Holy crapballs, am I screwed? Need opinions.

ezpotato · 07-02-2009, 06:39 AM

Hey all,
So a few weeks ago, my car stopped working on all it's cylinders , here's the thread for it

http://my350z.com/forum/engine-and-d...ow-a-code.html

Cliffnotes:
Parked car, it drove normal. started it next day, was not running on all cylinders. Switched out spark plugs, no effect. Messed around with injectors, 2 of the cylinders werent getting power.

Took it to triwerks (awesome guy Alex) and they did a 3 day check of eveyrthing, i mean voltage, injectors, ecu, etc. So it's come down to the fact that my fuel pressure stays at almost 5 bars on my gauge, so is it most likely a tune issue? Could it be that something went wrong and my cars timing got all retarded and it's running like that?

I'm waiting to take it back to the peeps who tuned my car, but i just need something to go on! i know this is a long shot, but i mean does this sound like something that COULD happen? cause at this point i'm helpless.

djamps · 07-02-2009, 07:11 AM

Didn't you try pluggin in your stock ECU alone and still had the problem? If so, def. not a tune issue, more likely wiring problems.

rocks · 07-02-2009, 08:13 AM

What do you mean 2 of the cylinders were not getting power? As in the coils or the injectors not firing? To properly check this the intake manifold needs to be removed. Did they remove the intake manifold and injector rail and crank the car? Did they also crank the car with the coil packs out to check for spark? I recently had a injector driver fail on my ecu. A few days ago a coil pack burned out. It will make your car run like poo.

ezpotato · 07-02-2009, 08:17 AM

yeah i did plug my ecu back in.. didnt change the problem. is it possible that something went wrong with the tune and retarded my timing? maybe why my car is running like crap?

rocks · 07-02-2009, 08:34 AM

Did you not read my post. I read the thread you linked. You have 1. Bad coils 2. Injectors stuck open or not firing 3. Bad ecu. It is one or all of those 3.

ezpotato · 07-02-2009, 08:38 AM

yes i will ask em if they did that.

Sharif@Forged · 07-02-2009, 08:40 AM

Someone needs to do a thorough step by step diag and determine the cause. Should take a shop less than 2 hrs to figure this one out.

rocks · 07-02-2009, 08:52 AM

It took me about 2 hours to figure out I had a bad ecu. That was with using a multimeter on the ecu and running a new injector wire to be sure. I also had 3 bad coil packs at the same time so that didn't help.

ezpotato · 07-02-2009, 09:25 AM

yuppers. going to jotech today... gotta drop the cash to figure this out! after this, bye bye FI...

rocks · 07-02-2009, 09:53 AM

You could check this yourself with a small cheap socket set and a test light. Would save you alot of cash...

imonlykidden · 07-03-2009, 05:44 AM

Time for a built engine.

JasonZ-YA · 07-03-2009, 06:10 AM

Any word?

Chef-J · 07-03-2009, 08:22 AM

Jotech?

What I know is tune will not change if you didn't touch anything. Correct me if I'm wrong.

Sorry to hear, you haven't figure it out.

07-02-2009, 06:39 AM	#1
ezpotato Registered User Join Date: Aug 2008 Location: Addison, TX Posts: 163 iTrader: (2)	Holy crapballs, am I screwed? Need opinions. Hey all, So a few weeks ago, my car stopped working on all it's cylinders , here's the thread for it http://my350z.com/forum/engine-and-d...ow-a-code.html Cliffnotes: Parked car, it drove normal. started it next day, was not running on all cylinders. Switched out spark plugs, no effect. Messed around with injectors, 2 of the cylinders werent getting power. Took it to triwerks (awesome guy Alex) and they did a 3 day check of eveyrthing, i mean voltage, injectors, ecu, etc. So it's come down to the fact that my fuel pressure stays at almost 5 bars on my gauge, so is it most likely a tune issue? Could it be that something went wrong and my cars timing got all retarded and it's running like that? I'm waiting to take it back to the peeps who tuned my car, but i just need something to go on! i know this is a long shot, but i mean does this sound like something that COULD happen? cause at this point i'm helpless. __________________ When i push the pedal, it goes WOOOOSH and i move forward pretty quickly

07-02-2009, 07:11 AM	#2
djamps Registered User Join Date: Dec 2008 Location: MD Posts: 458 iTrader: (0)	Didn't you try pluggin in your stock ECU alone and still had the problem? If so, def. not a tune issue, more likely wiring problems. __________________ '04 DG 6MT / Original Owner / AAM Stg1 TT

07-02-2009, 08:13 AM	#3
rocks Registered User Join Date: Jul 2006 Location: hobbs nm Posts: 1,320 iTrader: (1)	What do you mean 2 of the cylinders were not getting power? As in the coils or the injectors not firing? To properly check this the intake manifold needs to be removed. Did they remove the intake manifold and injector rail and crank the car? Did they also crank the car with the coil packs out to check for spark? I recently had a injector driver fail on my ecu. A few days ago a coil pack burned out. It will make your car run like poo. __________________ 9:1 forged engine with jwt s7 cams - Built Engine by builtzmotors. Tuned by UpRev by me .

07-02-2009, 08:17 AM	#4
ezpotato Registered User Join Date: Aug 2008 Location: Addison, TX Posts: 163 iTrader: (2)	yeah i did plug my ecu back in.. didnt change the problem. is it possible that something went wrong with the tune and retarded my timing? maybe why my car is running like crap? __________________ When i push the pedal, it goes WOOOOSH and i move forward pretty quickly

07-02-2009, 08:34 AM	#5
rocks Registered User Join Date: Jul 2006 Location: hobbs nm Posts: 1,320 iTrader: (1)	Did you not read my post. I read the thread you linked. You have 1. Bad coils 2. Injectors stuck open or not firing 3. Bad ecu. It is one or all of those 3. __________________ 9:1 forged engine with jwt s7 cams - Built Engine by builtzmotors. Tuned by UpRev by me . Last edited by rocks; 07-02-2009 at 08:38 AM.

07-02-2009, 08:38 AM	#6
ezpotato Registered User Join Date: Aug 2008 Location: Addison, TX Posts: 163 iTrader: (2)	yes i will ask em if they did that. __________________ When i push the pedal, it goes WOOOOSH and i move forward pretty quickly

07-02-2009, 08:40 AM	#7
Sharif@Forged Sponsor Forged Performance Join Date: Dec 2003 Location: Marietta, GA Posts: 13,510 iTrader: (91)	Someone needs to do a thorough step by step diag and determine the cause. Should take a shop less than 2 hrs to figure this one out. __________________ Redline Time Attack Class Winner!!! HKS Pro Dealer (Largest Volk Dealer in the Country), Certified: Fcon, Haltech, MoTec, AEM\| www.forgedperformance.com \| Sharif@ForgedPerformance.com

07-02-2009, 08:52 AM	#8
rocks Registered User Join Date: Jul 2006 Location: hobbs nm Posts: 1,320 iTrader: (1)	It took me about 2 hours to figure out I had a bad ecu. That was with using a multimeter on the ecu and running a new injector wire to be sure. I also had 3 bad coil packs at the same time so that didn't help. __________________ 9:1 forged engine with jwt s7 cams - Built Engine by builtzmotors. Tuned by UpRev by me .

07-02-2009, 09:25 AM	#9
ezpotato Registered User Join Date: Aug 2008 Location: Addison, TX Posts: 163 iTrader: (2)	yuppers. going to jotech today... gotta drop the cash to figure this out! after this, bye bye FI... __________________ When i push the pedal, it goes WOOOOSH and i move forward pretty quickly

07-02-2009, 09:53 AM	#10
rocks Registered User Join Date: Jul 2006 Location: hobbs nm Posts: 1,320 iTrader: (1)	You could check this yourself with a small cheap socket set and a test light. Would save you alot of cash... __________________ 9:1 forged engine with jwt s7 cams - Built Engine by builtzmotors. Tuned by UpRev by me .

07-03-2009, 05:44 AM	#11
imonlykidden Registered User Join Date: Apr 2006 Location: My own world! Posts: 7,701 iTrader: (10)	Time for a built engine. __________________ Almost everything I say, is about a 1/4 of the way thought through.

07-03-2009, 06:10 AM	#12
JasonZ-YA Moderator DIY, Tech, Motorsports & Marketplace 2004 Nissan 350Z Join Date: Jan 2006 Location: San Antonio/DFW, TX Posts: 6,391 iTrader: (45)	Any word? __________________ 04 PPW Touring - My favorite mod is my short Dodge Avenger antenna

07-03-2009, 08:22 AM	#13
Chef-J Believe or Not Join Date: Mar 2007 Location: Dallas/NewYork/Michigan/Korea Posts: 5,178 iTrader: (57)	Jotech? What I know is tune will not change if you didn't touch anything. Correct me if I'm wrong. Sorry to hear, you haven't figure it out. __________________ SC:426/360 SOLD...Chefj's Fav my350z sponsors: www.z1auto.com - www.Injectedperformance.com - www.uprev.com - Overdrive/jtran

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