Gre3D
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| posted on 2/3/17 at 08:19 AM |
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2.0 duratec ST vvt problem
hi guys,
here's a problem i'm having. a direct copy of the mail i sent to motorsport electronics.;
The car runs perfectly smooth without the vvt controller connected to the wiring.
But when i plug it in ( it's wired up ok and it works) but the engine stalls at certain points in the rpm range ( not always the same rpm/effect
) i wired it up with shielded wire for all sensors, even the power feed and the wiring to the solenoid is shielded wire. Sometimes i see the rpm on my
digital dash peak to 10.000 rpm when it is happening ( when it is more around 3/4000 rpm) the digital dash is wired to the dis coil. Megasquirt seems
to not have that problem with the rpm's (from flywheel sensor & also shielded wiring) the shield on the wires is connected to ground on both
sides.
Any idea's on what may cause my problem?do Keep in mind that the car runs perfectly with the vtt controller not hooked up to the wiring, so even
though it's a base map i dont think that could cause the problem.
Hoping you can help me out!
------
so any idea's on here? the people know what i'm experiencing the more chances i have of getting it fixed!
tonight i'll try and do some test runs with the scope hooked up to the coil, but it's raining and windy and my littles test road is
covered in mud and horse sh*t so i'd rather not have to do many testruns 
greetz!
Frederik
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Dusty
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| posted on 2/3/17 at 09:53 PM |
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The only obvious thing to mention first off is that when using shielded wires only one end of the shielding should be grounded, never both ends.
Is your engine a Zetec St170 badged Duratec on the cam cover or is it a proper Duratec?
Can you post the cam advance table on here in some form?
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Gre3D
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| posted on 4/3/17 at 08:34 AM |
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thanks for the reply.
i thin i might have found the problem. nothing to do with the vvt controller though! i think it was my own fault...
i found the cooling fan relay ground control short out with the launch control ground control. so when the fan was on, so was launch control... had a
hard time figuring that out...
well it goes like crazy now. even with calculated base maps i think it's faster then my 2016 focus RS. 
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