Fuel/Injection Issue?!? Please help a newbie in need!!

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RandollS
1.6 8v
Posts: 10
Joined: Sun Jul 26, 2009 7:31 pm

Fuel/Injection Issue?!? Please help a newbie in need!!

Post by RandollS »

Hi all,

Symptoms - Randomly - Spluttering for a second then dying usually after low idling, lack of power etc.

Have done so far -

Crank Sensor
Idle Control Valve
Coolant temp sensor
Cleaned Lambda Sensor
Cleaned fuel rail and cleaned outside of injectors
Changed spark plugs & checked coils
Changed Fuel filter and removed and checked fuel pump

The problem... Its still doing it!!!!! :evil:

No ive got a feeling its fuel related somewhere along the line as when i spray a very small amount of carb cleaner into the air intake it splutters just as it usually does and then stalls. I beleive i am correct in thinking it should rev normally when i do this?! Does this mean its running very rich? If so whats the next step?

Please can someone help me with this or suggest where to go next? Im reluctant to pay £45 on a diagnostic until i have checked all i can check.

Its a '96 1.8 16V.

Many thanks :mrgreen:
teamster1975
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Re: Fuel/Injection Issue?!? Please help a newbie in need!!

Post by teamster1975 »

I'm still thinking Lambda sensor, if it's failed or gone intermittent then cleaning it won't really help.
1996 406 1.8LX Got a bad case of hydro lock!
1996 406 Executive 2.0 Turbo XU10J2TE No longer hangin' on in there :(
1997 Honda CB500V
2003 Volvo V40 1.8 GDi SE killed by a nutter in a beemer 5 series
2008 Mondeo 2.0 TDCi Titanium X

"Always look on the bright side of life, dedo, dedo dedodedo"
RandollS
1.6 8v
Posts: 10
Joined: Sun Jul 26, 2009 7:31 pm

Re: Fuel/Injection Issue?!? Please help a newbie in need!!

Post by RandollS »

Thanks for reply.

However i beleive i read in another post that you can unplug it(Lambda) and the ECU doesnt know any better, i did this and yet it still cut out as usual. If it is faulty should the engine run ok if unplugged?

Thanks
teamster1975
Site Admin & Mad Biker!
Posts: 6277
Joined: Sun Oct 28, 2007 8:07 pm
Location: Woking, Surrey

Re: Fuel/Injection Issue?!? Please help a newbie in need!!

Post by teamster1975 »

Have a look here, quite an interesting read.
1996 406 1.8LX Got a bad case of hydro lock!
1996 406 Executive 2.0 Turbo XU10J2TE No longer hangin' on in there :(
1997 Honda CB500V
2003 Volvo V40 1.8 GDi SE killed by a nutter in a beemer 5 series
2008 Mondeo 2.0 TDCi Titanium X

"Always look on the bright side of life, dedo, dedo dedodedo"
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steve_earwig
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Location: Jastrebarsko, Croatia http://www.jastrebarsko.hr/lokacija/

Re: Fuel/Injection Issue?!? Please help a newbie in need!!

Post by steve_earwig »

RandollS wrote:However i beleive i read in another post that you can unplug it(Lambda) and the ECU doesnt know any better, i did this and yet it still cut out as usual. If it is faulty should the engine run ok if unplugged?
Fuzzy logic? Your car will go wrong if you unplug it, it's doing that already, so if it makes no difference then it's probably broke.
Unskilled meddling sin©e 2007

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RandollS
1.6 8v
Posts: 10
Joined: Sun Jul 26, 2009 7:31 pm

Re: Fuel/Injection Issue?!? Please help a newbie in need!!

Post by RandollS »

steve_earwig wrote:
RandollS wrote:However i beleive i read in another post that you can unplug it(Lambda) and the ECU doesnt know any better, i did this and yet it still cut out as usual. If it is faulty should the engine run ok if unplugged?
Fuzzy logic? Your car will go wrong if you unplug it, it's doing that already, so if it makes no difference then it's probably broke.
True.

However I did have one other thought. Could the inlet air temp sensor be broken or need cleaning. Could it be thinking the air temp is cooler than it actually is, pumping more fuel into the cylinders? Then that gets flagged up by the lambda sensor?

Sorry, im kind of clutching at straws now! :(
RandollS
1.6 8v
Posts: 10
Joined: Sun Jul 26, 2009 7:31 pm

Re: Fuel/Injection Issue?!? Please help a newbie in need!!

Post by RandollS »

Mr Diagnostic said it was the MAP sensor. Quoted me £200 to change it, £80 sensor and £120 labour. :cheesy:

Considering i had taken it off and cleaned it already i dont think i will give them £120 for something as easy as that. As for the sensor I am headed to the scrappers tomorrow morning, if no luck there then £50 from Autoquip.

I hope this finally solves my problem! :roll:
RandollS
1.6 8v
Posts: 10
Joined: Sun Jul 26, 2009 7:31 pm

Re: Fuel/Injection Issue?!? Please help a newbie in need!!

Post by RandollS »

Free from the scrap yard and it fixed the problem :)
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steve_earwig
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Re: Fuel/Injection Issue?!? Please help a newbie in need!!

Post by steve_earwig »

Woohoo! Nice one (free? :supafrisk: )
Unskilled meddling sin©e 2007

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teamster1975
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Re: Fuel/Injection Issue?!? Please help a newbie in need!!

Post by teamster1975 »

Nice one Randoll! I'll copy it to the knowledge base!
1996 406 1.8LX Got a bad case of hydro lock!
1996 406 Executive 2.0 Turbo XU10J2TE No longer hangin' on in there :(
1997 Honda CB500V
2003 Volvo V40 1.8 GDi SE killed by a nutter in a beemer 5 series
2008 Mondeo 2.0 TDCi Titanium X

"Always look on the bright side of life, dedo, dedo dedodedo"
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