Car still having issues. p0300 p0173 - 3000GT/Stealth International Message Center

NeoValentine · 05-13-2008, 09:23 AM

Ok this is getting on my nerves to no end now. After spending alot of money and sending my car to FSr to get updated this is my current mods list....

94 VR4 Engine refreshed, polished crank, 60k tunes up, all new parts, bolts so on and so forth. That has been upgraded 99 Lifters, and a few mods to make it work ok with a my 96 setup
15G turbos
450CC Injectors
S-AFC-2 Tuned by FSR
AEM Wideband That read 14.9 at idle
Solid motor mounts,
Southbend TZ Clutch
Intake (Matrix)
Samco Rad Hoses
96 VR4 ECU and Harness, un cut (SAFC is using one of those harness adpaters)

Ok now Daily I get a friggin p0300. My plugs are brand new, my Spark plug cables are brand new MSD, My PTU and Coil pack are also brand new. New as in less than 4k miles. These issue occured before the engine swap and after.

Any ideas? I've checked all the connections I can check but what would DAILY cause a p0300. Could I just have a bunk OBD-II ECU? I've never heard of these having issues. Please help me I'm seriously on the verge of selling this bitch to some other sucker to get rid of it.

tarfin · 05-13-2008, 10:12 AM

OBD-II Trouble Code: P0300 Random/Multiple Cylinder Misfire Detected

NeoValentine · 05-13-2008, 12:49 PM

I've replaced everyone of those, o2 sensor are new, Plugs new, wires new, everything, I'm seriously starting to wonder if it's the ECU.

Colt45_GTO · 05-13-2008, 12:52 PM

it could be the ecu mate, its worth trying a fresh one before sending yours away. is anyone closeby that could lend you thiers to try?

NeoValentine · 05-13-2008, 12:54 PM

That's what I'm looking for now. If it is the ECU would changing the caps cure the issue possibly or would it be something else besides the caps.

Colt45_GTO · 05-13-2008, 01:41 PM

i would inspect the board mate. mine was ok round the caps but looked charred elswhere

NeoValentine · 05-13-2008, 01:43 PM

I'll take it out tonight and go over it.

2ndgen · 05-13-2008, 03:32 PM

P0173 Looks like a leak after the mass air. un-metered air.

TTstealthracing · 05-13-2008, 03:38 PM

[ p0173 [/quote]

spray the intake manifold with carb cleaner where it mounts up to the lower intake and see if the idle changes

NeoValentine · 05-13-2008, 04:05 PM

Ok I'll give that a shot.

05-13-2008, 09:23 AM	#1 (permalink)
NeoValentine MI SCUZI! MI SCUZI! Join Date: Jul 2000 Location: San Jose Drives: Twin Turbo SL Trader Rating: (43)	Car still having issues. p0300 p0173 Ok this is getting on my nerves to no end now. After spending alot of money and sending my car to FSr to get updated this is my current mods list.... 94 VR4 Engine refreshed, polished crank, 60k tunes up, all new parts, bolts so on and so forth. That has been upgraded 99 Lifters, and a few mods to make it work ok with a my 96 setup 15G turbos 450CC Injectors S-AFC-2 Tuned by FSR AEM Wideband That read 14.9 at idle Solid motor mounts, Southbend TZ Clutch Intake (Matrix) Samco Rad Hoses 96 VR4 ECU and Harness, un cut (SAFC is using one of those harness adpaters) Ok now Daily I get a friggin p0300. My plugs are brand new, my Spark plug cables are brand new MSD, My PTU and Coil pack are also brand new. New as in less than 4k miles. These issue occured before the engine swap and after. Any ideas? I've checked all the connections I can check but what would DAILY cause a p0300. Could I just have a bunk OBD-II ECU? I've never heard of these having issues. Please help me I'm seriously on the verge of selling this bitch to some other sucker to get rid of it. __________________ R.I.P. Beastly-SRT 2/21/08 9:04AM-2/21/08 2:27PM

05-13-2008, 10:12 AM	#2 (permalink)
tarfin Paid Member Join Date: Apr 2008 Location: Jackson, MI Drives: 92 Stealth TT Trader Rating: (0)	Re: Car still having issues. p0300 p0173 OBD-II Trouble Code: P0300 Random/Multiple Cylinder Misfire Detected

05-13-2008, 12:49 PM	#3 (permalink)
NeoValentine MI SCUZI! MI SCUZI! Join Date: Jul 2000 Location: San Jose Drives: Twin Turbo SL Trader Rating: (43)	Re: Car still having issues. p0300 p0173 I've replaced everyone of those, o2 sensor are new, Plugs new, wires new, everything, I'm seriously starting to wonder if it's the ECU.

05-13-2008, 12:54 PM	#5 (permalink)
NeoValentine MI SCUZI! MI SCUZI! Join Date: Jul 2000 Location: San Jose Drives: Twin Turbo SL Trader Rating: (43)	Re: Car still having issues. p0300 p0173 That's what I'm looking for now. If it is the ECU would changing the caps cure the issue possibly or would it be something else besides the caps.

05-13-2008, 01:41 PM	#6 (permalink)
Colt45_GTO GTONW is good to go Join Date: Nov 2004 Location: manchester uk Drives: Black '91 TT Trader Rating: (0)	Re: Car still having issues. p0300 p0173 i would inspect the board mate. mine was ok round the caps but looked charred elswhere

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05-13-2008, 01:43 PM	#7 (permalink)
NeoValentine MI SCUZI! MI SCUZI! Join Date: Jul 2000 Location: San Jose Drives: Twin Turbo SL Trader Rating: (43)	Re: Car still having issues. p0300 p0173 I'll take it out tonight and go over it.

05-13-2008, 03:32 PM	#8 (permalink)
2ndgen vr4 Join Date: Dec 2005 Location: california Drives: VR-4 Trader Rating: (0)	Re: Car still having issues. p0300 p0173 P0173 Looks like a leak after the mass air. un-metered air. __________________

05-13-2008, 03:38 PM	#9 (permalink)
TTstealthracing 3/S tech Join Date: Mar 2002 Location: severn,md Drives: cops crazy Trader Rating: (18)	Re: Car still having issues. p0300 p0173 [ p0173 [/quote] spray the intake manifold with carb cleaner where it mounts up to the lower intake and see if the idle changes __________________ 2 wheels spinning 4 wheels winning 1992 red RT (Original owner) 1994 RT TT (750 WHP) 1994 platinum RT TT (twin 20g coming soon) 1992 green VR4 (16g beast) 1998 GST eclipce (built & modded to hell) 1993 red SL bomex body kit 2001 BENZ E320 4 MATIC 2001 JAGUAR S-TYPE

05-13-2008, 04:05 PM	#10 (permalink)
NeoValentine MI SCUZI! MI SCUZI! Join Date: Jul 2000 Location: San Jose Drives: Twin Turbo SL Trader Rating: (43)	Re: Car still having issues. p0300 p0173 Ok I'll give that a shot.