1991 GTA, code 53
11-27-2018, 10:05 AM
#1
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Car: Trans Am GTA
Engine: 350
Transmission: Auto
Axle/Gears: 3.23
1991 GTA, code 53
Hope ssomeone can help, having issues with a 91 Trans Am GTA, while driving the ses light comes on, engine runs rough but if I keep revs up it will clear itself the ses goes out and runs normally, if I let revs drop the engine will stall. Engine will restart immediately with no ses and runs normally again, can go for 500-1000 miles before reoccurring. On the rare occasions ses stays on shows code 53. Once the ses light goes off no codes are stored.
11-28-2018, 01:24 PM
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Car: Trans Am GTA
Engine: 350
Transmission: Auto
Axle/Gears: 3.23
Re: 1991 GTA, code 53
New battery and alternator fitted when problem first occurred, I have had system tested recently, all operating perfectly. At the moment it is just a 20-30 second inconvenience every few hundred miles, but would like to fix problem.
11-28-2018, 02:12 PM
#4
Re: 1991 GTA, code 53
My first thought was bad voltage regulator in the alternator.
the code 53 will throw is a high voltage is seen at the ecm for more than 2 seconds.
I wonder if a bad ecm could cause this problem. Since it’s intermittent I don’t know where else to tell you to start.
the code 53 will throw is a high voltage is seen at the ecm for more than 2 seconds.
I wonder if a bad ecm could cause this problem. Since it’s intermittent I don’t know where else to tell you to start.
11-28-2018, 02:23 PM
#5
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Car: Trans Am GTA
Engine: 350
Transmission: Auto
Axle/Gears: 3.23
Re: 1991 GTA, code 53
Me too, that's why I changed battery and alternator, next thought was ECM, unfortunately they're not that easy to get over here.
11-28-2018, 06:43 PM
#7
Re: 1991 GTA, code 53
Here is a application list for your 1227730 ecm assuming you have tpi.
https://www.thirdgen.org/ecminterchange/
https://www.thirdgen.org/ecminterchange/
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11-28-2018, 07:30 PM
#8
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Car: Trans Am GTA
Engine: 350
Transmission: Auto
Axle/Gears: 3.23
Re: 1991 GTA, code 53
Thanks, never thought to look at rockauto, usually the first place I go for parts, not as expensive as I thought, even with core charge.
11-28-2018, 07:51 PM
#9
Re: 1991 GTA, code 53
My first thought was bad voltage regulator in the alternator.
the code 53 will throw is a high voltage is seen at the ecm for more than 2 seconds.
I wonder if a bad ecm could cause this problem. Since it’s intermittent I don’t know where else to tell you to start.
the code 53 will throw is a high voltage is seen at the ecm for more than 2 seconds.
I wonder if a bad ecm could cause this problem. Since it’s intermittent I don’t know where else to tell you to start.
11-29-2018, 06:32 AM
#12
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Car: Trans Am GTA
Engine: 350
Transmission: Auto
Axle/Gears: 3.23
Re: 1991 GTA, code 53
Now you got me thinking, could it be as simple as a bad connection seeing as it is so intermittent and fault only lasts for a few seconds.
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