SCV wiring loom

[Turdous]

Hi all again, just wondering if there is a common area on the Suction Control Valve harness that leads to an open circuit, as i changed the SCV and Frp and went for a drive and even worse now. So reverted to the old FRP and running lovely at high speed, tickover sounds like a box of spanners. Forscan tells me i have to fix the open circuit on the SCV before i can do any of the learns.

[karl]

where you get your parts from ?

also you sure the plug is back on correctly

[Turdous]

Well i gave ebay a chance, scv seems to be working ok but i changed one at a time to see if it improved it, same issue after fitting scv, then tried the fpr and drove 4 miles and on the return it sounded like i wasnt gonna get home from tesco, the cog lite up along with traction control which i couldnt turn off, made it home and put old one back on. Running really nice except for the low revs. i did notice when reaching down to the scv socket and playing and wriggling with the wiring i got a mild shock. so i have a feeling this is where the problem is, teach me to pay more attention to the condition of the wiring down there. £40 for scv which by the standards on here is cheap and nasty, but surely they must work as they have sold so many, maybe not the same longivity. but i'll take it all apart again tomorrow and see if i can find the culprit, before this all started i had put a new head on it, gaskets, oil cooler, filters and an injector and was running sweet and a couple weeks later i noticed an intermitant fault which at the time seemed it was an injector on its way out, but a few days ago i got the clanking from one or 2 of the injectors, i put forscan on it and it said inbalance of cylinder 3 and 4 and fuel metering stuck open. but after changing there is a constant open circuit on the svc.

[karl]

you do know when you change these parts you need to software update the van

you need to pcm update only required if a new calibration file available, BUT you need to do the pump and injector pilot learn to sort the rough idle out, and in the process of this it will tell you if the injectors are faulty or not . basically the computer says no


also my advice is not buy ebay parts as they are copies, you can tell if you know what you looking for

[knobby1]

What Karl said....SCV & PRV should be genuine Ford items or you'll be buying them again. A full set of learns must be done also...or it will never work properly.
We've had poor results with using the Ebay specials....9 times out of 10 the learns will fail.

Lord Knobrot

[andz327]

THROW YOUR NEW PRV IN THE BIN YOU JUST WASTED YOUR MONEY
AND PROBABLY THE SCV TOO

DOUBT VERY MUCH THAT YOU GOT A SHOCK FELLA

[loot]

Simple test, put old valves back on and clear codes then see if it is how it was. Then buy genuine and do the updates.