[cfbrfc]

We have an Vauxhall 1.0L Ecoflex 3 Cylinder Engine with a start up problem/Running problem .

sometimes it starts up and sometimes it doesnt. when it doesnt start up it sounds like its very very close to starting

and when it does start up it sounds like the exhaust has fallen off but the noise is coming from under the bonnet.

It was driven for 2 days when it was loud as we thought it was the exhaust but it was slowly loosing power until cut out and wouldnt start back up again until the spark plugs had been replaced. We have also tried running it with the Air Metre unplugged and made no difference

We have so far replaced the following

Spark Plugs (very dirty)
coil pack (already pretty new)
Oil Pressure switch
Crack Position Sensor
Thottlebody

We have also tried disconnecting the exhaust incase it was blocks or collapsed

I would be very grateful for any advise given.
Thanks

 

[g4vvq1983]

Engine won't start some real basic tests to do.
A 12 V bulb circuit tester, multimeter, battery drop tester and code reader, are useful tools.
Petrol's (diesels below)
1 Does the engine turn over (check battery, starter, connections, immobilzer)
2 Do code test (use good code reader, of eobd origin)
3 Make sure Immobilizer is deactivated (may have canbus problem, check light on dash)
4 Check for a spark at plugs (put plug in end of lead, earth to block, crank over)
5 Check for fuel pressure and delivery and fresh fuel (press schrader valve in on fuel rail, try easystart)
6 Check cam belt or chain isn't broken and timing is right (look in oil cap hole and crank over)
7 Make sure air can get in engine and exhaust isn't blocked (The engine is basically an air pump)

Diesel's
1 Does it turn over fairly fast (check battery, starter, connections, immobilzer)
2 Do code test (use good code reader, of eobd origin)
3 Make sure immobilizer is deactivated (may have canbus problem, check light on dash)
4 Check compressions are not low
5 Make sure cam belt or chain isn't broken and timing is ok (look in oil cap hole and crank over)
6 Check fuel pressure and delivery (try easystart to test it)
7 Check fuel system of air leaks and clean fuel
8 Make sure air can get in engine and exhaust isnt blocked (The engine is basically an air pump)
From Fred in Essex 2017.