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Recent Exhaust questions

Acceleration goes somewhat flat under heavy demand. Not a

Acceleration goes somewhat flat under heavy demand. Not a bog or fuel starvation symptom. Swept TPS, MAP and MAF. No issues. Fuel pressure normal even under a load. Fuel filter clear. No codes. No misfires or vacuum leaks. It does however have the classic buzz from the catalytic converter like a baffle that has broken loose internally. Cat / resonator never replaced. I'm leaning towards restricted exhaust at this point.

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Roy

shop foreman

Associate Degree

8,032 satisfied customers
I have problem with the code p0641 after install short

I have problem with the code p0641 after install short heatersJA: Have you checked the coolant level? Has there been any leaking from the hoses?Customer: Truck wont start some time gime the code about the camshaft sensorJA: What is the model/year of your Chevy?Customer: 08 chevy silverado 4.8 crew cab 2wdJA: Are you fixing your Silverado yourself? What have you tried so far?Customer: I have my own mechanic shop just try to upgrade too hethers on the exaust for more powerJA: Anything else you want the mechanic to know before I connect you?Customer: I need to know with sensor work with the cocde

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JOHN aka Eauto

self employed

High School or GED

13,120 satisfied customers
Excessive oïl consommation of my duramax 2002 gmc silverado?

excessive oïl consommation of my duramax 2002 gmc silverado?JA: Are you fixing your Silverado yourself? What have you tried so far?Customer: changing mass air flow sensor and repair and change injector no goodJA: Does the engine stall right after starting? And what about hesitation or jerking during acceleration?Customer: no problems of acceleration and startingJA: Anything else you want the mechanic to know before I connect you?Customer: only dark exhaust when i accelare after no smoke

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Pete

Independent Auto Technician

Vocational, Technical or Trade Scho

17,006 satisfied customers
I want to get VCI from GM but they require dealer code. I

Hello, I want to get VCI from GM but they require dealer code.JA: Do you have a scan tool to read the codes?Customer: I have mdiJA: What is the model/year of your Chevy?Customer: 2016 camaro ssJA: Are you fixing your Camaro yourself? What have you tried so far?Customer: Actually not fixing. I 've just installed gm performance exhaust and i want to do calibrationsJA: Anything else you want the mechanic to know before I connect you?Customer: No

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GM Bob

Automobile Technician

High School or GED

1,986 satisfied customers
Have a BPS, and a MIS indicator in red on my code reader for

have a BPS, and a MIS indicator in red on my code reader for my 2013 denali HDJA: Just to clarify, what's the exact code? And have you tried to reset it?Customer: not getting a code, just an indicator lightJA: What is the model of your '13 Chevy?Customer: denali hdJA: Are you fixing your vehicle yourself? What have you tried so far?Customer: no, just looking for info on theseJA: Anything else you want the mechanic to know before I connect you?Customer: truck has a loss of power, and around a month ago the oil filter housing gasket blew and my oil drained onto the street while the truck was remoted started, shut it off as soon as i came outside to it and had it towed into a shop and oil replaced.

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5,368 satisfied customers
I have a Chevrolet 2002 Duramax with the LB7 motor. The

I have a Chevrolet 2002 Duramax with the LB7 motor. The truck has 165,000 miles on it. The truck was smelling like diesel when I would drive it and there was some smoke out the exhaust at idle. I decided to change the injectors. I replaced the injectors and the injector fuel lines with a high quality injector from industrial injections. I have a certified diesel mechanic helping me.Once we completed the installation we started the truck and it runs like a top. However, now there is an excessive amount of smoke coming out the crank case vent tube. Also looks like a freight train smoke stack when you pull the oil fill cap off.When we changed the oil there was approximately 4 gallons in the crank case, almost half of which being diesel.My mechanic feels that the blow by is caused from the rings being shot due to the oil not lubricating the system. He believes it is smoking now because all the cylinders are firing correctly which is creating more blow by and recommends replacing the motor.I asked about the possibility of one of the injectors not being correctly installed but he said it should make a loud hissing noise if that was the case as the pressure comes out the top side and not into the crank case.What are your thoughts.When we pulled out the injectors there were three that appeared to be completely plugged on the input side.

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Daniel Wilson

Auto Mechanics 1&2/diesel mech

5,026 satisfied customers
Coolant is dropping down and the oil volume is rising, About

Coolant is dropping down and the oil volume is risingJA: When was your last oil change?Customer: About a week ago,it was so full that theJA: What is the model/year of your Chevy?Customer: 97 suburban, 5.7. The crankcase was so full of fluid that smoke/steam was pouring out of the exhaust.JA: Are you fixing your Suburban yourself? What have you tried so far?Customer: I am guessing that the heads are leaking bad. Did replace the spider and the lower plenum gasket.JA: Anything else you want the mechanic to know before I connect you?Customer: We're ok

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168 satisfied customers
Under a load it throws "check gauges" and the "DPF light is

Under a load it throws "check gauges" and the "DPF light is red all the time. Removed DPF filter its was restricted to 6.5 in/water. Baked and cleaned. flow is now 4JA: Just to clarify, what are the exact lights you're talking about?Customer: The amber "check gauge" and the DPF indicator red. This is a rolloff tow truck C5500. The engine under full temp and load flashes the check gauge light then shuts down. You can restart it right away. If you go to a full pull again it will do it again.JA: What is the model/year of your Chevy?Customer: 2008 C5500 duramaxJA: Are you fixing your vehicle yourself? What have you tried so far?Customer: We are a shop. We cleaned the DPF filter. Replaced a fuel line at the suction side of the filter head. My scanning equip show a P2632 Fuel Pump 2 Relay control circuit test failed. fuel filter is new. No performance issue under normal operation.JA: Anything else you want the mechanic to know before I connect you?Customer: can't think of anything

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80 satisfied customers
Misfire problem, 140,000 05 cobalt with 2.2 has steady miss

misfire problemJA: How many miles are on the car? Is it a steady misfire? Or random?Customer: 140,000 05 cobalt with 2.2 has steady miss on every cylinder. swapped coil, changed plugs, did injector balance test with 20psi drop, cylinder compression is at 210 on each cylinder, 8% leakage during cylinder leakage test. unhooked exhaust no restriction, timing is perfect, load tested icm circuit wires, and injector ground wires to ecm, replaced ecm.JA: Are you fixing your Cobalt yourself? What have you tried so far?Customer: yes i am fixing it.JA: Anything else you want the mechanic to know before I connect you?Customer: no

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david craig

OWNER/MECHANIC

Associates

2,488 satisfied customers
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