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I have 1998 k2500 7.4. Very rough idle after loop closes. I…

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I have 1998 k2500 7.4...
I have 1998 k2500 7.4. Very rough idle after loop closes. I have replaced MAF, MAP, DISTRIBUTOR, CAP, ROTOR,PLUGS,WIRES,CRANK SENSOR,BOTH UPSTREAM O2 sensors, fuel rail , 8 bosh injectors, 3 pressure regulators,coil and spark control. Bank 2 is riching the fuel up 50 and bank 1 is leaning it out -30. I'm at my whits end here. I'm thinking that it is going to be something simple that I'm missing. I have also replaced the computer. I think I have also checked all the grounds. I have also replaced the fuel pump and fuel filter in the last 3500 miles. I used a acdelco pump.Any help would be great.
Submitted: 11 months ago.Category: Chevy
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Answered in 1 minute by:
9/19/2017
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 11 months ago
AMEDEE
AMEDEE, CHEVY TECHNICIAN
Category: Chevy
Satisfied Customers: 28,352
Experience: ASE certified tech ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
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Hello and welcome!

My name isCustomerand I can assist you with your question.

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Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 11 months ago

I am very sorry your having this issue with your vehicle.

I will try my best to answer all of your questions.

However, before we get started, please let me mention a few things.

1. If at any point you would like to speak on the phone, please feel free to request a phone call on your end and I can call you right away.

2. If you dont understand any technical terms or anything that I mention (component tests or theory or operation), please let me know and I will provide you with a more in debt explanation or answer.

3. Please understand that I am here to help.

What is the engine vacuum at when the engine is at idle?

Would you be willing to speak on the phone?

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Customer reply replied 11 months ago
I'm not at truck now. I'm using snap on. Solus scanner. Which is not giving any codes. I have zero vac leaks but don't know what vac is reading.
Chevy Mechanic: AMEDEE, CHEVY TECHNICIAN replied 11 months ago

Ok, no problem.

We can continue tomorrow after have had a chance to check engine vacuum.

Talk to you then!

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