Technical mpg

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Technical mpg

cece

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Feb 15, 2010
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hi i have a seicento 899cc sx and iv'e only just got 32 miles to £10 now i no you should get more than that so any suggestions cheers if you can help
 
If you are relying on the fuel light to tell you when your £10 is gone....don't. It depends on whether you are going right or left.

Fill the tank up, run for a couple of hundred miles, then refill to check exactly how much you have used, and therefore you actual consumption.

However, when was the car last serviced?

Can you easily push the car on a level surface?

Cheers

D
 
Hi

Check engine oil level if it is above the top mark and seems thin change it before running the engine, then fill petrol tank and also get some redex injector cleaner and add a double dose to tank on fill up. Mine needs redex all the time.

Next time you go anywhere like e.g. oil factors spit on finger and apply to rear drums, if one side is hot strip the drum off and fettle., I'd do both sides but you will understand that letting fingers regrow first may be nicer.

Noel
P.S. 55mpg, unless you wear lead boots
 
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hi cheers for your help all of you ,all the brakes were rebuilt about a month ago ,when i start the car in the mornings it is very lumpy and cuts out and is a pig to start i need to hold the throttle down a bit but after a minute its fine . it is quite nippy but runs out of steam on the hills and for quick acceleration you got to floor it in every gear
 
hi unless you keep the rev's high its sluggish ,the tappets are a bit tappy but i read that they are shimmed so dont no what to do with them ,the oil is fully synthetic but not sure what type ....... cheers
 
hi unless you keep the rev's high its sluggish ,the tappets are a bit tappy but i read that they are shimmed so dont no what to do with them ,the oil is fully synthetic but not sure what type ....... cheers

You read wrong, 899 are hydraulic.

If they are tappy, engine needs a flush.

Fully synthetic is possibly too light for an 899. 10W40 or 15W40 only.

Cheers

D
 
hi me seic is getting worse its an absolute pig to start in this cold weather ,it starts then cuts out and then i got to turn and hold the key for about 20 to 30 seconds with my foot down on the accelerator and it will splutter and miss but once it catches and rev's its ok ,iv'e ordered a new temp sensor main dealer only so i wont have it till saturday and let you all no if it works. cheers all
 
take your foot off the accelerator, it's not a carb'd engine - all you're doing is confusing the ECU (and to some ECU, flooring it whilst starting will cut the injectors off).

You should be using semi synth in that really, could explain the noisy top end. Also, if you are trying to rev the nuts off it all the time - it's going to start acting up!
 
its getting worse to start when cold ive changed the sensor on top of the thermostat and the crank sensor and it has made no difference if anything its getting worse ,if i dont hold the throttle down i cannot get it to start ,ive seen a thead that said if you try and start the engine with the lights on if the lights go out there is a bad earth how true is this ?next chance i can look at the car is this sunday as im working and i use the car to get there so its a pain every morning and night to get home , would changing the air temperature sensor in the carb and the fuel filter make a difference ? help would be much appreciated
 
In no particular order.

Your battery and/or earth are not the problem, the car is turning over fine. The starter uses far more power than anything else.

Fuel filter is a service item and should be changed anually, not anally, change it if its history is not known.

How tappetty is the engine now? Did you change the oil? Potentially the thin oil is leaking out of the tappets and you are having to pump the tappets up each time you start it to get the valves to open.

Cheers

D
 
Yeah but.. we're missing the point a bit.

Cece's car runs alright.. so anything to do with electrics or oil is a bit of a red herring at the moment. He promises to replace the oil with 10W40 semi-synthetic and change the fuel filter.. okay? :D

The problem is the car doesn't start when it's cold. It turns over okay.. just doesn't start... but when it does start, it runs fine... so it's fundamentally working okay.

This is only a fuelling issue.. since giving it throttle and cranking it for a few minutes eventually floods up the engine enough for the mixture to become rich enough for it to start.

Your "choke" is not working. I don't know if you have a carb' on the 899 jobbie or if you have injection.. but basically the car is not setting the mixture rich enough.

A carb is likely to have an automatic choke (you press the pedal once and release it .. then don't touch it.. before trying to start the car) while an iniezione is supposed to know when it's freezing cold.. but I don't know where the sensor for that lives. That's the most likely component that has failed (or the wiring to it). Hopefully someone can tell you where the beast lives.


Ralf S.
 
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hi i changed the oil to 10W40 which help the tapping ,now when i say a carb i mean its the SPI carb there is a air flow temp sensor in there would changing that help it is like its not getting enough fuel .trouble is there about 6" of snow over the car now .:mad:
 
If the tappets (on the 899 they are hydraulic) lose their oil once the engine is stopped, then the oil pressure would have to rise to lift the valves, hence why it will start after 20 or 30 seconds of pumping. Obviously the longer the car sits the more oil dribbles out. Hence why once its started it keeps starting until a longer layoff, if I am reading correctly.

I would expect that the new oil will help so will be interested in any difference.

Cheers

D
 
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hi its been awhile right its starting better but its still not right i did a compression test and heres what i got ,starting nearest the fan belt cylinder 1 was 130 psi ,number 2 was 160 psi ,number 3 was 170 psi and number 4 was 140 psi now when its going its fine funny smell out of the exhaust thats all and like ive said its not the best on fuel do you think the head gasket needs changing or maybe the vavles are not sealing and need regrinding in ,cheers all
 
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