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Old 02-05-2017, 05:47 PM   #1 (permalink)
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Unhappy Suzuki Carry G13BB No Spark replaced everything

Good Day everyone this is my first time posting to this forum. I have a 2002 Suzuki Carry G13BB with a no spark issue, before completely failing only one coil pack was firing, wouldn't start then no spark at all. I've replaced Crank sensor and both ignition coils, still no spark, checked all wires running to the coils, crank and coil sensors there ok. Finally I changed the cam sensor then voila, spark but the engine still won't fire, just backfires. Then after about an hour or so of troubleshooting again no spark. Got another cam sensor and spark returns but it got dark so I left it till the next day. Next Day no spark. I'm stumped, could something be killing the cam sensors? Is it the Ecm? Any help is greatly appreciated.
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Old 02-06-2017, 12:37 PM   #2 (permalink)
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Check the power and grounds to the ECU, you might be losing the reference voltage...

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Old 02-07-2017, 08:33 AM   #3 (permalink)
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Thanks, going to check those now
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Old 02-07-2017, 10:09 AM   #4 (permalink)
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I checked all the wires from the ECU to the Coils and Cam and Crank Sensors, they check ok for continuity. With key on I'm getting the 12v and the 5v for the cam, and getting power to the crank and coils. The trigger wires from the ecu to the coils check ok for continuity. I'm stumped, any other ideas?
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Old 02-07-2017, 10:35 AM   #5 (permalink)
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Back to basics:

Have you conducted a compression test to verify engine condition and engine timing?

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Old 02-07-2017, 11:26 AM   #6 (permalink)
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No, I'm just going off the assumption that all was well before the no spark issue. My mind keeps going on timing, timing belt is ok, and I think it's unlikely that timing jumped but then again the engine not being timed correctly would still not create a no spark issue, Would it?
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Old 02-07-2017, 11:32 AM   #7 (permalink)
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YES! If the CAM and Crank are not synchronized..

I would not make assumptions, You also talked about a backfire..

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Old 02-07-2017, 11:47 AM   #8 (permalink)
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ok, Ill make up my mind to crawl under there and check, know it's gonna be a PITA messing with those coolant hoses
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Old 02-07-2017, 01:53 PM   #9 (permalink)
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No Need to crawl under, if the comp is low across the bank, the engine timing is compromised..

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Old 02-07-2017, 03:19 PM   #10 (permalink)
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Compression seems ok with the exception of number two cylinder being low.

Compression on cold engine WOT

#1 175psi #2 95psi #3 145psi and #4 180psi
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