New ECM installed starts and runs terrible NEED HELP!!!!!

[Eluder-Racing]

so I have a 86 GN factory ECM car sits in the garage most of the time hardly ever driven started and pulled the car out and was letting it run to warm up etc... while I cleaned the garage. long story short it ended up dying no fuel pressure found one of the pins on the original ECM broken off from corrosion. I ended up ordering one online it arrived with no chips installed so I had to install my chip and a smaller chip off to the side. installed into car and it started runs terrible won't idle. 2 things I have noticed I have a check engine light all the time and I also have a scan master gen 2 the round style and all the values on it are zero. when I turn the key on it says linking and it synchs up with the car but when I start the car all values are zero???? so im at a loss im thinking a bad connection or something with the factory plugs that connect to the ECM but I wasn't sure. I made sure the chips are in all the way and I also made sure the broken off pin is removed from the harness so those have been done? is there a relearn or something I need to do or a programing process I need to do with this new ECM. I got it thru auto zone its a cardone A1 brand.

 

[Chuck Leeper]

one of the pins on the original ECM broken off from corrosion.

If the ecm side is corroded, most likely so are they in the plug.

 

[TTA308]

Did you disconnect the orange wire and forget to reconnect? Personally i have never had any luck with a repop ECM, plenty of originals still out there.

 

[Eluder-Racing]

Did you disconnect the orange wire and forget to reconnect? Personally i have never had any luck with a repop ECM, plenty of originals still out there.

orange wire is definitely hooked back up.

 

[Buick Mark]

so I have a 86 GN factory ECM car sits in the garage most of the time hardly ever driven started and pulled the car out and was letting it run to warm up etc... while I cleaned the garage. long story short it ended up dying no fuel pressure found one of the pins on the original ECM broken off from corrosion. I ended up ordering one online it arrived with no chips installed so I had to install my chip and a smaller chip off to the side. installed into car and it started runs terrible won't idle. 2 things I have noticed I have a check engine light all the time and I also have a scan master gen 2 the round style and all the values on it are zero. when I turn the key on it says linking and it synchs up with the car but when I start the car all values are zero???? so im at a loss im thinking a bad connection or something with the factory plugs that connect to the ECM but I wasn't sure. I made sure the chips are in all the way and I also made sure the broken off pin is removed from the harness so those have been done? is there a relearn or something I need to do or a programing process I need to do with this new ECM. I got it thru auto zone its a cardone A1 brand.

Do what Chuck said, I bet the female end (the connector) has corrosion on some of the contacts.

 

[HotAirWH1]

"I have noticed I have a check engine light all the time" - What Error Codes are being thrown ???​

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link: Buick Grand National ECM Malfunction Error Codes​

 

[grass doctor]

once you clean or replace your plug for ECM...you will probably want to do a IAC reset if your idle and TPS parameters are out of wack....clean your IAC and throttle body while your at it...If you do this procedure ....ECM will need at least 25-30 miles of NORMAL driving to re-learn

IAC Reset Procedure

 

[grass doctor]

I would also suggest you start reading sticky threads in multiple sections....like this one great piece of info from @RUQWKNF

Info for New Turbo Regal owners.