c16xe into nova, wont fire, fuel?

[darcy]

hi iv just fitted a c16xe into my nova, the fuel pump relay is coming in, i have a spark, the engine just turns and turns without a hint of firing, plugs are dry so it looks like no fuel is entering the bores, i have fuel pressure to the rail so it loks like the injectors arent opening, it will fire up with easy start down the inlet so the ignition side appears to be ok, any ideas? ill wire in the diagnostics tomorrow and see if anything faults up, also do i need to do anything with the blue/red wire? i believe its for the speed sensor?

cheers

[Lee H]

Blue/red is for the speed sender, heard people having problems with car cutting out at junctions without it wired in but it wouldn't stop the car running.

Strange one, was thinking imobilised ECU but think only X16XE's had them.

[General Baxter]

gearbox earth lol ?

also are you sure its a c16 and not an x16 ?

[darcy]

its a c16, plastic inlet. the earth must be ok if its turning over/sparking surely? id imagine the coil pack would draw more power than injectors. iv not heard the engine running previously either

[General Baxter]

its a c16, plastic inlet. the earth must be ok if its turning over/sparking surely? id imagine the coil pack would draw more power than injectors. iv not heard the engine running previously either

stick a jump lead from the gearbox to the negative side on the battery

my x16 would run for 3 seconds on easy start then stop, then made and earth strap and it fired up first turn of the key lol

[darcy]

ill give it a whirl in the morning. i suppose if its a crap earth then the starter will draw most of the power, and not leave enough fro the ecu to do itd business. if it does fire up now, i doubt the neighbours will be happy with only a downpipe on lol

[General Baxter]

**** them, you got to 11 o clock to make as much noise as poss lol

[burgo]

you sure you have your fuel pipes the right way round?

[darcy]

pretty sure as the unions were disconnected from the let fuel rail and just screwed onto the c16xe. would think they would keep these the same?? ill double check though. also, am i right in thinking it cant be a sensor fault? as its sparking it must know when the engine is in a certain position?
or does the cam sensor do the ignition and crank sensor do injector pulse or vice versa?

[General Baxter]

the crank sensor does everything on it lol

[darcy]

**** them, you got to 11 o clock to make as much noise as poss lol

haha. im trying to keep them as sweet as i can, you can see them shaking their heads everytime i turn up with a new addition to my vauxhall/opel scrapheap in my back garden lol

[darcy]

the crank sensor does everything on it lol

so my thinking that if its sparking, it should be telling the injectors to fire too?

[General Baxter]

all depends on if its earthed prop, have you connected the 1 billion earths ? lol

[darcy]

the engine loom ones? iv not touchd the engine loom connections to the inlet etc, as for earthing the block etc, i only have one from battery terminal to the started casing. ill try some aditional earths tomorrow and keep my fingers crossed. im just picking peoples brains now as i wont be on the net tomorrow

[darcy]

i remember havin stupid probs on an old nova gsi of mine once, that was filling the bores full of fuel, that was down to a dodgy earth in the end

[General Baxter]

as said,

i fitted a x16, me and burgo spent about 5 hours trying to get it to run, burgo went home, i went to bed, woke up in the morn, attached the orginal gearbox earth strap, fired stright up lol

[darcy]

well ill keep my fingers crossed its that. i hate fitting engines that i havent heard running first

thanks for the info, ill let u know how i get on

[darcy]

well the crossed fingers didnt work, i earthrd the box and inlet to the battery and no joy, even ground the ecu case too, one strange thing though, i cant get the engine management light to come on, the bulb is ok, fed the brown/bule to it, wont light when i first put ignition or when i short the brown/white-brown/yellow to read the fault codes, could the ecu be fubarred??

[General Baxter]

does it have a air flow meter?

[darcy]

yeah

[Adam]

If the ecu light isn't coming on with ignition then the ecu isn't powering up, thats why it wont run.

Check the 12V and Ign feeds to it

[burgo]

but his fuel pump is kicking in and hes got a spark so it must be powering up ad

[Adam]

Sorry i never read the start of the thread lol

As someone said previously, the fuel pipes are on the right way round aren't they? Feed to the rail, Return from the regulator?

Fuel pump is running of the relay yeah and your not manually powering it?

[darcy]

thats what i cant work out? its like the fuel sontrol side it dead but th igniton is ok, the fuel pump is on a switched live as it was wired on my let, but the fuel pump relay is energising, afer i finish cranking, the relay clicks off a second or so after

[darcy]

yeah double checked the fuel pipes this morning, top union (19mm nut) feed, 17mm nut off back of reg is return

[burgo]

have you loosened the feed to make sure your getting fuel to the rail?

[darcy]

didnt have to, the union was leaking so theres definately pressure there. can injectors stop working if its been stood for a while? seems odd that all 4 would though as not even 1 cylinder is trying to fire, just turns and turns

[burgo]

have you tested for a permenant live at the injectors whilst the ignition is on?

[darcy]

no not yet, someone on vauxsport suggested that, problem is the cars at mine and i have to come to the olds to get on the net as i cant always hack into next doors wireless connection lol. so if i havent got live to the harness feeding the injectors what could be causing thet? it seems to me like i have an ecu fault, could i link a 12v to the harness just to try it or do u think that will fry things? lol

[Adam]

Get the pump running off the relay as it should do.
The relay also powers the fuel injectors, which could explain things.

So see if the pump will run off the relay

[darcy]

cool ill go try it after, think ill lend my mates ecu too on the way home. could be somethin daft like if it doesnt sense the pump drawing a current through the relay itwont open the injectors? ill give it a whirl... cheers for the info guys, much apprecieated

[Adam]

Also, check that the earths are on the tb, and end of the inlet, and by the alternator, theres about 5.

[burgo]

if youve got a mutlimeter and you have got live at the injectors. check the other one for an earth pulse whilst cranking using the continuety (sp) setting

[Adam]

You will only have a live at the injectors when cranking btw, so yep its worth trying

[darcy]

well boys im up **** creek. iv tried a new ecu and still no go. im not getting a live to the injectors, whats causing this? really pissing me off now. im off to town to get ruined and pull an old bird lol

[darcy]

its alive!!! not sure exactly what was up. tried a spare ecu, crank and cam sensor, still no joy. checked fuel pressure again, didnt seem to have as much pressure as before so i tried another pump, hey presto, first turn of the key. think the pump was on its last legs and must of finally let go today, im gonna try the old bits one by one tomorrow to find out which part im gonna swear at and jump up and down on, thinking crank sensor as i disconnected the cam sensor and it carried on running so it doesnt look like it needs the cam sensor for it to run

[burgo]

niceone. glad you go it going