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Registered
Join Date: Aug 2000
Location: Deep in the bowels of UCLA hospital
Posts: 2,316
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how do I check a coil
my engine won't start...I am getting fuel...
my battery was dead and is on a trickle charger... My suspects are battery CDI coil I followed bentleys ignition testing steps all the wiring i ok..they had me test the voltage pulse... but gave no good procedures how to test the box and the coil directly... I think I read you cannot test a box with a multimeter...but what about the coil?? thanks MJ |
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03-12-2003, 10:05 AM
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Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
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i would like to know how to test a coil too...i have suspicions about mine. so here is a friendly bump.
I thought i wasnt getting spark one time...so I hooked up my timing light. Easy enough. So then I thought i wasnt getting fuel...so I yanked the first injector, turned the key to get the fuel pump on, and slowly lifted the air sensor plate to get some gas flowing thru the injector.
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Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
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03-12-2003, 12:11 PM
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Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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Do a search of the 911 forum on keywords "test cdi coil" ...
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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03-12-2003, 12:37 PM
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Registered
Join Date: Nov 2002
Location: gatlinburg tn
Posts: 752
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a coil might give good readings at room temperature and be worthless at operating temp.
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72 911t grey/black mine 74 914 2.0 black/ tan hers 02 g500 black/black womanproof 01 f250 psd dirty the mule 60 correct craft starflite cool 69 correct craft torino hauls butt 72 correct craft ski nautique fun 66 vw 1500s will finish someday |
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03-12-2003, 02:54 PM
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Registered
Join Date: Apr 2001
Location: Linn County, Oregon
Posts: 48,529
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I would like to suggest a book to buy. It's probably a kindergarten text to someone with Warren's skills, but I've found it very useful. Published by SEARS, it's titled: "A simple and comprehensive guide to Multitesters and their use for electrical testing." Sears catalog number is 34 82303. Page 110 gives a multitester coil test...Whatever you do, DO NOT try to test the high voltage outlet with your multitester...all testing done with keys to the car off and in your pocket...
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03-12-2003, 02:57 PM
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Registered
Join Date: Dec 2002
Location: Dahlonega , Georgia
Posts: 14,608
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I may be wrong but I believe local auto parts stores will test them for you,but like stated above this is only in a cold condition,may be different when hot.
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2002 Boxster S . Arctic silver + black top/int. Jake Raby 3.6 SS engine " the beast ". GT3 front bumper, GT3 side skirts and GT3 TEK rear diffuser. 1999 996 C4 coupe black/grey with FSI 3.8 engine . Rear diffuser , front spoiler lip with ducktail spoiler . |
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03-12-2003, 04:02 PM
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Registered
Join Date: Aug 2000
Location: Deep in the bowels of UCLA hospital
Posts: 2,316
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thanks for the suggestion on the book
I am moron when it comes to car electrical systems thanks MJ |
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03-12-2003, 06:02 PM
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Registered
Join Date: Apr 2001
Location: Linn County, Oregon
Posts: 48,529
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Quote:
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03-12-2003, 06:05 PM
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Senior Member
Join Date: Feb 2000
Location: Lacey, WA. USA
Posts: 25,310
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If you think YOU'RE a moron, read my recent threads.
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Man of Carbon Fiber (stronger than steel) Mocha 1978 911SC. "Coco" |
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03-12-2003, 07:42 PM
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Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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Don't worry, Jim ... now you have some spares you needed for your toolkit, anyway! These days, on our cars, ignition system spares are one way to avoid having to be towed and paying for a $700 repair bill in some town you didn't want to stop in, and don't want to spend the night in!
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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03-13-2003, 02:25 PM
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Senior Member
Join Date: Feb 2000
Location: Lacey, WA. USA
Posts: 25,310
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Thanks, Warren. For a champion cheapskate, I feel unexpectedly good. Spare CD and matching coil, and NEW distributor.
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Man of Carbon Fiber (stronger than steel) Mocha 1978 911SC. "Coco" |
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03-13-2003, 02:53 PM
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