Still not starting

[PaRaDoX]

Hey guys, first up, no stupidity im looking for help here im stumped!

it runs on creamtops and stock tune with 1 bar! dangerous after boost

ok so so histroy on the car

its got a

t04E turbo
570cc injectors (55lb/h)
2 bar map sensor
walbro 255LPH fuel pump (500-600hp)
a 1 year old ecu
1 year old tripple coil pack
1 month old leads
5 month old plugs
1 year old CAS

now ok, last time i had this car running was last week, just installed 570cc injectors and it started up fine on my 2 bar tune, coulda run better but it was running... now i had LITTLE fuel left, ran it dry on the way to the fuel station

went and got new petrol, filled her up and she cranked but wouldnt start,
over the next 2 weeks i replaced fuel pump thinking i fried it and i wanted to upgrade it anyway, it started after installing pump, not running well

then next day same tune wouldnt start???

anyway cars sitting in my driveway with creamtop injectors back in, 1 bar map sensor (they run off a stock tune) and it still dosnt start..... this indicates to me its not tune related...

heres my list of things i thought it might be

ECU
FUEL FILTER
OIL FILTER
TUNE
CRAP FUEL
INJECTORS
REGULATOR
FUEL REG
NO SPARK?
COIL PACK GROUNDING

so far, ive tested
ECU > NOT ECU (tested a spare one)
TUNE > NOT TUNE
INJECTORS > NOT INJECTORS
COIL PACK GROUNDING (despite my coils are mounted on my thermo fan, i have 3 grounds on them, 2 to the chassis and 1 directly to the neg battery terminal)

no engine lights appear

so what does it do?
when you crank it fires maybe 1 out of 6, and its enough for it to help the crank through till the next one.... ive had it started on 1 or 2 before, could barely hear the car was started (2 bar with bigger injectors)

ive checked leads for fouling ( a big issue with the heat being pumped out by the turbo ) found nothing

money is not a issue, i could give RACV road side assistance a call, if all else fails, helps to have another mechanic to look at it, he'll probbly look at me and laugh "lol turbo"

if i can fix this issue the car should be up and running for good

[88GreenVN]

Maybe check the CAS - 1 year old can mean dead CAS. Are the injectors getting power? You did say almost starting. so is it pumping out fuel at the rails?

[PaRaDoX]

pumping LOTS OF FUEL out the fuel rails, not %100 sure if injectors are making mist.... tommorrow ill unbolt the fuel rail and crank it to see if we can make a mist of petrol...

i havnt got a fuel pressure gauge onto the line yet, but from squeazing it it feels like it has LOTS OF PRESSURE like round 40psi, feels as tough as a tyre

CAS would stop it from cranking all together, it still cranks and tries to ignite
i can smell petrol, after cranking, (probbly from the zorst leak) soo i know shes pumpin the juice.....


some aditional info, i did get it started after running outta fuel, ran ok..... i got it started my removing memcal and cranking it till it fired 2-3 and died, then reinserted memcal and started i drove it a bit... felt MASSIVELY underpowered especially under boost i turned around and took her home instantly

any other idea's?

[88GreenVN]

When you say core pack are you including the DFI unit?

[PaRaDoX]

i upgraded it to a VN s2 tripple coil system (can replace coils individually, brought it brand spankin new)

[88GreenVN]

HMMM got fuel, got compression - so its gota be electrical. I'd go over the the connectivity of the injectors and DFI. You dont have a calais security thingo do you?

[PaRaDoX]

my calais alarm is disabled, and if it was on it wouldnt crank, injectors are connected properly,

compression isnt a definate but i replaced headgaskets 2 weeks ago with ACL race series headgaskets... i can do a compression test if need be... but i dont think thats it

injector connectors are fine... ill rip fuel rail out tommorrow

greenfoam said to test sparks which ill do in a second (see if it arcs)

[Boonz]

may sound dumb but did you hook up the pressure line or the return line to the regulator ? or does it only go on one way

[88GreenVN]

Thats next slip a plug into one of the leads and see if you have good spark.

[pow3rslave]

if you ran it fully dry, could it have sucked up all the stank crud at the bottom of your tank? could have blocked lines or injectors.

[VN_Luke]

spark plugs = fowled from running massively rich...

remove spark plugs.... clean with wire brush (or just buy new ones)... re-insert plugs, start car.

[PaRaDoX]

i will try that luke!

also got a compression test happening tommorrow to rule it out

shes sparking from the leads into a plug

thats a negative on blocked plugs,
maybe blocked fuel pressure but at bare least it should start up, next stop check plugs and for the funny tasting mist (fire injectors into air)

[88GreenVN]

[QUOTE=PaRaDoX616;565775]

shes sparking from the leads into a plug[QUOTE]

Thats a good sign at least - but dont fix your problem

Back to the start - What did you do before the no start, was it changing the injectors?

ha just read the first post and she ran out of fuel.

When you replaced the fuel pump did you get all the wires connectd OK have you checked your work in that area?

[vt1538]

So are you running the stock tune with the original 1 bar sensor or the modified tune ?

[PaRaDoX]

im sure i wired it correctly, shes pumping fuel....

as she sits on the street it has

creamtop injectors (close to stock, will run on a standard APNX tune fine)
1 bar map sensor
stock tune..

no reason it shouldnt start (it usually works on this config)

compression test + pug/lead test will happen when i get some more spare time off work + study (exams this week, havnt had the most spare time)

[PaRaDoX]

i just had a crazy thought, back when i blew the headgaskets i broke the detonation sensor wire and plastic clip, now i soldiered it back together but what if i stuffed it????

ill grab one from the wreckers and test it out.... could be a theory!

[Not_An_Abba_Fan]

So it hasn't been running right since you did the head gaskets?

[vt1538]

Do you know anyone with some noid lights or an LED test light to plug into the injector harness? Just to make sure there is a regular signal. Also check all your fuses & relays.

[vt1538]

Knock sensor disconnected will still run it will only throw a code.

[PaRaDoX]

noooooo, what im getting at is,

its connected (wired) howevere detecting false detonation and retarding the engine not allowing it to start.... thats my theory,

therefore also not giving a engine light

its been running since i changed the headgaskets but it would explain the on/off working

[vt1538]

The computer is not doing anything to the spark until certain criteria are met. That will not be the issue.

[PaRaDoX]

ok well, im not going to get time to test it untill this atleast friday sooo ill get back to you

[Furious_8]

spark plugs = fowled from running massively rich...

remove spark plugs.... clean with wire brush (or just buy new ones)... re-insert plugs, start car.

It has to be this i went through 12 set of plugs when i first got my turbo VC running with the micro tech every time i went to put it on the dyno i found something wrong or something i was not happy with and just from moving it in and out of the work shop is would just stall and never start again unless i put new plugs in.

[PaRaDoX]

bout due for a plug change anyway should i stay 1.5mm gap or go to 1.0mm? or other

i just noticed a error in my previous post "thats a negative on blocked plugs," i ment blocked injectors
havnt even looked at plugs YET, i will when i get spare time

[cracker]

buy super v6 plugs they are factory gapped down