stevie1982

iTrader: (16)

guys was driving into work this morning, and was behined a fellow classic owner,

we were sitting in traffic and as it went clear he put his foot down, there was a little condensation and as he hit what i assume was boost a puff of black smoke came out!!!

what would cause this would it be over fueling or the turbo on the way out etc etc, just i wonder how many of us drive around looking forward not noticing what is coming out of the rear.

any thoughs

steve

The rookie

iTrader: (1)

Black is fuel, so too rich, most engines (not sure about the EJ) start producing black smoke rich of 9:1, probably a combined result of cold enrichmnet and a big transient compensaion from flooring it, plus some dodgy mods!

(white is condensation, blue is oil)

Simon

stevie1982

iTrader: (16)

dodgy mods!!!

such as?

steve

stevie1982

iTrader: (16)

also i gather over fueling is better than under fueling

but would this cause any long term damage to the engine and turbo?

steve

JohnD

iTrader: (5)

Condensation means the engine was still cold, black smoke probably means he booted it, Mmm - bad boy!
JohnD

jaytc2003

iTrader: (1)

overfuelling is a bit safer than underfuelling but it still isnt safe as it can cause bore wash which means petrol gets in with the oil and then the engine is lubed with this oil petrol mix. Long term not very healthy!!

stevie1982

iTrader: (16)

ok what about the previous comment

dodgy mods!

what could be dodgy to cause this

steve

GlesgaKiss

Had been wondering about this actually...I get white on startup, after about a minute, then lasts for about 4-5 before going away(more noticable on colder/freezing mornings obviously). Glad to know its just condensation, I did hope thats all it was, but was going to get it checked out to be on the safe side.

Alan

GlesgaKiss

sorry, just to add to comment above...that is with it standing in the drive ticking over, not booting it. usually let the car heat up before I even move it.