g35 no spark

Got questions about your Infiniti? We're here to help, and it's FREE!
fixer
Posts: 99
Joined: Thu Jun 05, 2008 11:59 am
Car: 08 Sentra

Post

all the infinitis that i have worked on in the past - the immobilizer does not affect ign spark or timing, it will shut off the fuel pump relay only. so it cannot be a key or key program issue


fixer
Posts: 99
Joined: Thu Jun 05, 2008 11:59 am
Car: 08 Sentra

Post

heres a shot in the dark, ck continuity of the wires to coil with coils plugged in . measure at ecm. sometimes connector at coils could have bad continuity at the pins for the coil. if you measure from ecm it will eliminate the wire too.

Motohead1
Posts: 31
Joined: Mon Mar 23, 2009 9:18 am

Post

Thank God its FIXED!!!!!

In short yes the ecu will kill spark if the cam phase signal is off from the crank signal at all or atleast less than 100ms.

The stock flywheel was off one bolt hole. The previous owner must have had a decent clutch in there and threw a stock flywheel/clutch (brand new by the way not even broke-in) before the repo man showed up.

I will take a pic of the phase angle on the scope and how close it was tomorrow.

Thanks Steve and everyone for all the help. I should be driving this sucker around tomorrow.

uprev
Posts: 60
Joined: Mon Apr 13, 2009 2:29 pm
Location: Austin TX
Contact:

Post

Good read. Just goes to show you can rack your head against a brick wall and get no where on a trouble car. If you keep trying though you'll find it.

It also shows how useless d-bags are when they buy all sorts of fancy stuff for their car and can't even afford the car payment itself. Ugh.

User avatar
SteveTheTech
Posts: 3751
Joined: Sat Aug 16, 2008 3:20 pm
Car: 15 Nissan Sentra SR
12 Infiniti G37x Coupe
-Formerly-
05 Mazda 6 L3 Sport
95 Infiniti J30
94 Nissan D22
Location: Chantilly, Va

Post

Motohead1 wrote:Thank God its FIXED!!!!!


Awesome, so what brought you to this conclusion?

I would not have thought of that on a repo. I have had my arse kicked the first time I pulled a signal plate on an early model Murano and didn't index it. It makes sense given the detection logic required to start needs to see the cam and crank angles in correct timing. Sometimes (if it's more than 1 hole off) it may throw a CKP sensor dtc.

Damn Moto- I've been following this one for a while. Good luck with you G you've earned some time driving it now that you have taken the whole thing apart. Keep in touch if you've got any other concerns or questions.
uprev wrote:Good read. Just goes to show you can rack your head against a brick wall and get no where on a trouble car. If you keep trying though you'll find it.

It also shows how useless d-bags are when they buy all sorts of fancy stuff for their car and can't even afford the car payment itself. Ugh.
I love the people with more money than common sense or lack the ability to complete something correctly. I'm sure you see this depending on how much customer complaints you deal with. Great website cool products I have so many questions

Motohead1
Posts: 31
Joined: Mon Mar 23, 2009 9:18 am

Post

SteveTheTech wrote:

Awesome, so what brought you to this conclusion?

I would not have thought of that on a repo. I have had my arse kicked the first time I pulled a signal plate on an early model Murano and didn't index it. It makes sense given the detection logic required to start needs to see the cam and crank angles in correct timing. Sometimes (if it's more than 1 hole off) it may throw a CKP sensor dtc.

Damn Moto- I've been following this one for a while. Good luck with you G you've earned some time driving it now that you have taken the whole thing apart. Keep in touch if you've got any other concerns or questions.
Well After going over everything 4 or 5 times I thought I had to be missing somthing simple. So I got on the phone and started calling a fe z car specific shops to just get a few new Ideas. I got ahold of Jeremy at Altered Atmosphere and he was nice enough to spend a good solid 15min on the phone with me even though I havent bought anything from them. I will now though. He breifly mensioned how new guys in the shop would try to impress by doing a clutch job in under 3 hours but were baffled when the car wouldent start. The flywheel offby one bolt hole evertime was the cause.

So I got my scope back out and looked at pin 13,14,33. Crank, cam phase 1 and 2. And it looked close but the phase angles in the second and third row never lined up perfect in the crank gap in the top row. Thats all it took to kill spark. So I had the trans down in about 20 min. Confirmed off by one hole.

Here is a shot of the scope.<table style="width:auto;"><tr><td></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From G35</td></tr></table>


Return to “Infiniti Online Mechanic”