Suspect fueling problems

[jasononline]

Hello this is my first post
I have just fitted a 2.0 XE into my Nova. I got it running last night, but it sounded like it was only running on three. I switched the engine off to check all the earths etc, but did not disconnect anything. When I tried the engine again it splutter a few times, then it would not fire up. I tried it again after 1/2 hour and it started but died after 30 seconds or so. I tried disconnecting the fuel pump electric, turned the engine over and after a few turns it started and it run for 3 or 4 seconds. When I connected the electric to the fuel pump again it seemed to flood again. Anyone got any ideas what might be wrong with it, I only want to get it running enough to get it to a rolling road place.

Cheers

Jason

[justnovas]

What nova is it? Are you running a 3bar fuel system?
Can phone for help Just novas 01159 461105
paul

[jasononline]

It is a Nova GSI, the later type with distributor less ignition. The engine was straight out of a 1988 Astra GTE. The fueling is standard

Cheers

jason

[justnovas]

did you do the wiring?

[Aragorn]

a few possibilities

1. youve used the "ignition live" at the coil to power the ECU (this wire has a resistor inline on carb models so the voltage will drop down very low once its loaded up)

2. you dont have the correct fuel pump (ie your trying to use a 1.2i pump although ive heard the 1.2i pump does work)

3. Dodgy Fuel pump relay (this also powers the ecu itself so if its half dead it could cause problems)

[jasononline]

Yeah.
I ended up using a Cavalier GSI wiring loom and ecu, as the astra ecu was u/s.

[jasononline]

I am using the switch live from the coil pack. But it does show 12V's when cranking

[Aragorn]

was it a carb shell?

i'd seriously advise against using a feed from the old coil

use a feed direcly from the ignition barrel (and make sure u tap the feed that stays live when cranking ;) )

[justnovas]

Black wire above gearbox goes to black wire in old gsi loom on bulkhead
Ing live
Red to battary live for ecu
Red/blue near ecu black plug fuel pump out put to red/blue to fuse No1 nova fuse box.
If wiring ok check feed at fuel pump.
Still could be lots of thinks.........

[jasononline]

Yeah thats hows it wired. The fuel pump is running when cranked. I have a spark at all 4 plugs, and it seems to be turning over at the right speed

[Aragorn]

are your injection plugs on the right way round?

is it logging any fault codes?

[justnovas]

After wiring is ok. you have a spark at all 4 plugs, And fuel you need to look at timing, or compreson
Are the plugs wet??

[jasononline]

Sorted it. I found a broken wire in the loom from the coolant temp sensor. Runs great now. :lol:
I have another question
On the Cavalier loom what is the single plug down by the coil for? It has a single 0.5ish green wire. The plug has a red seal on it.

Cheers

Jason