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The Pub For General Automotive Related Talk |
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27-11-2010, 01:49 AM | #1 | ||
FF.Com.Au Hardcore
Join Date: Feb 2008
Location: Perth, Northern Suburbs
Posts: 5,033
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My son and I bought a Jeep Cherokee at Auction last week.
(Down the track he is very keen on a I6 transplant, but that’s another story.) Couldn’t get the bugger started. Cranked fine, plenty of fuel (judging by the smell) but no spark. Discovered it was fitted with an immobiliser. Took some research and emails to identify it, and got a wiring diagram. Used a good quality copper wire to bridge the immobilised circuits. Nada. Research on the net indicated that the Crank position sensor is often a culprit, so tested it but seemed ok. Tested the coil, seems ok. Tested the distributor pulse signal, seems ok. Downloaded the complete FSM, which answered a few questions, but still no spark. Basically narrowed it down to no ground signal coming from the ECM. This is the circuit that was immobilised, so we bypassed the immobiliser circuit altogether. Nada. So after more than a week, hours of research, and testing anything and everything multiple times, we were at our wits end… Just doing some mundane resistance testing to ensure everything was still connected, and to ensure that a signal could get from the ECM to the coil. Didn’t work. This didn’t make any sense! We re-tested A to B, fine. Re-tested C to D, fine. B and C are wrapped together by aforementioned copper wire, so naturally A is connected to D? Nup. In desperation tried testing the copper wire… WTF?! It appear the copper wire is sealed or varnished in some way (presumably for use in coils.) It’s impossible to see, but the wire’s surface has zero conductivity. Used some regular copper wire to replace the very first bridge, and bingo. Runs like a charm.
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2024
Making Whine from the Tears of Hippies |
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27-11-2010, 10:12 AM | #2 | ||
Browsing here and there..
Join Date: Aug 2009
Location: Melbourne, Victoria
Posts: 2,075
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omg so funny!!!!
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27-11-2010, 02:05 PM | #3 | ||
XF 393 3v CHI heads
Join Date: Nov 2005
Location: Perth
Posts: 1,437
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haha where did you get the copper wire from? normally the varnish is for motor windings or small transformers haha nice bit of fault finding, i bet you were proud of yourself
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XF Falcon, 393 Clevo. 11.01@123mph "RAZNREVNU" |
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27-11-2010, 02:13 PM | #4 | ||
Clevo Mafia Inc.
Join Date: Dec 2004
Location: Melbourne
Posts: 10,496
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How frustrating, you have more patience than I do.
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27-11-2010, 02:43 PM | #5 | ||
Former BTIKD
Join Date: Mar 2005
Location: Sunny Downtown Wagga Wagga. NSW.
Posts: 53,197
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Well done working it out, but didn't you try to start it before you bid on it?
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Dying at your job is natures way of saying that you're in the wrong line of work.
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27-11-2010, 02:59 PM | #6 | ||
FF.Com.Au Hardcore
Join Date: May 2009
Posts: 1,013
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good on you for finally finding out what wrong,,but remind me to never ask for you help if im tring to steal a car with an immobiliser
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27-11-2010, 06:00 PM | #7 | ||
Cruising...
Join Date: Aug 2009
Location: Perth
Posts: 3,819
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Nice, i admire your patience. I probobly would have ripped the motor out and put in that I6 already.
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FBT '98 BA XT '04 F100 4x4 '82 Subaru Outback '02 |
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27-11-2010, 06:18 PM | #8 | ||
FF.Com.Au Hardcore
Join Date: Feb 2008
Location: Perth, Northern Suburbs
Posts: 5,033
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My son picked up a big roll of this wire when someone was throwing it out.
Car was bought at damaged car auction, but I’m actually very impressed with its condition. We assumed the engine would be rooted, but it runs well, no smoke and heaps of power. And yeah, when it comes to immobilisers, I must be the world’s slowest car thief.
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2024
Making Whine from the Tears of Hippies |
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27-11-2010, 06:44 PM | #9 | ||
71Mach1
Join Date: Feb 2007
Location: Melb
Posts: 465
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all experiences are good experiences (as long as you survive them of course!)
just put this down to a free lesson for the rest of us ...thank you.
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roses are #FF0000 violets are #0000FF all my base are belong to you |
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27-11-2010, 09:40 PM | #10 | ||
Making superman jealous
Join Date: Feb 2010
Location: Bondi
Posts: 1,323
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its always the simple things we overlook
How much did you get it for? year?
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If life deals you lemons dont complain just get on with it and make lemonade 2006 SY Territory Ghia AWD in ego with roof mount DVD, tints, 7 seats, iPod input 2005 Crewman Cross 8 with 350 cubic inches, AWD, black on black rims on black leather, tints and polished racks NEW TOY Bayliner 185, inboard 3L 4 cylinder pushing us along at 50MPH whenever i get a chance I love Aussie cars and are gonna really miss them soon....... |
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28-11-2010, 01:02 AM | #11 | ||
E-series fan
Join Date: Sep 2005
Location: Brisbane, Qld
Posts: 280
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Haha, I can imagine the jubilation when it cranked.
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E39 523i EF Fairmont |
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29-11-2010, 02:53 PM | #12 | |||
FF.Com.Au Hardcore
Join Date: Feb 2008
Location: Perth, Northern Suburbs
Posts: 5,033
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Quote:
About $2k all up, which is a bargain in WA. Really impressed with the engine, he's just not looking forward to the fuel bills. Hence future plans for the AU engine.
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2024
Making Whine from the Tears of Hippies |
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