Revs drop to 0, check engine light, doesn't stall

[ollieglanza]

Started on the way home a slight judder/misfire around 2krpm.just went out again and was worse. Revs even dropped to zero then went back up again this time. Happened a few times and conked out once and wouldn't restart for a while.any ideas what this could be

 

[dac69er]

do an error code check first of all. quite possibly ignition related if you haver the same damp foggy weather as we have here.

 

[ollieglanza]

The engine management light goes off after 20 secs or so? Will the error code still flash up?

 

[dac69er]

as long as you dont remove the efi fuse, unplug the ecu or disconnect the battery before you check for errors.

 

[steve_322]

Check the earth on the inlet at the idle control valve, seen this cause the same symptoms.

 

[ollieglanza]

cheers for the help guys! Started fine this morning and no issue on the 20min drive to work. At the weekend i'll check the earth, change the plugs, clean the throttle body and icv for good measure

 

[ollieglanza]

Spoke to soon, happened again. Revs stay at 0 then with pedal flat starts up again

 

[dac69er]

have you done an ecu error check? takes a few minutes and should give you a clue

 

[ollieglanza]

Tried this morning quickly and didn't work, think what i used wasn't conductive

 

[dac69er]

what were you using? a stick?

a paperclip works well.

 

[ollieglanza]

what were you using? a stick?

a paperclip works well.

Haha no was a clip of some description, try again tomorrow with a paper clip

 

[ollieglanza]

Tried with a paper clip, no luck again

 

[dac69er]

you cant be doing it properly or something has been messed about with somewhere.

 

[ollieglanza]

will have to keep trying

 

[ollieglanza]

Did it!!! Fault code 14 ignition/amplifier

 

[dac69er]

what electronic modifications do you have on the car?

probably a bad connection/dodgy wires or water ingress issue.

 

[ollieglanza]

None! Just bought new ht leads and need to do the plugs and check the earths. Did wash the car sunday and issue started monday. But drove it inbetween

 

[dac69er]

water can take a while to get in and cause issues. unplug all the ignition components (coil, ignitor, distributor) and check for any ingress. also just check over the wiring to these items as they may be damaged. you could try wigling the wires around those areas while the car is running to see if it makes any difference.

 

[ollieglanza]

Hard to tell what works/hasn't worked as its intermittent! Will give it all a once over anyway!

 

[ollieglanza]

Think i may have sold the issue, noticed some wires had snapped on this switch. Temp bodge back together and issue hasn't happened again. Anyone know what its for?