10-15-2019, 07:19 AM | #1 |
Drives: . Join Date: Jan 2017
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Posts: 508
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Cranks Does not Fire
Long time poster but been away for a while
Have issue with my 17 1LE that we put a Whipple on it. Other day went to start and just died after it wanted to start. Condition: CRANKS like mad no issues with motor turning etc. Battery good Makes no attempts to fire whatsoever just turns turns turns... Scanner posts P0068 What is VERY INTERESTING is that any type of event I've had on this car ONSTAR is very quick to point out issues and NOTHING. I'm not getting any kind of warnings. Engine light is now on though. I tried to disconnect battery and left it about 20m didnt clear anything. Same issue. It seems confused to me. I see a lot of verbiage about MAP/MAF input voltages etc in some explanations about this code. |
10-15-2019, 09:52 AM | #2 |
Drives: Chevy Camaro Join Date: Jul 2019
Location: Dallas
Posts: 420
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The most frequent contributors to this code being set are large vacuum leaks as a result of cracked, broken, or otherwise collapsed vacuum lines and hoses. Other sources of vacuum leaks include defective intake and throttle body gaskets, EGR valve and gasket malfunctions, and vacuum operated component (brake boosters, etc.) defects. Other possible causes could include a cracked or disconnected air intake pipe, clogged air filter, a faulty TPS, MAF, and/or MAP sensor, or a defective PCM. Try cleaning the MAF sensor it's the easiest to check first.
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10-15-2019, 10:06 AM | #3 | |
Drives: . Join Date: Jan 2017
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10-15-2019, 11:08 AM | #4 |
Drives: 17 SS a8 Join Date: Feb 2010
Location: omaha
Posts: 1,678
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Is it were mine first thing is a thorough visual inspection. Look for anything unplugged. Clear that code, seems like in past projects that code would put the car into reduced power mode. Then check for low side and high side fuel pressure which you can do with hp tuners and I think with a normal scan tool. If that is good check for spark. After that it gets a little harder.
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dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
10-15-2019, 11:53 AM | #5 | |
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Quote:
I recently moved so that HP Tuner interface from my Whipple kit is AWOL in some box somewhere havent seen it yet since the move several months ago... a little higher priority now tho! Are there any tricks like hit start and smack a pedal 4x or something? So I did encounter that low HP mode once at Milan Dragway missed a shift and over rev'd and Onstar caught that and ruined my day (didn't know til later why the damn car was so slow.) LOL |
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10-15-2019, 11:55 AM | #6 |
Drives: 2016 Camaro 2SS M6 Join Date: Mar 2019
Location: Raleigh
Posts: 56
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is the getting adequate pressure on the high side of the DI fuel pump? I know the longer crank of the LT1 is usually because of the cam driven DI pump building pressure.
Motor trend (or maybe is was car and driver) reported a 30 second crank time when the ambient temperature was in the single digits. |
10-16-2019, 02:39 PM | #7 |
Old school tech
Drives: Ruby 1LE - 2024 2SS 1LE Join Date: Mar 2014
Location: San Antonio, TX
Posts: 288
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Better start checking connections and wiring, like somethings come loose (MAF/MAP) or wires have been damaged/pinched.
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Previous Camaros: 2021 Riverside Blue 2SS/RS A10 | 2019 Riverside Blue 2SS/RS M6 | 2013 Crystal Red 1SS/RS A6 | 2010 Imperial Blue 2SS/RS A6
One & only Corvette: 2015 Stingray Z51 Ordered 2024 Radiant Red 2SS 1LE Ordered: 6/15/23 Accepted: 7/5/23 3000 - 7/5 ---> 3100 - 7/19 3300 - 7/20 --> 3400 - 7/20 -->TPW - 8/7 4300 - 8/14 --->4B00 - 9/5 DELIVERED 9/20!! |
10-16-2019, 03:12 PM | #8 | |
Drives: . Join Date: Jan 2017
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Quote:
My friend with car trailer going to haul it for me to a motorsports shop where I'll finally get the tune I should have done over a year ago. Had a nice talk with shop today I will update as this progresses. |
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10-16-2019, 03:17 PM | #9 | |
Old school tech
Drives: Ruby 1LE - 2024 2SS 1LE Join Date: Mar 2014
Location: San Antonio, TX
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10-16-2019, 06:07 PM | #10 |
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01-20-2022, 11:34 PM | #11 |
Drives: Chevy Camaro Join Date: Jan 2021
Location: Shepherd TX
Posts: 44
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What ended up being your issue?
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2017 Camaro SS TMS 416, TSP Ported Heads, Magnuson TVS2300
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01-21-2022, 09:35 AM | #12 |
Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016
Location: Ocean City, NJ
Posts: 3,121
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This probably should've gone in the forced induction sub-forum.
superchargers, tunes, and resulting problems are kind of specific once you veer away from stock. |
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