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Recent Exhaust questions

When I take my foot off the gas pedal, the engine sounds

When I take my foot off the gas pedal, the engine sounds like it is going to stall. Will go through 3 to 5 cycles before settling into idle. All vacuum lines have been checked or replaced, fresh tune up last week, and new fuel filter. Problem gets worse when fuel tank is 1/2 or belowJA: Is the fuel filter an external one, or is it inside the tank?Customer: External, passenger side frame railJA: What is the model/year of your Chevy?Customer: 1990 full size, Silverado package with 350 TBIJA: Are you fixing your Silverado yourself? What have you tried so far?Customer: I have tried numerous things, finally took it to a shop last week. They found a wire bad at the throttle position sensor, and replaced it, as well as tune up...cap rotor wires and plugs, and fuel filter. Ran great for 4 days, then gas tank got to 1/2 and problems returned. This issue has gone on for about 3 years. My thought is an electrical issue.. When it gets bad, the check engine light comes on (code for MAP sensor). I pull over, turn off the vehicle, drop the transmission selector to low 1, back to park, and she fires right up and runs well for a while. When the check light is on, there is an "electric" smell to the exhaust, and it feels like she dropped a couple of cylindersJA: Anything else you want the mechanic to know before I connect you?Customer: She runs great when on the throttle....but when you get off its a different story

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Tim's Auto Repair

Mechanic

High School or GED

18,160 satisfied customers
HELP! We have an 2009 cHEV Duramax 5500 that we had to

HELP! We have an 2009 cHEV Duramax 5500 that we had to replace the DPF Filter in . It ran for about 100 miles and then shut down. We have had it to 2 mechanics and they cannot seem to find the problem. It still shows the DPF is plugged and it is not plugged.JA: How many miles are on the car? How has your mileage been lately?Customer: Its not a car it is a diesel 5500 chev truck and it has 134000 milesJA: What is the model of your '09 Chevy?Customer: 5500 duramaxJA: Are you fixing your vehicle yourself? What have you tried so far?Customer: No like I said we have had it to 2 mechanicsJA: Anything else you want the mechanic to know before I connect you?Customer: no

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Roy

shop foreman

Associate Degree

7,124 satisfied customers
How to clean exuast filter on 6.6 desil, 125000, 2007 chevy

how to clean exuast filter on 6.6 desilJA: How many miles are on the car? How has your mileage been lately?Customer: 125000JA: What is the model/year of your Chevy?Customer: 2007 chevy dourmax 6.6 desilJA: Are you fixing your vehicle yourself? What have you tried so far?Customer: i change fuel filter.still reduse engine power light onJA: Anything else you want the mechanic to know before I connect you?Customer: no

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GM Tech (Cam)

Owner/Technician

Vocational, Technical or Trade Scho

26,162 satisfied customers
I have a 1970 model C20 new crate motor, new HEI, plugs, new

I have a 1970 model C20 new crate motor, new HEI, plugs, new fuel filter, fuel pump, plugs, and wires. it cranks and won't start. I have spark, fuel and compressionJA: Have you checked the engine's fuel supply? And the spark plugs -- are they all working?Customer: yesJA: What is the model of your '70 Chevy?Customer: I'm not sure if it's 180 out right not the balancer is on top dead center but it's acting like it's on the exhaust strokeJA: Are you fixing your vehicle yourself? What have you tried so far?Customer: C20JA: Anything else you want the mechanic to know before I connect you?Customer: I am fixing it myself I am an ASE certified mechanic but I have zero experience with HEI and V-8 distributors mostly air cooled V-dubs

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rpmdiag

High school

7,080 satisfied customers
I have a 1998 Cevrolet Tracker, 1.6 sohc 16valve. Recently

I have a 1998 Cevrolet Tracker, 1.6 sohc 16valve. Recently it blew head gasket so I pulled head and had it cleaned, milled and pressure checked and with no cracks or being warped, bought my gasket set and reinstalled everything back to original positions. Had mechanic of 40+ yrs set timing and it will turn over fine, just won't start. I was told it should time up on # 4 TDC n also #1 TDC, but had mechanic try both setting, but it still will not start.JA: Is this your first time dealing with this issue? What size is your engine?Customer: 1.6 sohc 16 valve. Yes, this is the first time.JA: What is the model of your '98 Chevy?Customer: TRACKER, READ ABOVE.JA: Are you fixing your vehicle yourself? What have you tried so far?Customer: I have had help from a family memeber that has been a mechanic at same shop for 40+ yrs. We have tried everything. Checked and it is getting gas, it is getting firwe, checked the injectors and they are firing.JA: Anything else you want the mechanic to know before I connect you?Customer: NO

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K. Wiggins

Automotive Consultant

Associate Degree

2,726 satisfied customers
P0175, P0173 Bank1 and 2 too. SBFT -7 and under pressure -20

P0175, P0173 Bank1 and 2 too rich. SBFT -7 and under pressure -20 LTFT -24 2000 5.3 v8JA: Besides this, what condition is the car in?Customer: goodJA: What is the model of your '00 Chevy?Customer: Silverado 3 doorJA: Are you fixing your Silverado yourself? What have you tried so far?Customer: Yes. New MAF, Fuel Pressure Regulator, New fuel injectors, New PCV valveJA: Anything else you want the mechanic to know before I connect you?Customer: Fuel pressure reads 48 when closed loop then goes up to 54 when shut off

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Chad Farhat

Owner

Associate Degree

2,132 satisfied customers
Po175 canot seem to find any vaccum leaks, it is a 99 mostly

po175 canot seem to find any vaccum leaksJA: How old are the hoses? And what driving conditions do you most often encounter?Customer: it is a 99 mostly hywayJA: What is the make/model of your car?Customer: 99 chevy express vanJA: Are you fixing your Express yourself? What have you tried so far?Customer: trying did vaccum test with carberator cleanerJA: Anything else you want the mechanic to know before I connect you?Customer: van seams to be running real well in idle and also in driving could it be a faulty o2

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david craig

OWNER/MECHANIC

Associates

852 satisfied customers
Where is the CKP (crank pos sensor ) located on a 2008

where is the CKP (crank pos sensor ) located on a 2008 uplander 3.9 Dave M .Grand Rapids,MI.JA: Does the vehicle stall at low speeds? Does it sputter?Customer: Yes does sputter but not stall . whand to slowdown for 10 min then I can shut off and its mostly fine until it sits over nightJA: Are you fixing your Uplander yourself? What have you tried so far?Customer: yes showed err codes knock,performance and CKP failJA: Anything else you want the mechanic to know before I connect you?Customer: transax shifts wrong then goes away @ highway speeds

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Gary

Vocational, Technical or Trade Scho

25,528 satisfied customers
2003 Chevy 5.3 4x4. Random misfire code is all that's

2003 Chevy 5.3 4x4. Random misfire code is all that's showing up. Starts fine and runs fine but seems after it goes into open loop it's starts running only off bank 1 cylinders. I can pull plug on all coil packs in bank 2 with 0 change in performance. Cylinder 6 is reading way more misfires then the other 3 cylinders on scanner.

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30 satisfied customers
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