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#1
04-17-2011, 09:11 PM
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99 tahoe no spark or start
ive got a 99 tahoe that wont start ,was running earlier ,but now wont start.engine will turn over , just wont fire.changed the coil,cap ,rotor, and crank sensor , but still no spark.checked fuel and pump both are ok.pulled #1 spark plug and no spark.also checked to see if distributor is working properly,seems to be ok .now im stumped .any suggestions please
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1995 s10 ls 2-12 ascendant mayhem woofers dc 7.5 pioneer avhp 4100dvd autotek eq cdt 6.5 componants scosche wires batcap 4000 kinetik hc 2000 dc 175.4 4 channel amp 152.8 db certified loudest truck on the westcoast without a wall or blowthru and 2 batteries 
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#2
04-17-2011, 10:34 PM
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Re: 99 tahoe no spark or start
Need to check for 12v at the coil with the key in the run & start positions. If you don't have it, it could be an Ign Sw issue (common) or wiring or fuses.
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57 Chevy 210 65 Olds 442 Convertible (Another one sold) 75 GMC Vandura 3/4 Ton 1999 K2500 Old Body Style Suburban (Gone but not forgotten) 05 Dodge Ram 3500/5.9 Cummins 2012 Toyota FJ Cruiser
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#3
04-17-2011, 11:47 PM
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Re: 99 tahoe no spark or start
it was coil and ignition mod but now it runs rough and check engine light is on
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1995 s10 ls 2-12 ascendant mayhem woofers dc 7.5 pioneer avhp 4100dvd autotek eq cdt 6.5 componants scosche wires batcap 4000 kinetik hc 2000 dc 175.4 4 channel amp 152.8 db certified loudest truck on the westcoast without a wall or blowthru and 2 batteries
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#4
04-18-2011, 10:44 AM
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Re: 99 tahoe no spark or start
I see you replaced the crank sensor. This usually requires a "crank variation learn" procedure. Needs a high end scan tool in the hands of a knowledgeable technician.
Also with the CEL on there are active codes. What are they?
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57 Chevy 210 65 Olds 442 Convertible (Another one sold) 75 GMC Vandura 3/4 Ton 1999 K2500 Old Body Style Suburban (Gone but not forgotten) 05 Dodge Ram 3500/5.9 Cummins 2012 Toyota FJ Cruiser
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#5
04-18-2011, 12:48 PM
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Re: 99 tahoe no spark or start
Put old crank sensor back in still runs. Runs fine over 70. But under sputters and back fires. Pulled number 1 plug looks like engine has been running lean for some time. Going to replace plugs and wires and scan code
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1995 s10 ls 2-12 ascendant mayhem woofers dc 7.5 pioneer avhp 4100dvd autotek eq cdt 6.5 componants scosche wires batcap 4000 kinetik hc 2000 dc 175.4 4 channel amp 152.8 db certified loudest truck on the westcoast without a wall or blowthru and 2 batteries
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