FastBarney
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 posted on 25/8/07 at 04:31 PM |
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zetec engine stuttering
Hey
I am using a ztec 1800 with standard ecu and components , just a other manifold from griffin power
But the engine is stuttering holding back between 1000 and 4000 rpm
When i try to rev it from 1000 up is wants to drop out. But when i play with the throttle i can rev it but it stutters. once up 4000 rpm it runs fine
and does everything good
When it open the trothel fully one it's running stationary, it's seems that te engine must swallow and almost droping out and than revs
up and then there is a flame and a bang out of the exhaust.
SO i was thinking of ignition problems
I changed the ignition cabels from an other engine (i don't now of ther are good)
but he stil got it.
WHen got the spark plugs out last week when i change them they where black so that is very rich. But that was when he didn't cama ot of the
garage yet.
So i don't have a clue anymore
And thes is the only thing that keeps me of the road after a rebuild from over a year ??
I hope you guy's can help me
thanks
cheers
melvin
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stevebubs
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| posted on 25/8/07 at 04:42 PM |
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plugs & leads would have been the first things I changed. Are you sure the ones you're running are good?
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saigonij
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| posted on 25/8/07 at 05:46 PM |
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sounds like the throttle pot sesnor on the throttle body....
they can wear at the lower end, causing mis readings etc.. sometimes the ECU will read it as fully closed, or fully open when its only partially
open...
try watching the rising voltage to see if it splikes or is not uniform...
or, it coudl be a leak after the throttle body somewhere... spray with wd40 to see if it bubbles anywhere...
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FastBarney
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| posted on 25/8/07 at 06:02 PM |
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Throtthelbody works good
i checked it last week.
I going to change the leads at monday
so that is something a am sure of that ist's fine
Could it be the lambda sensor? that doesn't work properly ?
thanks
cheers
melvin
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big_wasa
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| posted on 25/8/07 at 07:03 PM |
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my money is on it running lean due to an air leak.
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FastBarney
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| posted on 26/8/07 at 04:50 PM |
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Lookt this afternoon searching for a leak
I think there was a smal leak on the first injector. I replaced teh sealings last weak.
So i think the manifold isn't perfect fit on that place. I put some sealing on, that wil we fully dry to morrow.
Will see, i hope it wil be that
cheers
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