engine is complete although it doesn't come with anything other than what's on the block. I know I need the fuel pump, MAF sensor, air box, wiring harness, and ECM.

My questions are...

1. In 89' they eliminated the cold start injector. Can I still use a prior years wiring harness or does it have to be specifically for an 89'?

2. In 89' all memcals were programmed for VATS but still carried the same part number (1227165) can I use a previous years ECM to eliminate VATS or do I have to use an 89' ECM and get a VATS eliminated chip?

3. Can anyone tell me what else I am going to be looking into when I start this project?

I'm on a limited budget. I would like to have an L98 but this was practically given to me and my L69 died so I figured on upgrading later. I would also like to go with the painless wiring but cant afford it right now. There are a million things that would probably make the job easier but I can't afford it. My Camaro is my camaro and not going anywhere so buying a new one is out.

Thanks for any help you can give.

BOZ

 

You should do alot of research before doing this swap, if not done properly you will be WAY over budget very quickly. That said you need an '89 wiring harness, you should not need a MAF as Im pretty sure '89 was the first year for speed density, all sensors, you should have a custom computer and ecm that will by-pass vats (this is the easy but more costly way to get around vats). Im not positive if you could use a stock '89 computer because of the system being a speed density.
The best investment you could make is to search these threads and really research this. I wish I would have known about this site and thirdgen.org before starting mine, I would have saved an awful lot of time and money.

 

89 was the changeover years for alot of stuff]

88 had MAF, cold start inj., no VATS
89 had MAF , no cold start Inj. and VATS
90 had SD, no cold start inj., and VATS

if you want to use a cold start inj., use a 88 PROM
so to do away with the cold start inj., you need a 89 PROM with VATS removed
if you want speed density, use a 90-92 PROM w/VATS deleted, and the correct harness(or mod the MAF harness)

 

fuel is going to be a major issue,

you need a return line plus you mian line need to be high pressure,

and you'll need the FI tank so you get an intank pump,

harness as long as its 86-89 you'll be fine, just leave the cold start wire hanging

if you don't have a cold start injector you'll need an 89 chip,
its easy to have a new chip burned and have the VATS elimnated,

the vehicle harness side of the ecm might be an issue,

you could just put your fuel pump on a switch, also acting as an anti theft device,

I'll post some more info when I get home, got a boat load of wiring info at home on my desktop

 

Thanks for all your help. 89VERT I would greatly appreciate the info when you get a chance.

BOZ

 

I'll post the stuff as soon as I get a chance,
just been busy the pst couple days

 

Circuit Pin Wire Color* V. Key "on" V. Engine run

Fuel pump rly A1 Grn/wht 0 (a) 13.9
Port air switch A2 Brn 12 13.9
Canister purge A3 Grn/Yel 12 0
EGR control A4 Gry 12 0
SES control A5 Brn/Wht 0 13.9
IGN, power A6 Pnk/blk 12 13.9
M/T od, or A/T TCC A7 Tan/Blk 12 13.9
Serial data A8 Org 2-5V (varies) 2-5V (varies)
Diagnostic term A9 Wht/Blk 5 5
Speed sensor A10 Brn (b) (b)
MAF analog grd return A11 Blk/Pnk 0 0
System ground A12 Blk/Wht 0 0

Battery 12V B1 Org 12 13.9
Fuel pump sig B2 Red 0 13.9
EST ref. low B3 Blk/Rd 0 0
Not Used B4 --------------- --------------- ---------------
Distributor ref. B5 Ppl/Wht 0 1.5
VATS signal B6 Wht 2.5 2.5
ESC signal B7 Blk 9.2 9.3
A/C signal B8 Grn/Yel 0V off 12V on 0V off 12V on
Not Used B9 --------------- --------------- ---------------
P/N switch B10 Org/Blk 0V P/N 12V D 0V P/N 12V D
Not Used B11 --------------- --------------- ---------------
MAF sensor in B12 Dk. Grn 2.5 .4-1.0 (c)

Fan rly cntrl C1 Dk. Grn/Wht 12 13.9
Converter air cntrl C2 Blk/Pnk 12 0
IAC "B" low C3 Lt. Grn/Blk not useable not useable
IAC "B" high C4 Lt. Grn/Wht " " " "
IAC "A" high C5 Lt. Blu/Wht " " " "
IAC "A" low C6 Lt. Blu/Blk " " " "
A/T OD switch C7 Blk/Blu 12 13.9
M/T OD req. C8 Blk/Blu 0 0
Not Used C9 --------------- --------------- ---------------
Coolant temp signal C10 Yel 1.6(d) 1.6 (d)
Not used C11 --------------- --------------- ---------------
MAT signal C12 Dk. Grn (e) (e)
TPS signal C13 Dk. Blu .54V+-.05V .54V+-.05V
TPS 5V ref C14 Gry 5 5
EGR temp sw. C15 Drk. Grn 12 13.9
Battery C16 Org 12 13.9

System grd D1 Blk/Wht 0 0
CTS, MAT, TPS 5V return D2 Blk 0 0
System grd D3 Blk/Wht 0 0
EST control D4 Wht 0 1.3
EST Bypass D5 Tan/Wht 0 4.75
Grn'd D6 Tan 0 0
O2 sensor sig. D7 Ppl (f) (f)
Not Used D8 --------------- --------------- ---------------
Not Used D9 --------------- --------------- ---------------
System Grd D10 Blk/Wht 0 0
A/C Press. Fan switch D11 Drk. Grn 0 0
MAF burn off relay D12 Blk 12 13.9
Not Used D13 --------------- --------------- ---------------
Not Used D14 --------------- --------------- ---------------
Inj.1-3-5-7 D15 Lt. Blu 12 13.9
Inj. 2-4-6-8 D16 Lt. Grn 12 13.9
Notes: (a) 12V first 2 seconds with ign. in "on" position. (b) Varies between .60V and 12V depending on position of drive wheels. (c) varies with air flow into MAF sensor (d) At normal operating temperature. (e) varies with temperature (f) varies, averages 0.45V.


A and B are vehicle harness





I'll see what else I can dig up on my hard drive here

 

talk to mike@eficonnection.net

he converted my harness for me and did an awesome job.....the price is fair too

im sure he would be able to help you with any wiring you are dealing with