Took the car out to the gym tonight and I have a bit of a problem (was fine the last time I used it, on Wednesday )

Sounds rough and the whole car vibrates, a bit like a v-twin. I increase acceleraton and the vibration seems to get worse but the noise seens to be coming from behind me, from the exhaust.

On idle the AFR is around 14.5 but under load it is increasing up to 17

Too dark to do anything now but tomorrow I will check the plugs and the injectors .....

What else should I be looking for?

 

A stab in the dark, but I'd suggest the fuel pump would be worth looking at.

 

I'd guess you have lost a cylinder Steven. Probably and injector gone bad / coil pack / AEM driver / spark plug.

Noise from behind you is just the odd 3 cylinder pulse. Losing a cylinder is a prety destinctive and nasty sound on a 4 pot!

Either that or a major air leak.

 

Also check your SC is still attached (belts and pulleys)

 

I cant think of anything other than what Mark has suggested, i guess look at your sensors if you can monitor.

I think Mark could be on the money here, lets hope it isnt a anything bad

 

Like the new Avatar Aj

 

Good aint it , better than the beer goggles one - as i dont have a ratch these days with a longterm GF .

 

Just cruise around with the guns out, a new one will arrive soon enough

Steven, i'd heard that it's quite common for injector drivers to fail on the AEM so that's quite a possibility.

You could prove it by putting the OEM ECU in, but you have bigger injectors so that wouldn't work so well.

Putting your OEM injectors in and running the AEM on a standard map would test the AEM itself. Testing with the OEM injectors and ECU is another step but if you do that first it wouldn't prove it was an injector or AEM issue.

Obviously the above would just be at idle, or SC belt off.

But i've had a drink and may not be thinking straight

 

 

Someone had failed injector drivers not so long ago in a standalone didn't they?