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    Thread: car wont start when warm/after driven

    1. 02-02-2012 05:04 PM #1
      Ok heres the deal. My car starts fine in the mornings, and after i let it sit for like 3 hours. But if i go to the store or something like that, and get back into it it wont start, it cranks, and wants to start but it just wont. This is ONLY after it is driven. The battery cables and everything are fine. Its really weird. I was thinking maybe crank position sensor is going bad, im not throwing any codes for anything so has anyone had this problem? I dont want to buy parts that i dont need. Also, to check the crank position sensor it would be a resistance test correct? What is the specification? Thanks guys!
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

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      02-02-2012 05:49 PM #2
      Quote Originally Posted by Mindfault View Post
      Also, to check the crank position sensor it would be a resistance test correct? What is the specification? Thanks guys!
      I just put that in another thread, see here: https://forums.vwvortex.com/showthrea...-Input-Circuit

      PS - I did hear about a CPS that crapped out when it was hot, but was fine when it was cold.

    4. 02-02-2012 07:23 PM #3
      Thanks for the link. It just seems to me like it should throw a code for ckp. But. Ill test that tonight i suppose
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    5. 02-02-2012 07:32 PM #4
      So i just tested my ckp. And 1-2=o.l. 1-3=o.l. and pins. 2-3 = .841k ohms. I think that is out of specification
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    6. 02-02-2012 07:41 PM #5
      This test was after cooling down, so i will be checking after i drive it home tonight
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    7. Member
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      02-02-2012 10:08 PM #6
      Quote Originally Posted by Mindfault View Post
      So i just tested my ckp. And 1-2=o.l. 1-3=o.l. and pins. 2-3 = .841k ohms. I think that is out of specification
      No, .841k == 841, so it's right in the middle of 730 and 1000 ohms. In spec, at least when it's cold.

    8. 02-02-2012 10:26 PM #7
      Quote Originally Posted by Mindfault View Post
      Ok heres the deal.
      There is no deal here, at all....



      Moving on, when the car isn't starting, is the tach moving? It'll take 2-3 second of cranking before it should move...
      Canadian Immo 2 and 3 defeat service, PM for more information.
      Vag-Com Scanning available in London area, Hex+Can.

    9. 02-02-2012 10:39 PM #8
      Yeah i meant to say in spec. Even when warm its at 900 ohms. So the ckp is good. I dont know what else could cause it. Its only doing it when its warm. Its weird
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    10. 02-02-2012 10:39 PM #9
      Kinda sucks haha
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    11. 02-03-2012 12:07 AM #10
      So ruling out the ckp, i believe it could be cts, and other research has led me to the deletes with the uni file. All the deletes are resistored and ill be checking that all soon. Hopefully its one of these things mentioned
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    12. 02-03-2012 12:18 AM #11
      Sure, Move on.... No problem...

      Crank posistion sensors usually fail when they're cold anyway... kinda like your no start issue.... Ohhh wait...
      Canadian Immo 2 and 3 defeat service, PM for more information.
      Vag-Com Scanning available in London area, Hex+Can.

    13. 02-03-2012 12:36 AM #12
      ?
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    14. 02-03-2012 12:56 AM #13
      Do i reeeaaallly need to spell it out for you?

      Do the simple test that i mentioned, if it PASSES, THEN Scratch it off the list.
      Canadian Immo 2 and 3 defeat service, PM for more information.
      Vag-Com Scanning available in London area, Hex+Can.

    15. 02-03-2012 01:08 AM #14
      Oh haha yeah the tach moves, haha. I knew that already. Haha. It JUST started doing this after the cylinder head being put on. Never had this issue before
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    16. 02-03-2012 01:19 AM #15
      The the tach moves, but the car will still not start?

      The only other thing that i know looks for the engine movement is the Cam posistion sensor, Ohm that and etc.
      Canadian Immo 2 and 3 defeat service, PM for more information.
      Vag-Com Scanning available in London area, Hex+Can.

    17. Member burkechrs1's Avatar
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      02-03-2012 11:58 AM #16
      Mine does the same thing. I never had the issue til I switched to uni stg 2 with all the deletes. My CTS is good and crank position sensor is good too. Maybe it is the tune?

      Sent from my DROID2 using Tapatalk
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    18. 02-03-2012 03:07 PM #17
      But all of these things would throw codes. This is nuts
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    19. 02-03-2012 03:08 PM #18
      Im going to do a starter voltage drop and see what is going on. Maybe my starter cant handle it anymore when ots warm
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    20. Member IAmTheNacho's Avatar
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      02-03-2012 03:16 PM #19
      Mine has done the same thing since the head/cams. I put a newer cps that I had in my pile of parts and it seems to be better but still does stumble if I try and start the car say 3-5 minutes after shutdown from a normal 30 minute drive. I think it has to do with cams. It will start every time if you pull the coolant temp sensor. Replaced that it still does the same thing.
      Quote Originally Posted by VDub Dan-O View Post
      I am in the process of going FrankenTurbo and pretty much got my dick slapped because I wasn't thinking BT.

    21. 02-03-2012 03:32 PM #20
      So nacho, if i unhook my cts it will start if i try when its warm? Yeah i thought it was the cams too, or the stiffer springs. Like my starter doesnt wanna turn that much. High torque starter maybe? Are u still with just the intake cam nacho?
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    22. Member IAmTheNacho's Avatar
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      02-03-2012 05:28 PM #21
      Yeah still the autotech intake cam. Its not as aggressive as most but I dont pull the vacuum I did before the cam Now its about 16 In.Hg. instead of 22ish. at idle. It will pull 22 on decel just not at idle. No codes. Its not as bad as it was when I first put the car together in June though.
      Quote Originally Posted by VDub Dan-O View Post
      I am in the process of going FrankenTurbo and pretty much got my dick slapped because I wasn't thinking BT.

    23. Member ldaledub's Avatar
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      02-04-2012 09:31 AM #22
      i dont know if its been said but when the no start issue happens have you tried unplugging the injectors getting in the car turning it over to see if it will kick over then get out of the car plug them back in and see if it starts then?... i have this issue ive decided i m getting to much fuel on start up and the car is flooding out. aeb with unitronic tune for ie street cams ill have to write them an email or call bc its been an on going issue ever since the install. i know its a new file and they probably havent worked out all the kinks yet.
      CTS turbo,UNI,USP, Integrated eng.,Labonte motorsports,ESEtuning.

    24. Member burkechrs1's Avatar
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      02-04-2012 01:10 PM #23
      I found my problem. I was running a 4bar on Uni Stg 2. Switched in the 3bar and it hasnt happened since.

      Either lucky coincidence or that was it.

    25. 02-04-2012 03:56 PM #24
      The wierd thing is is that it will crank right over if being jumped. Also i switched the battery out with a different one, it started 3 times fine, tnen it does the same thing.
      Unitronic830cc/Racetronix 846cc flowmatched injectors/HP6262SP-b/ TurboSmart Race Port/PrecisionPW39/TurboSmart MBC/Snow W/M Injection/IE Rods/AEB pistons/ARP Main cap studs/ARP headstuds/3" turboback/ FMIC/Custom fuel surge tank/ Wally 255/AEB head/supertech single keeper valves/ IECVA1 cams/IE valve springs and retainers/034 motor mounts. SPEC Stg 4 6 puck clutch, Vr6 lightweight flywheel. KRM intake manifold/80mm tb

    26. Member
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      02-04-2012 07:34 PM #25
      Quote Originally Posted by Mindfault View Post
      The wierd thing is is that it will crank right over if being jumped. Also i switched the battery out with a different one, it started 3 times fine, tnen it does the same thing.
      Check your grounds; stud under the battery and ground strap to the motor.

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