MAF trouble after decat

[Ian1975]

I recently decided to fit a decat delete pipe and egr blanking kit, had them fitted and obviously the EML light can on and threw codes for egr, but the car ran fine no issues, I’d been busy and not put the mapped file on, until Friday evening, I went to a job Saturday morning and the car had lost the low end torque, you can hear the turbo. I checked with the diagnostic tool and it came up MAF fault, I’ve checked all pipes and connections, I’ve ordered another MAF sensor, incase it has gone bad, anyone had similar issue, I remap cars and never had this with customers cars.

I’m going to run the ori file and see what happens to rule out either a fault with map or fault with MAF sensor 

[Steve Q]

When modifying the exhaust has the lambda sensor been damaged etc? 

[Ian1975]

10 minutes ago, Steve Q said:

When modifying the exhaust has the lambda sensor been damaged etc? 

Not that I know of mate, before I ran the mapped file, it was fine, it was 6 days before I ran the file 

[Steve Q]

Fair enough, was just thinking because the cat had been removed. Was there a sensor in the cat? 

[Ian1975]

15 minutes ago, Steve Q said:

Fair enough, was just thinking because the cat had been removed. Was there a sensor in the cat? 

Yes mate, I’m going to run the ori file in the morning and see if it solves the MAF but I can’t understand how the map would alter the MAF as it’s the first sensor along the chain