was giving my 1994 impreza wrx at bit of a tonking ( not best idea i know ) all of a sudden the boost went down and there was blue smoke coming out the exhaust and when pulled over there was oil on the underside of the bonnet and the dipstick was popped out part way and there was oil all over the passenger side of the engine i managed to get the car back running like a dog and know ive cleaned it i restarted the does not seem to be a oil leak but it sounds like its running on 3 cylinders can anyone shed any light on what they think this may have done please ????????

 

Could be headgasket, could have holed a piston.
What mods, what remap, who remapped it, when?

You would be well advised to get it to a specialist, NOT a dealer before driving it again.

 

i got a specialist i do use a guy called brian at cams performance in blackburn its a closed deck its been decatted its not mapped its just got a piggy back chip in the ecu its got a hks induction kits and a forge dump valve . i dont think the head gasket as gone cus there is no water in the oil and the water filler bottle is still topped up and it was giving any issues with the heating i think piston trouble maybe like you said

 

I'm not to clued up on the chips nowadays but is it advisable to be running those mods on a piggyback chip?

I thought they were only intended to operate on standard cars unless I'm mistaken?

 

if the hg has gone between bores the oil and water wont mix.

but to blow the dipstick out and **** oil everywhere does not sound good. as the block would have been pressureised to do this, so its either piston ring blow by, or a hole in a piston.

if you can, try and have a compression test done.

to see what cylinder its missing on, pull the injector clips off one by one unit you pull the one that makes no difference to the engine note.

unfortunatly, it doesnt sound good

 

not having the car mapped propperly after doing the engine mods is 99.9% the cause of this chaps potential enigne failure imo

 

That's what I'm thinking as well, decats, induction kit's, dump valves. I'm wondering if he uses normal unleaded as well?

 

its quite surprising how little mods like that can have such a great effect on certain enignes.

on a n/a engine you would probably get away with it, but is seems the boxxer is on the edge already so ANY change to the induction/engine/exhaust side of things can be quite detrimental.

as an example a few years back i got a couple of track passes for japfest, my mate in his skyline agreed to let me drive his car for one, and he drove for the second.... he let me go first.

unknown to me he had fitted a hybrid turbo, a welding tip inline with the actuator to restrict it, resulting in higher boost and fitted a big fmic...

well, 5 laps in i had cooked the brakes and was doing a cool down lap when it started pissing smoke out the exhaust....

pitted, it ran rought and would not resart some time later...

got the car towed home, comp test showed zero compression on 4 out of 6 cylinders...
stripeed the engine and found it had cracked the ring lands off those 4 pistons.
this was of course all my fault and he expected me to cover the cost of the rebuild. i got him a very good deal on a set of wiseco pistons and gave him my time to rebuild it.

and when it was done the first thing i made sure he did was get the ****er mapped!

 

You would be surprised at the amount of people on this forum who say my mate's cousin has an Escort without a remap and a induction kit and it's fine or my cat's neighbour has a decat on his Honda without any problems, they just don't realise these are slightly different, I don't even argue now I just leave them to blow the ******* up TBH.

 

you cant educate pork LOL

 

Sounds like some serious crank case pressure. I would say it was running lean and holed a piston. Do a compression test to confirm.

 

Hi sorry I'm new to this but it's more of a question if I'm allowed to ask just got my first scooby a 2000 classic I don't know much about them .its got a piper cross filter and yellow injectors fitted .Wot I want to ask is I've just bought a full 3inch decat can I fit this or will I have to remap it ? Also it's got a td04 will fitting a td05 16g make any diff don't want to be spending money for nothing hope these are nt stupid question s cheers darren

 

Any change to the engine setup and you will need to have the map altered.

 

I really don't get how people change over turbos etc and don't even consider a map on a change like that!

 

Hi mate thanks for reply yer I knew if I changed the turbo was defo going to need remap if I do change turbo will change fuel pump as well but was hoping I could change decat without the map .might just wait change turbo decat and pump all at same time then get it mapped

 

As said above by others, quite likely to be det damage on one or more pistons causing excessive blow-by and pressurising the crankcases.
Rebuild time I think.

Mick

 

Actually, pigs are quite intelligent - it's humans I worry about!

JohnD

 

Phone Brian !!!! He really does know his stuff and cams are the only people ill let touch mine now ! I've got his number if you need it !

 

For the record my map gets looked when ever I change anything. In fact the mapper is the first person to drive it after any work at all !