Do I have a bad ECU?

Hello everyone. New here. Been here a lot but never had an account. Now I have need some help with something I just cant quite figure out.

First of all I have a 2003 4.7 v8 with 281k miles. And well it is in limp mode right now. I am wanting to think the ecu is bad because of some other symptoms as well. First is that I had 4 coil packs suddenly fail. They were new but failed after 2000 miles. I had them a few month and then one failed. And then shortly after more did.

The other would be the weird shifting. It has a delay when shifting automatically. Like it hesitates. And sometimes the gear shift makes noise going into gear. Just shifting issues are weird and vehicle seems kinda jumpy when shifting automatically.

I have replaced all plugs and injectors and cleaned mass airflow and throttle body. My oil is just about due. My fluids are all good though. Air filer and fuel filter and cabin filter good. There is no rough idle. Vehicle starts fine. And does 35 max. The only thing wrong now is my cats burned up from failing to detect the coil packs in time and are dead, but should not cause limp mode. I dont think.

It felt like it was trying to go into limp mode a couple times in the past few days. But it never did. It felt like the tires skipped. But for just a brief moment. Drove 5 miles today and then it went limp completely.

So I am thinking ECU but could be TCM. Only thinking ECU cause of the weird coil pack fail issue. Does anyone have any ideas?

 

I personally would take it to a shop and let them tell you what’s wrong. I THINK Firestone does a diagnostic for $10. I know two years ago that’s what they charged. Otherwise you’re just doing the parts cannon at the car. Which can get very expensive.

 

Codes? If you don't have a code reader, the chain auto parts stores will do it for free. If you want to buy one, recommend BlueDriver.

 

^^^^^^^^^^^^^^^ Get the codes. And there will be some. Report back.