My C20LET Nova won't start.

Still the crank sensor IMO
If not, then possibly ecu

i didnt think they primed? i just thought the pump started when cranking. as ad said crank sensor is still the next thing to try

Earth problem by the sounds of it to me,

If you need a wiring diagram for the C20LET engine loom - send me your Email address keith and I'll send you one that I scanned in from work


Dave

if its firing with a live connected to the pump then the crank sensor is fine. the fuel pump relay also powers a few vital engine sensors and will stop it sparking if faulty.

id try a known good fuel pump relay 1st tbh.

when my fuel pump relay went i had no ecu light and when i rplaced it for my spare one tre ecu light came on and started i was getting no fuel up to rail and no spark

im gonna ask my fella if he has any idea's about ur nova?

fuel pump doesn't prime until engine turning over, what voltage have you got at the coil when igntion is on?

double check that some hasn't been inside you ECU and put the chips in wrong way round it happened to me took me a while to realise

have you earthed the engine loom especially the 2 wires on the fuel rail the other just attach this to your engine block or starter motor bolts, does the rev counter go up when cranking engine over?

Quote:

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Originally Posted by S1 RST

fuel pump doesn't prime until engine turning over, what voltage have you got at the coil when igntion is on?

double check that some hasn't been inside you ECU and put the chips in wrong way round it happened to me took me a while to realise

have you earthed the engine loom especially the 2 wires on the fuel rail the other just attach this to your engine block or starter motor bolts, does the rev counter go up when cranking engine over?

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I'm going to try the ECU in a friends cavalier turbo tomorrow, and collect a crank sensor and fuel pump relay. If those dont work then I have the wireing diagrams (cheers dave/fearless) and i'm buying a multimeter to check every wire etc.

That will probably be after billing though as i'm busy all week :(

Keith

if im being ignored fair enough im only trying to help.

1. as i asked a few pages ago. do you have an enging management light wired up?

2. did you say that if you link a live feed to the fuel pump the engine fires?

in my opinion it is utterly pointless trying other stuff if an EML is not wired in.

be sure to check all earths on the LET's loom. also add a couple new earths from the block/alternator/head to the chassis. the LET will still run with a fair few of the sensors disconnected.

do you have a copy of the C20LET workshop manual? it covers pretty much everything and can be a big help, i can e-mail u a copy as a pdf if u dont have one.