DIY PROM Do It Yourself PROM chip burning help. No PROM begging. No PROMs for sale. No commercial exchange. Not a referral service.

Cheap Remote PROM solution

Thread Tools
 
Search this Thread
 
Old Jun 17, 2019 | 10:34 AM
  #1  
aseychell's Avatar
Thread Starter
Senior Member
 
Joined: Jun 2016
Posts: 520
Likes: 28
From: Malta
Car: 1988 Trans AM GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 9-Bolt 3.27
Cheap Remote PROM solution

Wanted to share with you guys what I did to be able to swap PROMS without leaving the ECM hanging from under the dash.

Very simple. Just a few cuts to the ECM chassis with a hacksaw, a Moates G1 (I had a JET one which is the same), a Moates Extender cable and a Moates Chip Extender.

Now I can mount the ECM back in its original location and just have the extender board out. If I want to take the extra mile, I can also remove the DIN chip carried and solder a ZIF socket but anyway I dont fiddle around that much with tunes once I got the right one.

Ribbon cable passing under one of the main connectors

Ribbon cable passing under the PCB

Finished Product
Reply
Old Jun 18, 2019 | 12:37 AM
  #2  
GeneralDisorder's Avatar
Supreme Member
5 Year Member
Liked
iTrader: (1)
 
Joined: Mar 2017
Posts: 4,255
Likes: 427
From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: Cheap Remote PROM solution

You best wrap that in tin foil. The chips signals are very low voltage and are susceptible to EMI/RFI. I have had problems with the AutoPROM and ribbon cable interference.

GD
Reply
Old Jun 18, 2019 | 02:01 AM
  #3  
aseychell's Avatar
Thread Starter
Senior Member
 
Joined: Jun 2016
Posts: 520
Likes: 28
From: Malta
Car: 1988 Trans AM GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 9-Bolt 3.27
Re: Cheap Remote PROM solution

You mean the ribbon cable? I think it should be grounded also no?
Reply
Old Jun 18, 2019 | 10:02 AM
  #4  
GeneralDisorder's Avatar
Supreme Member
5 Year Member
Liked
iTrader: (1)
 
Joined: Mar 2017
Posts: 4,255
Likes: 427
From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: Cheap Remote PROM solution

I just wrapped in tin foil. I didn't ground the foil. Worked fine for me - stopped it from randomly stalling when the interference got bad.

GD
Reply
Old Jun 20, 2019 | 08:38 PM
  #5  
Six_Shooter's Avatar
Moderator
20 Year Member
iTrader: (2)
 
Joined: Mar 2006
Posts: 4,370
Likes: 18
Car: 1973 Datsun 240Z/ 1985 S-15 Jimmy
Engine: Turbo LX9/To be decided
Transmission: 5-speed/T-5
Axle/Gears: R200 3.90/7.5" 3.73
Re: Cheap Remote PROM solution

That Chip Extender has virtually zero issues with EMI, except around very, very strong signals. Those chips on a PCB are signal amplifiers, which combat any interference.
Reply
Old Jun 20, 2019 | 10:47 PM
  #6  
ULTM8Z's Avatar
Supreme Member
20 Year Member
 
Joined: Jan 2003
Posts: 4,627
Likes: 313
Re: Cheap Remote PROM solution

Does this come with the ribbon cable?

http://www.moates.net/chip-extender-....html?cPath=26
Reply
Old Jun 20, 2019 | 11:37 PM
  #7  
aseychell's Avatar
Thread Starter
Senior Member
 
Joined: Jun 2016
Posts: 520
Likes: 28
From: Malta
Car: 1988 Trans AM GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 9-Bolt 3.27
Re: Cheap Remote PROM solution

@sixshooter. That is actually my reasoning for using that board instead of a simple chip carrier. Anyways if I see strange behavior I will put some grounded aluminum foil. Thanks

Re parts you will need 1x CHIPEXT ( the board) and 1x EMUC2818 (the cable)
Reply
Old Jun 27, 2019 | 10:27 AM
  #8  
GeneralDisorder's Avatar
Supreme Member
5 Year Member
Liked
iTrader: (1)
 
Joined: Mar 2017
Posts: 4,255
Likes: 427
From: Portland, OR
Car: 86 Imponte Ruiner 450GT, 91 Formula
Engine: 350 Vortec, FIRST TPI, 325 RWHP
Transmission: 700R4 3000 stall.
Axle/Gears: 9 Bolt Torsen 3.70
Re: Cheap Remote PROM solution

Originally Posted by Six_Shooter
That Chip Extender has virtually zero issues with EMI, except around very, very strong signals. Those chips on a PCB are signal amplifiers, which combat any interference.
That's good to know! I definitely had problems with the AutoProm ribbon cable that were solved with the tin-foil. I guess it doesn't have as much signal amplification?

GD
Reply
Old Jun 27, 2019 | 03:02 PM
  #9  
aseychell's Avatar
Thread Starter
Senior Member
 
Joined: Jun 2016
Posts: 520
Likes: 28
From: Malta
Car: 1988 Trans AM GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 9-Bolt 3.27
Re: Cheap Remote PROM solution


Well to be honest I still followed General Disorder advise and covered it in tin foil + pinched part of it to the ECM body making sure there is continuity to ground.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ghettocruiser
LTX and LSX
19
Jan 25, 2017 09:06 PM
LittleNo
DIY PROM
3
Oct 23, 2006 10:19 AM
seanof30306
Body
3
Dec 12, 2005 08:32 PM




All times are GMT -5. The time now is 08:13 AM.