[All Models] C20XE will not start, tried everything, Help asap

[ryanh92]

I have converted my corsa to a late coil pack c20xe and i cannot get it to start. it ran before but the alternator was faulty so i changed it and as i pulled it off the live from the alt the battery terminal touched by accident and the live sparked off the alternator, I have changed the crankshaft sensor, cam sensor, ignition module, coil pack everything other than the ecu? it started before with faulty wiring to the air flow sensor which i sorted out but still i cannot get it going, no engine warning lights are coming up and i have done the paper clip test aswell, ADVICE please :/

[ryanh92]

C20xe not starting, still

Pressure test done, 16 bar on all 4 nice and even. Great spark coming from all four plugs which i removed and tested. so cant be coilpack or ignition amp. Will the throttle position sensor cause a bad misfire and stop it from running? i have revved it which keeps it alive only just but its definitely misfiring. No fault codes still. ECU is making a hum so thats all got power still fuel pump reply working aswell a loud click when on and off. The air flow meter wiring connection checked again against what i was told the wires went like on this thread aswell as the CTS wiring

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I really dont no, and its bugging me now as i need the car for work tomorrow! :/

[ryanh92]

Here is a video may help my question, The smoke coming from the engine is abit of oil on the manifold that was spilt. Misfiring can be herd and unless i rev the car it will not stay alive the first two time are without any revving, the thirds i rev the car. sorry for poor quality

Whats the problem, to cause this to misfire - YouTube

[Dave]

The ECU should definitely not be humming :O

[Rob]

sounds like youve spiked the ecu.

[ryanh92]

Really? Yeah it's a very slight hum and the warning lights not on but when i do the paper clips test it comes up with the standard 31 code but nothing else, is there anyway I can no for sure without taking it to someone to test?

[Dave]

Not really, no, swap it with another one and see. I wouldn't bother taking it anywheres there's not really anything to test inside them, just a circuit board. If you've cooked it then it'll just be a chip on one of the board that's died, not replaceable. I'd try a known good ecu first.

[ryanh92]

Ok mate brilliant I'll give it a go and let you no how it gets on got one from eBay coming hopefully tomz im gonna buy unless you have a good one for sale you can next next day?

[Dave]

Nope sorry, I don't. Sold all my XE stuff a few weeks back. Good luck.

Also, please avoid text talk. Thanks.

[ryanh92]

Sorry about the text talk, but update. Fuel relay changed and ECU and guess what, no difference!, the only two sensors i have not changed are the ICV and the TPS but they worked fine before the problem started. Its misfiring on multiple cylinders everytime i try to start if i put my foot flat on the floor it keeps it going but very low revs and rumbly feeling in the car due to it misfiring. Again no fault codes are coming up. What can it be? compressions good, new piston rings bearings its a complete recon which i did myself over the past year by the book. but as i said before the accidental short out it ran with two fault codes the maf and cts which i sorted

[ryanh92]

anyone any ideas?

[Taurus]

First idea is to stop asking members to reply ASAP. People will reply when they can. The fact you are in a hurry isn't a good reason to demand an answer ASAP. If you want ASAP take it to a professional and pay the man his money.

Secondly - whilst diagnosing via video clips is hit and miss that sounds to me like a fuel issue. If fuel is being delivered and not being properly burnt your plugs will be wet with unburnt fuel, and you'll smell fuel in the exhaust. I'd check you've got good pressure at the rail and make sure it's being delivered into the cylinders. You need to check the basics systematically.

(I'd have also suggested a spiked ECU, but if you've changed it for a known good one then presumably you can rule that out. Stable door and horses - but I always tie the battery terminals well out of harms way whenever I have them off for any reason. The thickness of the cables always pushes the clamp back towards the terminal and accidental contact happens all the time.)

[zuluman]

You said you are getting 16 bar in fuel pressure - correct? Is that correct for this engine?

Could the injectors be dirty?

I wonder if the coils in the injectors are shot - or partially shot?

Can you get a reading with the ohmmeter?

Are they receiving signal - or at the right time??

You did not do anything to adjust the timing did you???

[Dave]

You said you are getting 16 bar in fuel pressure - correct? Is that correct for this engine?

Could the injectors be dirty?

I wonder if the coils in the injectors are shot - or partially shot?

Can you get a reading with the ohmmeter?

Are they receiving signal - or at the right time??

You did not do anything to adjust the timing did you???

16bar is his compression test results for each cylinder, roughly 230psi. If that was his fuel pressure I'd be evacuating neighbouring roads :/

[Vegas]

Are you sure injector rail is fully clipped down?

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16bar of fuel. **** me, what is it running? 3000hp?