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

Mysterious code 42 ?!?!

Thread Tools
 
Search this Thread
 
Old Mar 14, 2003 | 03:03 AM
  #1  
V8Astro Captain's Avatar
Thread Starter
Supreme Member
iTrader: (1)
 
Joined: Jun 2001
Posts: 1,520
Likes: 0
From: 600 yds out
Car: Bee-Bowdy
Engine: blowd tree-fity
Transmission: sebin hunnerd
Axle/Gears: fo-tins
Mysterious code 42 ?!?!

So I'm out cruisin having a good ole time. While I'm going around a cloverleaf on the highway the engine bogs real hard and the SES light comes on (7747 here).

So I click to the Error Codes tab on WinALDL and the only code in there is code 42 EST. WTF?

I've had the battery disconnected since the last time I set the timing so I'm sure that it was this occurance that set the light off.

After the code was set, the light stayed on and the engine continued to run badly...like there was no SA.

I pulled over and shut the engine down. Waited a sec, and fired it back up. The SES light was off and everything ran like before. I guess once the code was set the ECM stopped using the SA tables in the PROM.

I got this from my ARJU hack...
Code:
		;---------------------------------------------
        ; ERROR 42
        ; EST MONITOR
		;---------------------------------------------
LD546   FCB  4  	; 450 RPM limit, 
LD547   FCB  0  	; Num PA1 cnt's for error
LD548   FCB  4  	; Num of EST faults for 42A
LD549   FCB  4  	; Num of EST faults for 42B
		;---------------------------------------------
I get the 450 rpm limit but after that the rest means nothing to me.

Maybe I need to check the EST connector?
Reply
Old Mar 14, 2003 | 08:09 AM
  #2  
Grumpy's Avatar
Supreme Member
 
Joined: Jun 2000
Posts: 7,554
Likes: 1
From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Try another chip.
Yes, the actual prom.
I've seen 747s, and 148s pop a 42 intermittently.
Actually 4 times.

I think on the 747 I also disabled the 42 flag.
Reply
Old Mar 14, 2003 | 12:40 PM
  #3  
V8Astro Captain's Avatar
Thread Starter
Supreme Member
iTrader: (1)
 
Joined: Jun 2001
Posts: 1,520
Likes: 0
From: 600 yds out
Car: Bee-Bowdy
Engine: blowd tree-fity
Transmission: sebin hunnerd
Axle/Gears: fo-tins
I'll do that.

I know some of the junkyard chips I have will erase and program fine...but sometimes they will throw a code 51. The chip "looses contact" with the ECM...that's no fun in traffic.
Reply
Old Mar 14, 2003 | 03:34 PM
  #4  
Grumpy's Avatar
Supreme Member
 
Joined: Jun 2000
Posts: 7,554
Likes: 1
From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Originally posted by V8Astro Captain
I'll do that.

I know some of the junkyard chips I have will erase and program fine...but sometimes they will throw a code 51. The chip "looses contact" with the ECM...that's no fun in traffic.

I gave up using junkyard chips for that and the sometimes hassle of getting them to erase.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
89-IROCZ-5.0TPI
TPI
10
Feb 22, 2022 09:26 PM
Falcon50
DFI and ECM
81
Aug 22, 2020 03:26 PM
racereese
Tech / General Engine
14
Oct 3, 2015 03:46 PM
Luigytico09
TPI
0
Oct 1, 2015 08:46 AM
Gordonr1973
Electronics
0
Sep 29, 2015 11:59 AM




All times are GMT -5. The time now is 10:59 AM.