Question about Fiat Siena

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Fiat Siena EL. Vehicle backfiring through exhaust and won't rev up

16 Valve Twin Overhead cam. Engine code 178D Vin AFZ178F

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  • 369 Answers

The engine ignition system may be over advanced.

Posted on Apr 17, 2015

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Posted on Jan 02, 2017

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Terry Corrow
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SOURCE: Please can someone help me with the valve timing on a Fiat Siena EL

too big of a job for diy'ers,
http://www.ccw-tools.com/uploads/images_products/PDF/Instructions/VS1402.V2.pdf

valve timing on fiat siena el Bing Videos

Posted on Apr 04, 2015

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On all Fiat overhead cam engines which use bucket followers and shims then almost without exception the valve clearances should be:

0.50mm +/- 0.05mm - EXHAUST
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Hellen, For the second time, Re POST year, make, model, engine size and complete question so we, here at fixya can answer your question effectively.
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95 dodge dakota back fires above 2000 rpm


A tune-up is always a good idea. Is the system running rich or lean? Any applicable trouble codes? Is it back firing out the exhaust? If so, I got two thoughts, either an exhaust system problem or exhaust valves?

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How to set cam timing on fiat siena elx 2002 model 1600 16 valve


cam and crank should have marks on them . buy a manual and read up on setting the timing .

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The vehicle is backfiring through the exhaust and won't rev up.


Hi,I dont know if this is a timing belt or timing chain,
but if it is the belt drive timing belt then its possible that it has slipped a couple of teeth so that when it fires on a serton cylinder when one of the exurst valves is still open cousing it to back fire through the exurst,
I would first set up the engine timing,make shore that the mark on the crank pully is lined up with the pointer thats on the engine block then make shore that the cams are both lined up with the marks on the head,if ok,then you can adjust the ignition timing,
you will already have it at top dead centre by sorting out the engine timing,so take the distributer cap off the rotor should be pointing at the number 1 cylinder so it should just be ready to fire,if that seems to be lined up ok,its not your timing.
so you will have to do a engine compression test to see if there is eneything wrong with the valves or piston rings(most of the time its the problem with the head)if thats ok,then it must be to do with a fuel problem if you have a good spark from sparkplugs.
all the best,hope this got the brain cells working hard so you can get to the bottom of the problem.

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1 Answer

How do i tell the difference of a 2.2 or 2.4 engine?


The eighth digit in the VIN number - a code 4 is a 2.2 and a code T is a 2.4 engine.
The 2.2 is an overhead valve engine, the 2.4 is a double overhead cam engine.

Jul 25, 2012 | 1997 Chevrolet Cavalier

1 Answer

Trying to locate engine number to determine 16 0r 32 cam


Unfortunately, your question is very vague and hard to understand.

16 or 32 cam?
Usually your engine will have twin cams, or single cam.
Overhead cam(s) or not. You could determine if your engine
is a 4 or a 6 cylinder, and then you will generally find out how
many valves the engine has.

If you are in a 4 cylinder car, you probably have 16 valves if you have a twin cam engine.
If you have a single cam, 4 cylinder engine, then you will usually have only 8 valves.

The only way that you could end up with 32 valves, is if you have a dual overhead cam, v-6 engine.
Each head will have two cams, and each cylinder will have 4 valves then.

I hope that this is what you were trying to ask. :)

-Jackson
http://urbanscooters.com/

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2 Answers

I have a 2001 ford focus SE is my engine is a single or dual cam?


Look at the 8th digit on the vin #
3 = Duel
P = Single

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1 Answer

1997 chevy cavalier 2.4 twin cam engine dogs out when throttling


Possibly bad tpos sensor

Bad idle air control valve

Bad maf sensor

Check the computer codes first before spending any more money on it

Also do a compression check

And check your valve timing and ignition timing just in case.

Apr 05, 2010 | 1997 Chevrolet Cavalier

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