link v5 wont fire

[uza63]

Ok so ive got a 1uz running a link v5.

its been tuned and wired correctly. was running great.

 

started a supercharger upgrade, switched fuel injectors from 215cc to 570cc

sparky plugs in a hand controller and "dials the injector cycle down to 1% at idle.

 

Ive switched it back to standard with 215cc installed again.I have also switched injector plugs .it has 12v either side of the injectors (link normal?)  now It wont run.it fires with either sprey.

Ive got spark, I presume its the fuel , getting none or very little.

 

I have the pc link programme, and can see the injector pulse widths, but theirs nothing to suggest what he played with,

or what im missing? this ran just a week ago, fouled up plugs and limped in but still ran.

 

can anyone work with this info and suggest what to adjust to get the correct tune back?

[Rookie]

sparky plugs in a hand controller and "dials the injector cycle down to 1% at idle.

 

This seems like a good place to start.

[eke_zetec_RWD]

Where are you based? Just fluffing with the idle won't do much.

12v both sides is normal if the injector is still plugged in or another injector on the same channel is still plugged in. A v5 only has 2 channels.

Put up a screen shot of your fuel base map.

[eke_zetec_RWD]

Also Has any welding been carried out on the motor or car with out the Ecu being compleaty unplugged? The V5 has a tendency to loose its memory and resort back to factory settings with a voltage spike. A screen shot will tell me yay or nah

[0R10N]

Put up a screen shot of your fuel base map.

 

This. You may also need to change your fuel master value.

[uza63]

how do I load a picture, I have a shot here.

no welding, the table hasn't changed sence running the last injectors

[0R10N]

Hit Alt+Printscreen with the PCLink window highlighted, then go to http://imgur.com, click upload images, then hit Ctrl+V.

 

If the table hasn't changed since the 570cc injectors were installed, and you've subsequently gone back to 215cc, then your fuel values will be way out.

[uza63]

the fuel values are the unchanged values from the originals.

look up imgur.com/DMcZwcA

for some reason I can even paste text onto this page.

 

basically the 570cc were never tuned in, so the only change is the dial back when it was idling because it was over fueling

[eke_zetec_RWD]

Basically you have a fuel table,

Then there is the master fuel number.

The master is the multiplier for the fuel table.

So if you double the injector size then a good place to start is halving the master fuel.

[eke_zetec_RWD]

Are you at the South pole? -4 water temp??

[downtrail]

There not low z injectors are they? As above revert back to how it was and trim entire tune via the master setting if you get it to crank and cough over a few times it needs more fuel if it does nothing take fuel out as you've probably flooded it. Whilst cranking it should be looking at a cranking enrichment table after is sees a rpm higher than cranking it'll pump in an after start enrichment for how ever long it's set to then it'll revert to the main fuel table so don't fart with that until all this happens in an orderly fashion or you'll just go around in circles

[Stu]

What resistance were the larger injectors when you had them fitted? Are you running ballast resistors? If not and your large injectors are low impedance you may have done awesome things to the injector drives if you tried to run it.  System voltage of 6.5v wont be helping.  Whats your master fuel set to?

[cute wee gem]

Sync errors?

[eke_zetec_RWD]

2 sync errors is fairly typical.

Deft check injector resistance with it unplugged. You want about 13 ohms

As said voltage is weirdly low. Normally Ecuador would shut down at this low voltage

[uza63]

cranks over with 6 sny errors.

master fuel set up is 100 atm

injectors went to low impedance with resistors fitted, now factory 1uz high impedance with now resistance fitted

[eke_zetec_RWD]

Change master fuel to about 40 and dry the spark plugs out and report back

[uza63]

new plugs fitted.

dialled master to 150

she runs

 

spoke to the original tuner, he said between 125-175 is where he would have had it.

how much would 1o increments be? just trying to work out what it would have been before the dial back

[downtrail]

Chuck a wide and into exhaust and change master until you get around 14.7 afr at idle and that'll be a good base to start from

[eke_zetec_RWD]

If she starts and runs then quickly get it to the dyno asap haha.

Where are you based?