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malfunction code 51

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Velon

Member
Joined
Dec 14, 2003
Messages
291
My 87 gn keeps getting a code 51 and idling very rough or going dead and starting back after resetting the computer. the turbo tweak chip is very new so I don't think its that. The ecm is original so I figure its that since a code 51 is primarily ecm or prom related. I just didn't want to buy a ecm if that's not it, anybody experience this?thanks
 
My 87 gn keeps getting a code 51 and idling very rough or going dead and starting back after resetting the computer. the turbo tweak chip is very new so I don't think its that. The ecm is original so I figure its that since a code 51 is primarily ecm or prom related. I just didn't want to buy a ecm if that's not it, anybody experience this?thanks

It is super easy to bend a pin when inserting the prom chip.....

I would recommend pulling the prom chip and verifying none of the pins are bent.
 
I had the same code come up on mine. I cleaned and checked all the pins and and cleaned them with a pencil eraser. Ended up being the ECM anyway. It was original to the car so I wasn't surprised.
 
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