EcoTecDriver

I recently supercharged my 2007 2.2l l61 G5

Tuning is Trifecta
Map is ZZP'z 2 bar re-wired for a 2.2L(Its sold for the 2.4 on there site, just 2 wires needed to be re pinned)
Throttle body Is a used LSJ's
Injectors are used stage 2 42lb'ers


The problem.

On the 1st drive the car drove fine, maybe 30mins in the engine cut off, that car held power just engine off, but I was able to crank and restart.

then another my guess 30mins in the car died again, this time I could not restart it and ended up pushing it 3miles home, with the help of 2 friends.


I can get the car to start BUT I cant get consistent starts, I can turn it off, then on and after a couple of times it just cranks

The mechanical Vacuum gauge is reading 20, so there are no leaks

The battery has a full 12volts

and my air to fuel is a 14.8

My last idea is to replace the throttle body, thinking maybe its defective?

any thoughts!?!?! Im running out of ideas

heres a vid

09whteSSpssssh

What are youre plugs gapped at? Hesitation you said right? Sure its not a maf issue?

ItalianJoe1

iTrader: (10)

Fuel system in good shape?

Clogged fuel filter could be overworking the pump, once it overheats it won't come back on? Just a thought.

EcoTecDriver

I dont know the car ran like new before the install, it only has 27k on the speedo.

At 1st I thought it was the maf, My maf harness has 2 same color wires for the ia1 and low refence,and I needed to pull both out to wire the lsj 2.5bar sensor, but abandoned the idea, and went with the zzp plug and play 2 bar, I had no way of identifying the wires since both were tan, but I hooked the car up to a data scanner that can read sensor data, and i was able to rule out a mis wired maf, it read 98* then I switched the wires to see if it was wrong and then it read 300*+ So I know it was wired correct from the start.


I replaced the plugs with autolite xp iriduim and did not gap them since they looked damn close to the stock gap
I just dont see what could of clogged the filter if the car ran fine before the install, thou Im not ruling that out as a option, is it possible the stp octane boost clogged the filter?(I added a bottle since I had a tank of 87 still in there)

BlackARCA06

iTrader: (5)

Why does your L61 look different then mine? Is it because of the different injectors? sorry for off topic im just curious.

EcoTecDriver

Your a 06, GM made changes to the motor in o7 and then once more in o8 adding vvt.

09whteSSpssssh

stock gap! Have you asked any of the charged guys what gap there running? That could be an issue, but i dont know. Not wanting to turn over after sure sounds like a MAF issue to me. Something with that maf is just not right, have you considered replacing the MAF?

You also said in another thread your TB was used right? I would just find a willing member to let you use one off there car, before you bother replacing it anyway.

BlackARCA06

iTrader: (5)

Oh ok.

good luck and hope you get this figured out.

EcoTecDriver

If I can validate the maf is busted hell yea I would replace it, but wouldnt there be a code thrown?

and yes we should run our stock gap at .35 I was able to confirm this

09whteSSpssssh

Yeah you would hope itd throw a code but hey stranger things have happened, I would borrow a maf and throttle body from someone to test, then youll know whether you need to spend money on a new one, or youll know its something with the setup of the (wiring,loose connection, etc.)

EcoTecDriver

Yea that is an option, theres no use in spending money replacing non-damaged parts

scottie

"I replaced the plugs with autolite xp iriduim and did not gap them since they looked damn close to the stock gap"

You haven't thought about actually checking them?

09whteSSpssssh

And also if you know they come out of a car thats running fine that can also point you in the direction of whether its a part problem or the setup. Kill two birds with one stone. I had a mystery injector issue that gave me hell for two months so i feel your pain.

EcoTecDriver

No since I already had gapped plugs in, but I can double check them, I just dont think thats it.

I tested the injectors off the car and just jumped them with 12v, the solenoid is functioning so I canceled that out?

And the nice catch is I have only 17 days to find the problem, I need the car reliable for when I return to school for the fall semester!!!

09whteSSpssssh

Have you checked your battery cables are tight? Have you checked your grounds? This could deffinitley be an issue, make sure your fuses are all tight and that the screws that hold in the fuse blocks arent too tight or they can cause a short, could deffinitley be an intermittent electrical problem.

Yeah thats a bummer, My injector would work sometimes and not others, but it never caused a starting issue that i remember.

EcoTecDriver

I checked the fuses, Grounds are in check that I know of.

I even went out right now and disconnected the battery and waited 10 mins and

start 1 ok

start 2 ok

Start 3 nothing

IS it possible that the injectors are messed up/glitching and flooding the car with gas?

Chevycobaltss3

iTrader: (2)

First off car is tuned for the injectors are you sure they are 42z make sure your Maf sensor is put in the intake pipe correctly. Take a plug out after a no start and see if there is raw fuel on the spark plug. What was ure wot afr. How much r u boosting. Make sure your computer is correctly connected to harness I've seen this before... And one last thing if you check eery thing and you can't find a issue. Unplug ure maf sensor. They might be using only maf but if not tour car will go into the ve table . Hope this helps.

EcoTecDriver

Yes it is tuned for the injectors, The maf only fits one way, I already thought about that one
Im boosting 10 psi, I was running a little rich on the base tune @ wot, but Vince corrected this, and the new tune goes on tomorrow.

Explain the MAf unplugging part again?

Chevycobaltss3

iTrader: (2)

If Vince did not tune u directly maf which means ur ve table(volumetric efficiency) it tells the computer grams of air per cylinder in case of a maf failure. So if u r tuned ve and maf u could unplug ure maf and see what happens. I hope u under stand.... If it cuts out around 30 mins check ure fuel pressure make sure it is constant.

JapEatr

iTrader: (9)

guys spark plug gap will not cause and engine not to start, or shut off while driving

EcoTecDriver

I know, I just figured I would answer them.

The car can drive, I haven't taken it any further then a loop around the block.

Tow hook and new tune gets installed tomorrow, and I found a local texas member who may have had the same issue, Im giving him a call tomorrow.

Omega1x

If the filter was starting to become clogged when it was stock, the fuel demand was lower at that time, due to the smaller injectors. Once you put in the larger injectors, the fuel demand increases, thus possibly creating problems. Just a guess, but it's worth replacing anyway. GM recommends it gets replaced at 30K anyways.

EcoTecDriver

This what we are trying today.

If it was the TB I would be getting codes, So the hardware may not be the issue, We are looking at tuning now.

Vince said its not the 2 bar, He suspects a tuning issue with the MAF, SO he tweaked the tune, We will try this 1st.

He also wrote me a tune using the 1 bar, so that will be take 2.

TRANSAM197781

iTrader: (5)

Is that the factory pcm retuned or aftermarket?

EcoTecDriver

its factory, tuned by trifecta