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Very low fuel economy, and exhaust makes a noise when i accelerat

Fiat stilo 1.6

engine seems to be running smoothly but when i accelerate the exhaust starts to rattle around making a banging noise

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10 years old, when was it last serviced appropriate to the mileage?

Posted on Aug 13, 2016

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02 censor... start there..

Posted on Jul 27, 2009


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Posted on Jan 02, 2017

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1 Answer

What is the best way to remove the water pump?

To remove the water pump of Fiat Punto/Stilo:
1 Disconnect the battery negative terminal.
2 Drain the cooling system.
3 Remove the timing belt.
4 Unscrew the retaining nut and the three bolts and withdraw the coolant pump (see illustration). If the pump is stuck, tap it gently? using a soft-faced mallet - do not lever between the pump and cylinder block mating faces of Fiat Punto (Stilo). best-way-remove-water-pump-x4hf4jmz40to2ykgevxwzmql-3-0.jpg

Source: Coolant pump removal inspection and refitting FIAT Punto

Sep 27, 2014 | 2006 Fiat Stilo 1.6

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Can you tell me the colour of the earth wire to the fuel tank of my fiat stilo

Most likely not a wire, bad sending unit on the fuel pump, but most grounds are black or white/black stripe

Jul 31, 2014 | 2004 Fiat Stilo

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Bad mpg on fiat stilo 1.8

the vehicle is running rich! Meaning there is to much fuel being pumped through the injectors or carb in the air fuel mixture that is pumped into the bore. If your car is running and you smell a strong fuel smell coming from the exhaust that is normally an indication of a rich mixture. This needs to be balanced which should improve your mpg. The other possibility is that the choke may be stuck open.

Aug 09, 2013 | Cars & Trucks

1 Answer

Lost gas milage

There are literally dozens of potential causes for a decrease in fuel economy - many of them will also cause other symptoms with the way the vehicle operates, which can be helpful in diagnosing the problem. Some of the more common ones are:

* Fuel/Intake System Restrictions - Dirty air filters, fuel filters, and fuel injectors make your engine work harder to generate the same amount of power at the wheels, thus wasting more of its own energy and reducing mileage. This is probably the most common cause of gradual fuel economy loss because, unless the problem is severe, computer controls can usually compensate such that the average driver doesn't notice any issues. This is why it's important to stick to maintenance schedules, even if it seems unnecessary at the time.

* Engine Management Problems - Modern vehicles rely heavily on computer controls to "fine-tune" the engine in real time for maximum efficiency; an assortment of sensors monitor various engine parameters and feed data to the computer that allow it to make adjustments as conditions warrant. Most of these sensors are subjected to some "hostility" during operation (high temperatures, corrosive gases, contaminants, mechanical wear, etc) and do occasionally fail, preventing the computer from correctly doing its job and consequently reducing efficiency. Similarly, the computer in turn uses some electronic and electromechanical devices to actually control the engine, which can suffer the same fate. Problems of this type will almost always turn the Check Engine light on and cause additional driveability issues (rough idle, poor acceleration, stalling, etc).

* Wheel-End Problems - Low tire pressure is another common cause of low fuel mileage. Low pressure allows a greater portion of the tire tread to contact the road, increasing friction and sapping power (it also causes accelerated and abnormal tire wear). Wheel alignment problems cause similar issues by forcing tires to "drag" across the pavement to some degree, rather than roll smoothly. Less commonly, malfunctioning braking or all-wheel drive systems can cause additional drag at one or more wheels, wasting power.

* Environmental Issues - The environment and manner in which a vehicle is operated can have a big impact on its fuel economy that you might not consider unless you stop to think about it. Your mileage may decrease in snow, for example, because you spend more time in stop-and go conditions and in low gear, or in the summer months if you drive more aggressively. Changes in overall driving habits (going from mostly highway to lots of city driving) can also play a big role.

* "Parasitic" Problems - The engine is ultimately the source of all power used by every system in the vehicle, and as such, any part of the vehicle operating in an inefficient manner has the potential to reduce fuel economy. Clutch/transmission slippage, for example, can cause a dramatic loss in fuel economy, as can regenerative braking malfunctions in hybrid vehicles. Engine accessory problems (water pumps, alternators, etc) can put fuel-wasting drag on the engine, as can internal mechanical problems of the engine itself (these types of problems usually make themselves apparent in other ways - a bad alternator will cause electrical problems or make noise, for example). Even body damage or modifications can increase wind drag, decreasing fuel economy.

One last thing to keep in mind: it is entirely possible for several causes to simultaneously contribute slight effects which all add together to cause a more pronounced problem; hence, it isn't always possible to pinpoint a single "silver bullet" that will cure poor fuel economy, especially in higher-mileage vehicles.

Feb 20, 2011 | 1993 Geo Storm

1 Answer

My 52 plate Stilo 1.9 JTD has an ongoing fault of engine backing off at high speed (but maintains this speed if you accelerate away) and cutting out altogether when slowing down to idle for a junction for...

I would suspect a system that is only supposed to work in mid range.
I don't know the European pollution laws, but in the US, the ERG or purge valves can cause this sort of symptom.
Both are essentially small intake manifold leaks, that mess up the mixture to some degree.
The EGR (exhaust gas recirculation) is just terrible in that the exhaust deposits clog the valve and cause it to bind open, while also harming the valves as well as performance and mileage. I would remove an EGR system UNLESS the engine is so high of compression, that it requires exhaust to poison the mixture, in order to prevent pre-detonation from compression, with low octane gasoline.
The purge valve is to vent the gas tank, to prevent both vaccum or excess pressure releasing gas fumes to the atmosphere.

Oct 05, 2010 | 2005 Fiat Pininfarina

1 Answer

Fiat Stilo 1.9JTD power loss after 30k miles Sometimes (frequently!), pressing accelerator has no effect. Into neutral, press again & after short pause & burst of black smoke, off we go until the...

Its the EGR valve. Had exactly the same problems on my old 1.9 JTD.

You can take it off and remove all the carbon crud thats built up inside but the problem WILL return unfortunately. Its a mechanical failure so no error codes will be shown for this fault. You can also block them off which will return all of your power but also possibly make it an MOT failure due to excess soot coming from the exhaust.

Oct 02, 2009 | 2005 Fiat Pininfarina

1 Answer

Fiat Stilo intermittant loss of power

How old is the car? Have you tryed fuel injection cleaner? Is it well you speeding up?

May 13, 2009 | Fiat Pininfarina Cars & Trucks

1 Answer

Hesitation, stalling like out of gas

Clogged Catalytic Converter. What happens is as you push down harder on the accelerator you force more gas into the system causing a slightly richer mixture and more exhaust flow is neccessary. The easiest way to look for a clogged cat is when it's dark out take it for a ride causing it perform it's problem look under the vehicle if the cat is literally glowing red hot you either have a clogged cat or an extremely rich fuel mixture.

Nov 20, 2008 | 1994 Jeep Wrangler

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