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2001 chevy silverado wont idle unless you hold doen the gas…

Customer Question
2001 chevy silverado wont...

2001 chevy silverado wont idle unless you hold doen the gas pedlle and hold about 2200 rpms coffing and sputtering while going down the highway spuraticly showing no codes

Mechanic's Assistant: Has the vehicle turned into a gas hog? And how does it start -- same as usual?

Is using more gas sometimes it starts fine usually when warm otherwise hard start very rich alot of fumes fill up the garage quick

Mechanic's Assistant: Are you fixing your Silverado yourself? What have you tried so far?

Yes wouldnt pass inspection bad o2 sensor downstream past catalitic converter replaced plugs and wires and fuel filter pulled off the egr valve no chunks off carbon drawing straws

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Thats about it 231000 mi

Submitted: 6 months ago.Category: Chevy
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Answered in 1 minute by:
1/1/2018
Chevy Mechanic: Pete, Auto Service Technician replied 6 months ago
Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 32,932
Experience: 14 years GM dealer Technician.
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Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.

Can you tell me what liter engine is in your model?

Let me know so we can continue,thanks Pete

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Customer reply replied 6 months ago
5.3
Chevy Mechanic: Pete, Auto Service Technician replied 6 months ago

O.k., locate the fuel pressure regulator vacuum hose at the fuel injector rail on top of the engine and see if when you remove this hose with the engine cold or hot if fuel runs out of the regulator port.You may have to observe the port for awhile to see if any fuel runs out.If it does then the fuel pressure regulator needs to be replaced as it is flooding out the engine.

If this is found to be o.k. since it does act like it is running to rich and its hard to keep idle I would have the EGR valve tested/checked to see if it is stuck open ( having the fault codes and data signals checked on it or removing it to see if the pintle on it is stuck open ) with the valve needing to be replaced.

If this is o.k. I would then have the fuel injectors tested to see if one or more are flooding out the engine causing this fault needing replaced.

If more help is needed, use the reply tab to continue our conversation. If no further assistance is needed, kindly rate my service, your 5-star rating is appreciated ( should be a link to click on here or above).You can rate at any time and we can continue to work on your question as this will not close out your question.I work on delivering the best answer and help here but in some cases, it can be difficult to do without seeing the vehicle.

Thanks Pete

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