Question about 1997 Volkswagen Golf

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I have a 2002 golf mk 4 1.9tdi pd100 it is high mileage 140000 and i am finding it is generally losing power, also mpg seems to be getting worse on trip comp, regularly serviced using genuine parts and correct pd oil. where do i start? turbo, maf, no fault codes registered

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The turbo is a good start remove and check for excessive play on turbine/compressor sharft, one way to check is to press down on the shaft on the compressor end (silver side) and turn wheel,if making contact with housing then you have worn bearings causing wheel to drag slow down it's speed caursing it not to work,also check the condition of both wheels, compressor and turbine if pitted or worn replace unit, if cost is a factor then a reman or a good used unit will work,

Posted on Oct 07, 2009

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Reason for terrible gas mileage.


Check coolant temp sensor. Is tailpipe black?

Feb 02, 2015 | 2002 Hyundai Santa Fe

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How to increase the gas mileage and power of your high mileage vehicle.


There are many different approaches you can take to restore lost power and gas mileage on you old vehicle. Feel free to try one or all of the following. I have tried them all and have found them to work for me.
1. Fuel Injector/Carburetor Cleaner. There are many different types out there. Many people say that these different chemicals do not do anything. I have found that they do work. Over time as you drive, gas and different imperfections in the gas will build up in your fuel line/fuel injectors/ carburetor. This will constrict the amount of gas that is injected into your engine thus limiting fuel economy and power. I recommend using one bottle at each gas fillup for three fillups then at every fillup that you see necessary.
2 Oil Additives. Once again, there are many different types, and many people people say they do not work. However, some are designed for high mileage vehicles and tackle specific problems you may be having. I use one that limits the amount of oil my 96 Corolla burns. I find that although it does not solve the problem, it does limit it. If i did not think it was worth my money, i would not be posting it here.
3. Tire Pressure. This step goes for all cars, not just cars with high mileage. Tire pressure is important for maintaining a smooth and efficient ride. You should fill your tires up the the pressure specified in your owner's manual or vehicle information sticker which is located in one of the front door's sile or in the glove box. Take caution, however, if the recommended tire pressure is above the max tire pressure(found on side of tire). It is better to have poor gas mileage than to risk a tire blowout.
4. Train Yourself to Drive Efficiently Install a MPG reader that tells you how efficiently your car is while you are driving it. Over time, you will learn how best to tackle the daily commute to work so to save gas. They will also come in hand if your check engine light comes on as some MPG readers double as a scan tool. You do not even need a MPG reader to drive efficiently on the highway. For most cars the sweet speed is 58mph. above this, your engine needs to work to hard to maintain a speed. Below this, and your engine is wasting power. Do not drive aggressively, and avoid hard stopping and fast accelerations. And on the highway, the key is to a constant speed, so use cruise every chance you can.
5. Keep Your Engine Clean. A very important step, there are many parts that can be done to improve MPG or power. First, inspect your air filter. Hold it up to the sun, if you can see through it, it is fine. If not replace if you wish. It used to be thought that a dirty filter hindered MPG. Now we know that it does not affect MPG but it does affect power or pickup. Next clean your PCV valve(if you have one) and hose using PCV cleaner This is a cheap spray that does wonders. Cleaning the PCV will allow for greater power when accelerating. And finally, as weird as it sounds, show your engine some love. It may seem strange, but a clean, and loved, car/engine just seems to drive nicer and more efficiently.

Remember, a car with bad gas mileage can be turned around and made as efficient as the day it came off the line. All you need is some know-how, patience, and determination. Cheers to safe, and efficient driving.

on Apr 12, 2010 | Toyota Corolla Cars & Trucks

1 Answer

94 4.3 vortec getting horrible gas mileage why???


Go to You Tube Video to find the problems
with that motor & the solution
A local repair shop can check bulletins in their
data base for the fix also
Most likely intake gasket,if you use Dex Cool
It eats gaskets & the vehicle is old ,so you can expect
to be constantly working on it

Jul 01, 2013 | Chevrolet Tahoe Cars & Trucks

1 Answer

2002 Mercedes C320 very poor fuel economy ~8 mpg, no engine codes or faults present


I'm not sure what the problem is specifically, but I can assure you this--you're basically throwing money way (and possibly exacerbating the issue) by using 93 octane fuel. Your car is timed and tuned to run most economically and with best performance with 87 octane fuel. The higher the octane, the slower the fuel burns. Longer burn time can equate to more power, but ONLY if your engine is designed and tuned for this application.
Couple of suggestions..checkto make sure your exhaust is "free". A plugged catalytic converter can really rob mileage. Tire pressure and air filter are worth mentioning as well.

Jan 01, 2013 | 2002 Mercedes-Benz C-Class

1 Answer

1989 Jeep Cherokee all of a sudden is getting terrible gas mileage! Like FIVE miles to the gallon! The exhaust pipe is broken. could that be the cause?


if you drive with holes in the system...you lose power and put strain on the vehicle to perform better and it gets loud and your gas mileage will get worse and worse...so fix it or have someone do it. it's 15mpg normally

Oct 07, 2012 | 1989 Jeep Cherokee

1 Answer

I have an 2003 Mk 4 Golf GT TDI 150, Intermittently when I start it up, it will tick over but will not rev at all.


I had a similar problem - engine would run at only low rpm. I suspected fuel starvation from a clogged fuel filter, but it turned out to be a carbon-fouled intake manifold. Depending on how yours was driven (lugging?) and the total mileage (high), I would check the manifold for carbon builup. Cleaning the manifold is difficult or very expensive, as it should be removed and baked out. There are probably several other possible causes that I, fortunately, have not experienced.

Dec 03, 2011 | 2003 Volkswagen Golf

1 Answer

Poor fuel mileage and power 2009 chevrolet malibu


Your numbers aren't that far off...the mpg posted is established using professional drivers...I could likely coax a few more mpg out of your car if I drove it because I know how. Generally, today's new engines do not need any "break in" so it should have adequate power right out of the box! There may not be any updates for the computer, but the map sensor should be able to compensate for altitude changes. Using a synthetic oil can help a bit as well.
I'd try and find out if there were any optional transmission or final drive gear options offered for different localities. That may affect both mpg and performance. As for shifting, (as well as everything else you mentioned, I'd definitely contact factory customer service if you aren't getting anywhere with your dealer) The car didn't cost $5.00, and therefore I would take it to the "next level" if you aren't happy with it!!

Nov 15, 2009 | 2009 Chevrolet Malibu

2 Answers

I have a 05 nissan sentra and it rides great, but the gas mileage is terrible only getting approximately 18-20 mpg. What may be the problem. I upgraded the gas octane.


you need to change the spark plugs and wires to properly burn the gas fully then you can just get agood oil change and you would get better gas mileage

Oct 29, 2009 | 2005 Nissan Sentra

1 Answer

Hi i have a vw polo 2003 1.2, basically before i


that's...thirty liters or so?...10.4 liters per hundred. I'm getting 30 UK MPG...that sounds rather low for a 1.2 . it should be getting 35-40, I believe. better get yourself a tuneup if you can afford it.

Jun 15, 2009 | 2002 Volkswagen Golf

1 Answer

Poor gas milage


Not sure where you live but if the gas you get has a higher amount of ethanol in it you will get worse gas milage.But there are many reasons that effect gas millage.

Nov 24, 2008 | 2004 GMC Canyon

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