Hi, Can anybody give me a slight clue as to why my "check engine" light comes on after driving for 20 minutes + ? It has recently been serviced so nothing is low......
I have a 1994 STI import. Any help, would be appreciated.
Thanks x

 

Welcome

Could be several reasons, does your car have any modifications and what fuel do you run it on?

Tony

 

Hi! Thank you!

There is no mods, apart from de cat pipe. And runs on super unleaded ???
Thank x

 

Your decat may be causing it, super is good no unleaded though (tesco 99 or shell v power are the best dont put bp crap in though ) and really on an import you need some form of knock detection (its getting expensive already ) Phormula - Engine Knock, Detonation and Pre-Ignition Detection and Monitoring Systems for a ks3

Also check out here for how to check the ecu codes, fairly easy to do, should give you an idea of what "may" be causing the issue

www.jollygreenmonster.co.uk

Tony

 

Wouldn't the decat put the "cat on fire" light on the dash? Wouldn't of thought it would be on the error codes.

 

It could be causing det (knock) and causing the cel to come on.

Tony

 

Ah! Be interesting to see if the knock sensor error turns up then.

 

make sure u dont have the wrong connecters pluged in while driving

 

hi just go to this link on scoobypedia Scoobypedia | Trusted knowledge for everything Subaru | Knowledge / Reading ECU Fault Codes

and it tells you in detail how to read your fault codes by yourself and what the codes meen
its just a case of connecting 2 wires under the dash

personally it wont be your fuel if your running super unleaded as thats a good thing , and if your not caning the **** off the car you shouldnt need any fuel additives , just make sure pref your running good fuel like said v power from shell or 99 from tesco

bp ultimate is crap stay well clear

 

bp102 , £2.50 a litre and is only availbale at few bp stations around the uk , u could count on two hands how many bp garages have bp102 and a member of staff has to put the fuel in for you ? bp at the forth road bridge has it thats were i get it

the £2.50 a litre is a killer though , would really stick 2 v-power especially as u get that distinct smell from the v-power lol smells good lol

 

what kind of advice is that mate 2.50 a litre get a grip who is gona spend that unless its gona make your engine last forever and give you 500 bhp
the thread started as a check engine light now its onto fuel it wont be the fuel as shes running on super so can we move on now from the fuel

 

aaaaaaaaaarrrrrrrrrrrrggggggggggggg.......I have been using BP!!!!

Oh I had a problem like that mate when I put a new dumpvalve on my car, i lost boost and the engine light came on. so I put the old re-circulating one back on!

 

Guys, your awesome, thank you for all the advice, i'll have a look at all the websites you've given and see where i get!!! :-) Thank yoooo! x

 

i know off three people who use it mate and it was a tip to say that bp sell 102 octane and i recomended sticking to the v-power ???? as i stated THE PRICE IS THE KILLER ???

102 octane fuel will make ur engine last longer in theory btw as theres a lot less chance of det/knock with tesco than bp102 and thats not that im saying tescos is **** coz its not , im saying bp102 u could do a lot more with that IF u want to spend the money

think u need to read posts fully before u post ur own comments mate as i use v-power constantly also so i do HAVE A GRIP i was only suggesting that 102 was available as i have spoke to numerous people who dont know it exists ? and it is in term more a '' racing fuel ''

 

i know the thread started as a cel thread but is it really up 2 u to decide wether or not she or any1 else wants to hear the advice ?? and the fuel topic was brought up and brands were being mentioned so i thought i might add a little

 

wright youve bitten now im just gona reel you in he he he

 

John, a bottle of octane booster is less than 5 quid and gives you 2 ron, a tank full of 102 is 120+ quid and gives you 2 ron, so v power and octane booster will save you around 60 quid

Tony

 

let it drop tony you will upset him even more lol only joking john im not a bad guy really mate

 

So, i done the ecu testing thingy under the dash board and its showing as the Air Flow meter. Have googled it and all systoms seem to tie up to what happening with the motor at the moment. Any advice on where to get a cheap one from, bearing in mind my scoob is an import???

 

Mafs are all the same for that era (any turbo impreza between '93-'96: WRX, UK or STI has the same) - all with the green label as yours should be if standard (the code on your label will be something like 22680 AA160 A36-000 R60).

No more than £40ish second hand as a guide - buy off a forum regular (I'd trust ebay seller if loads of 100% feedback).

 

Wicked. Thank you.
xKx

 

after 20mins of driving nice n warm my monies on 02sensor . don buy oem as silly money get the bosch universal one the only difference is the wires , i bought one and did the wiring , its so easy its unreal and car goes so much better now

 

I think if the maf doesn't work, i'll have to look at getting a cat back it and hopefully that'll do the job. Thanks
xKx