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1997 c1500 4.3 bogging Timing on my scanner goes from +30 to

Customer Question
1997 c1500 4.3 bogging Timing on...
1997 c1500 4.3 bogging
Timing on my scanner goes from +30 to -2 when it happens
56psi fuel pressure
No cats
Submitted: 2 years ago.Category: Car
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Answered in 11 minutes by:
8/25/2015
Auto Mechanic: Tool Hut, ASE Certified Technician replied 2 years ago
Tool Hut
Tool Hut, ASE Certified Technician
Category: Car
Satisfied Customers: 551
Experience: Owner of a mobile diagnostics company assisting auto technicians with difficult vehicles
Verified

Hi, My Name is***** have over 20 years experience repairing vehicles. I am a ASE Certified Master Auto Technician. I am confident we can resolve your problem together.Please remember I don't know your skill level. I can't see, smell, hear, or touch the vehicle. It may take a few back and forth replies to get to a satisfactory resolution.I also try to give all of the information you may need expecting a positive rating. If there is any reason I cannot get a positive rating please let me know.

Have you replaced any components or have any codes? Why no cats?

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Customer reply replied 2 years ago
Replaced the distributor pickup.
Installed egr block off plate.
I bought the truck with the cats removed
Auto Mechanic: Tool Hut, ASE Certified Technician replied 2 years ago

Is the vehicle running or key on engine off

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Customer reply replied 2 years ago
Running
Auto Mechanic: Tool Hut, ASE Certified Technician replied 2 years ago

I take it that your foot is off throttle? Can you take another picture? Turn off engine, turn key on. push accelerator to floor. take picture

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Customer reply replied 2 years ago
Where exactly is it?
Auto Mechanic: Tool Hut, ASE Certified Technician replied 2 years ago

There may be 1 on each side and unplug both if so. I attached a picture of location

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Customer reply replied 2 years ago
http://www.fixya.com/cars/t10397198-need_locate_knock_sensor_plug_4_3I found a post on there that its in a diff spot on the c1500
I found one close to the distributor and unplugged it. Still does the same thing
Auto Mechanic: Tool Hut, ASE Certified Technician replied 2 years ago

Ok. Just wanted to rule that out. My suspicion is the gear on the bottom of your distributor is worn. Remove distributor and inspect. The new gear is brass usually and lasts longer.

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Customer reply replied 2 years ago
Ok I will do that tomorrow
Auto Mechanic: Tool Hut, ASE Certified Technician replied 2 years ago

Let me know if you need further assistance.

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Customer reply replied 2 years ago
Took the distributor out today and the gear looks like new. Maybe it was replaced before I bought the truck
Auto Mechanic: Tool Hut, ASE Certified Technician replied 2 years ago

Do you have a fuel pressure gauge?

Does your scanner monitor long term and short term fuel trim?

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Auto Mechanic: Tool Hut, ASE Certified Technician replied 2 years ago

What are you long and short term fuel trims when acting up?

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Tool Hut
Tool Hut
Tool Hut, ASE Certified Technician
Category: Car
Satisfied Customers: 551
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Experience: Owner of a mobile diagnostics company assisting auto technicians with difficult vehicles

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