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#1 |
![]() Join Date: Apr 2018
Location: New Jersey
Posts: 29
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I am experiencing a no start on my 1990 ZR-1 with 16,000 miles. The car has power, but the starter does not crank. I don’t think it’s the vats system or the clutch switch. When I turn the ignition to start and push the clutch pedal down the starter does not engage, but the gauge shows a small voltage drop when the clutch switch is activating.
The battery is new and I tried starting with a battery booster just in case it was a power issue. No change. While it may not be related, the vacuum pump is also making an unusual grinding or clicking noise when the key is first engaged. Any advice. Is it the starter? Hope not. Sent from my iPhone using ZR-1 Net Registry |
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#2 |
![]() Join Date: Feb 2011
Location: Clayton, North Carolina
Posts: 1,133
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Do a search on DNS “Does Not Start”
My experience has been if the battery has the right CCA and is new - DNS doesn’t show up. This condition is more prevalent in a hot climate also. Other members more experienced than me will chime it and guide you. Sent from my iPhone using ZR-1 Net Registry
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Lou[COLOR="Red"][B][SIZE="4"][/SIZE][/B][/COLOR] |
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#3 |
![]() Join Date: Feb 2011
Location: Clayton, North Carolina
Posts: 1,133
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It will push start if you are in a jam! It bypasses every issue[emoji108]
Sent from my iPhone using ZR-1 Net Registry
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Lou[COLOR="Red"][B][SIZE="4"][/SIZE][/B][/COLOR] Last edited by lfalzarano; 10-30-2019 at 04:03 PM. |
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#4 |
![]() Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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The vacuum pump should cycle on and off making that noise. If it doesn’t turn off for at least a few seconds you have a vacuum leak in the Secondary circuit.
As mentioned do a search on “No start”, not uncommon. Also check the stickies under the “Solutions” thread. Lots of good info. It’s most likely the starter solenoid contacts. There is also a mod to add a relay on 90’s to help that situation. H ![]()
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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#5 |
![]() Join Date: Apr 2018
Location: New Jersey
Posts: 29
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Thanks for the input. I will take a look. The vacuum pump turns on for a few seconds and then turns off-but it sounds different than it normally does-more of a clicking or grinding noise. Probably a different problem unrelated to the no crank.
Sent from my iPhone using ZR-1 Net Registry |
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#6 | |
![]() Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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H ![]()
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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#7 | |
![]() Join Date: Dec 2003
Location: Arcadia,OK
Posts: 3,385
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The correct way to start is to depress the clutch pedal fully BEFORE turning the ignition switch to start. This way, the contacts are engaged before the voltage is applied. I would suggest you bypass the clutch safety switch, only as a test to verify the switch.
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Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
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#8 | |
![]() Join Date: Apr 2018
Location: New Jersey
Posts: 29
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Thanks for the input. I will give that a shot. Sent from my iPhone using ZR-1 Net Registry |
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#9 |
![]() ![]() Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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You mentioned the voltage gauge reacted slightly to turning the ignition switch. That could mean the starter solenoid is activated, but the high current contacts inside of the starter may need to be replace; a common problem with the Denso starters (with 20-30k miles).
Replacement contacts are easy for a DIY project, once the starter is removed, and cost under $10 for a kit with just the copper contact lugs. (NOTE: Some kits include a new armature and contact ring (attached). I caution you that the thrust pins on some replacement armatures are too short, resulting in the pinion gear not fully engaging with the ring gear. However, the copper contact ring can be resurfaced with a little emory cloth - and the armature reused, no problem!))
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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#10 | |
![]() Join Date: Nov 2016
Location: Southlake, TX
Posts: 587
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Bill Schroeder Texas Proud! 1991 Corvette ZR1 #1388 2015 Challenger Scat Pack Shaker ![]() |
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