displaying posts 1 to 6 of 6

Author Subject: Strange issue i have encountered
fatlapit

Seasoned Pro

Location: STOCKSFIELD

Registered: 02 Nov 2010

Posts: 3,040

Status: Offline

Post #1
Some of you may know i blew 3rd at fcs. I have changed my box. Easy bit done. So i fire her up and shes horrible and not happy. Miss firing not idling being a general pita. So i think vacuum leak and wiring. Either aomething ive not connected or somethings not tight. Nope non of that. So then i started to pressure test all the componants engine side of the tb. Er no problems. So i put her back together again. Still being a b**ch. So i thought hmmm ill plug the laptop in. Nope everything fine there. ffs wat can it be. So i started speaking to my next door neighbour. He says youve not get anything sensetive close to the fly wheel??? No i dont think so. So any way put her away thought nothing of it. So the next day i wiggled some wires and boom fixed awesome i thought. Took her for a test drive. Everything fine on boost iff boost and cruise all spot on. So i thought get home n wash her. So she decided to play up. This time fine on boost horrible for everything else. I get home let her cool and open the bonnet. Instantly looked at the flywheel area. Crank plug sitting right where a plastic bung for the bell housing should be. So i un plugged it and re routed the wiring. Turn the key and shes spot on.


Who would of thought thats the fault?? Must of been scrambling the signal. Totally crazy.

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Posted 29th Jul 2015 at 19:51
rich_w

Seasoned Pro

Location: Havant, Hampshire

Registered: 29 Jul 2004

Posts: 5,412

Status: Offline

Post #2
The crank sensor is very prone to interference being a hall effect sensor. They have a shielded twisted pair cable as standard. What cable has been used on your new loom? If it's not a shielded cable with seperate earth into the ECU for the crank sensor that will be the issue Smile

________________________________________

Contact Details:

rich@lynxpowerengineering.co.uk
07732 822546

Posted 30th Jul 2015 at 18:45
fatlapit

Seasoned Pro

Location: STOCKSFIELD

Registered: 02 Nov 2010

Posts: 3,040

Status: Offline

Post #3
Its a standard omex loom bud. Ive just re routed the wiring.

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Posted 30th Jul 2015 at 18:57
rich_w

Seasoned Pro

Location: Havant, Hampshire

Registered: 29 Jul 2004

Posts: 5,412

Status: Offline

Post #4
It would be worth checking to see if you wiring is shielded. Also check to see the cable on the crank sensor isn't damaged Smile

________________________________________

Contact Details:

rich@lynxpowerengineering.co.uk
07732 822546

Posted 30th Jul 2015 at 21:35
adam b

Seasoned Pro

Location: The Nam

Registered: 24 Jan 2006

Posts: 12,828

Status: Offline

Post #5
Check the connectors in the plug too as they can push back into the plug

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Nothing to see here
Posted 30th Jul 2015 at 21:48
fatlapit

Seasoned Pro

Location: STOCKSFIELD

Registered: 02 Nov 2010

Posts: 3,040

Status: Offline

Post #6
Well ive had it plugged in and 2 more sensors. Gotta be the flywheel effecting the signal

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Posted 30th Jul 2015 at 21:59

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