Technical > Engine and Transmission

starting problem

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kty50n:
Hi all

I start my k reg G40 the other day, it started i touched the throttle the vehicle then back fired ran for about 30 sec the cut out.

i have change the coil pack as there is no spark, that made no difference.
what else do i need to check.
thanks Keith

hayesey:
Hi, welcome to the forum.

so is there still no spark?  Are the spark plug, ht leads, rotor arm and dizzy cap all ok?  The coil you've put on, is it a new one and/or have you tried it on another polo to see if it definitely works?

When you try to start do you hear the fuel pump at the back prime (make a short whirr)?

PeteG40:
could be the hall sender in the dizzy or an ecu relay (they both have a habit of giving an intermittant fault)

does it crank and turn over??? or just do nothing when you try to start it?

kty50n:
[quote pid=1902 author=peteg40 date=1214295837]could be the hall sender in the dizzy or an ecu relay (they both have a habit of giving an intermittant fault)

does it crank and turn over??? or just do nothing when you try to start it?[/quote]
I removed the main lead from the coil and earth it to the engine and got no spark, so I thin the dizzy is ok, the vehicle will crack over and I use a new coil to check.
I have not checked the fuel pump yet but I will do
the ECU relay what colour is it and is it next to the ECU?
Thanks for responding so quickly
Keith

PeteG40:
its one of the two relays next to the ecu

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