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Fuel Systems -- Maintenance & Repair

191 messages,  Last post on Sep 23, 2011 at 10:41 AM

You are in the Maintenance & Repair Forum.

What is this discussion about? Car Safety, Fuel System, Electrical, Fuel System, Alternative Fuels, Diesel, Hybrid Cars, Car Financing, Fuel Efficiency (MPG), Car Warranties, Coupe, Convertible, Hatchback, Truck, Sedan, Wagon, SUV, Van

Messages Page 18 of 20

#162 of 191 Declining gas mileage by AZBuck

Feb 08, 2009 (4:04 pm)

Have a 2003 Passat, 4 cyl. turbo. Gas mileage been declining for a year(from 30 MPG to 24 MPG). Car runs as well as ever-doesn't make sense. Tires inflated slightly above recommended. 58K miles.
 
Thanks

#163 of 191 Re: Declining gas mileage [AZBuck] by dtownfb

Feb 11, 2009 (10:55 am)

Replying to: AZBuck (Feb 08, 2009 4:04 pm)
has your daily commute changed? have you kept up with maintenance? has the gas changed in your area, meaning has your gas stations switched to using E10 (10% ethanol)?

#164 of 191 Re: Declining gas mileage [dtownfb] by AZBuck

Feb 12, 2009 (11:32 am)

Replying to: dtownfb (Feb 11, 2009 10:55 am)
No-nothing has really changed. If anything, I'm driving more conservatively and inflated tires higher. No leaks, nothing obvious.
 
Thanks

#165 of 191 Re: Declining gas mileage [AZBuck] by dtownfb

Feb 20, 2009 (2:07 pm)

Replying to: AZBuck (Feb 12, 2009 11:32 am)
I would post your question in the Passat board. Since you have a turbo, there could be an issue there.
 
http://townhall-talk.edmunds.com/direct/view/.f0a3002/

#166 of 191 Re: Declining gas mileage [dtownfb] by AZBuck

Feb 21, 2009 (8:49 am)

Replying to: dtownfb (Feb 20, 2009 2:07 pm)
Thanks. I'll check it out. I should add that I took it to dealer a couple days ago. They said they didn't see a problem and to make sure I use premium gas. Didn't sound like much of a rec.

#167 of 191 Dead spot by nscrfn

Mar 14, 2009 (10:35 am)

84 chevy c10 w/2bbl 305 has a dead spot in carb.Rebuilt carb thinking it would fix problem but it didnt.What else can be done to remedy this?Please help!

#168 of 191 Re: Dead spot [nscrfn] by bolivar

Mar 15, 2009 (12:02 am)

Replying to: nscrfn (Mar 14, 2009 10:35 am)
Did the rebuild include replacing the 'power piston'? A bad one can reduce acceleration a bunch.
 
Lots of other things could be wrong, especially with a carb this old. Air leaks around worn out shafts on the throttle will make it run lean, etc, etc, etc.
 
Problem in the distributor with the advance?

#169 of 191 Re: Dead spot [bolivar] by Mr_Shiftright HOST

Mar 15, 2009 (9:53 am)

Replying to: bolivar (Mar 15, 2009 12:02 am)
Bad vacuum advance will have this symptom. Also carbs need to be accuracy set up after the rebuild with everything in specification.

#170 of 191 Throttle Body Service by jstawski

Mar 20, 2009 (2:27 pm)

Hi everyone!
 
Here's my story! I have a 2006 Volvo S40 Lease that is up on April 1st. About 2 months ago my Check Engine Light came on and I drove the car to the dealer to get it fixed (still under warranty). They've told me the problem is the Throttle Body is dirty and they have to do a Throttle Body Service ($150). They also told me they will clean it up and run the computer test again to see if the problem goes away if it doesn't they will have to continue troubleshooting and fixing. This sounds to me that $150 can easily become thousands!
 
Car history:
On a very rainy day I drove the car into a big puddle of water and it hydrolocked the engine. The engine was changed at the same dealership mentioned above. I performed the scheduled maintenances and use regular fuel.
 
I don't care to properly fix the car, i just want to fix it enough for the Check Engine light to go away until after I return the vehicle. I know the Throttle Body cleaner is $5 dollars, but although i'm a very handy person I don't know enough about engines to take them apart. I don't even think i have the right tools.
 
What do you recommend? Should I try to clean the Throttle myself or let the dealer do it? Is it very easy to clean it? Take it apart? Should i take it somewhere else?
 
Thanks in advance....

#171 of 191 Re: Throttle Body Service [jstawski] by Mr_Shiftright HOST

Mar 20, 2009 (3:44 pm)

Replying to: jstawski (Mar 20, 2009 2:27 pm)
This might help you.
 
Cleaning Throttle Bodies
 
Also check YouTube for throttle body cleaning videos!
 
Without knowing what the code # was that the dealer scanned, I have no way to guide you as to whether their approach is correct or not. You might see if Autozone would scan your car for free and come up with a code for us.

Messages Page 18 of 20

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