DTC Code 43??? Datamaster data...
Thread Starter
Pro
Joined: Jun 2001
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From: Florida
DTC Code 43??? Datamaster data...
I just swapped a '95 LT1 into a '76 and am getting Trouble Code 43. What Exactly is this code? AutoXray and Datamaster each give the description as Electronic Spark Control failure, while the Helm's manual lists it as a Knock Sensor problem.
I followed the DCT 43 Flow chart in the Helms and all checked-out fine: Voltage was 4.75 (s/b about 5, if above 5.5 or @0, then there were more tests), Ohms was 4000 (s/b 3300 - 4500), so all look good. Im using an F-body PCM and wiring harness designed for this setup, so there's only 1 Knock Sensor used.
WHAT is Electronic Spark Control failure? Bad Opti, Coil, KS???
Datamaster immediately set code 43 (within 1st second of run) Knock Count started at over 8,000, jumped again to 10,000 where it stayed for about a minute, then jumped again to 15,000+ then started over. Knock Retard was never less than 14, and Spark Advance was 0' (but had 5 spikes of 255') until the last few seconds of run, which were from 10 - 12'. This whole run was just over a minute.
I'm still "old school", where a turn of the distributor and the idle mixture screws usually got ya goin!
Ideas / Suggestions??
HUGE thanks! :yesnod:
Donovan
I followed the DCT 43 Flow chart in the Helms and all checked-out fine: Voltage was 4.75 (s/b about 5, if above 5.5 or @0, then there were more tests), Ohms was 4000 (s/b 3300 - 4500), so all look good. Im using an F-body PCM and wiring harness designed for this setup, so there's only 1 Knock Sensor used.
WHAT is Electronic Spark Control failure? Bad Opti, Coil, KS???
Datamaster immediately set code 43 (within 1st second of run) Knock Count started at over 8,000, jumped again to 10,000 where it stayed for about a minute, then jumped again to 15,000+ then started over. Knock Retard was never less than 14, and Spark Advance was 0' (but had 5 spikes of 255') until the last few seconds of run, which were from 10 - 12'. This whole run was just over a minute.
I'm still "old school", where a turn of the distributor and the idle mixture screws usually got ya goin!
Ideas / Suggestions??
HUGE thanks! :yesnod:
Donovan
Le Mans Master
Joined: Oct 2000
Posts: 6,362
Likes: 30
From: Oak Harbor WA
Re: DTC Code 43??? Datamaster data... (STL94LT1)
You sure you have the knock sensor connected properly? The ECM controls the ESC circuit. Also, I thought there were two knock sensors? Is the 95 completely stock?
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Pro
Joined: Jun 2001
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From: Florida
Re: DTC Code 43??? Datamaster data... (Goody)
Yes, the Vette LT1 *should* be using two knock sensors, but since I'm using an F-Body PCM, there's only wiring going to one. All are in a '76 body.
As far as mods, haven't done too much...Headers, 1.6RR, very mild porting of the heads, Impala head gaskets, MSD 8.5 wires.
Back to the KS's...how do you get these bastards out? The "nut" on the end is tapered so the socket doesn't get a good grip and slips off. Any suggestions?
Thanks! :cheers:
Dr.
As far as mods, haven't done too much...Headers, 1.6RR, very mild porting of the heads, Impala head gaskets, MSD 8.5 wires.
Back to the KS's...how do you get these bastards out? The "nut" on the end is tapered so the socket doesn't get a good grip and slips off. Any suggestions?
Thanks! :cheers:
Dr.
Racer
Joined: Apr 2001
Posts: 282
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Cruise-In IV Veteran
Re: DTC Code 43??? Datamaster data... (DR'76)
Had the same code i replaced both k.s'rs and code never came back
if you can't get them off with a wrench or socket put a pair of plier's on
the outside of k.s and try to turn it loose be careful cause coolant
will dump out fast!
Good Luck!
if you can't get them off with a wrench or socket put a pair of plier's on
the outside of k.s and try to turn it loose be careful cause coolant
will dump out fast!
Good Luck!
