Hello all, my wifes car just started playing up 98 Classic Turbo UK model, drive car to work ok, drive home ok, drive to shop and back car then starts to misfire, hesitent to rev, trying to cut out but only when engine hot, feels like water in fuel but not sure because bought fuel from different stations.
any idea Guys.

cheers jason

 

could be a number of things.
are the fans coming on straight away. If so its the engine temp sensor.
but sounds like a doggy fuel pump to me, happened to me on several impreza's. start messing around like you say, then they just die when you least want it to

 

could be your MAF sensor or boost selenoid! try taking off your boost selenoid and cleaning with a bit of brake cleaner...

if you think its bad fuel, try adding a little octane booster

good luck

 

were is the boost solinoid thngy?

 

Here

https://www.scoobynet.com/general-te...-solenoid.html

But doubt it is that unless you're talking about hestitation due to overboost (ie, 4th or 5th gear with your foot to the floor)

 

yip thats wot i fort it was but on that pic the pipe at the top **** of ther and dose a loop bk down to the bottom 1! is this rite or shud the top 1 connect to sumthing?

 

ok, got car back home, thought the dreaded head gasket had gone, could still be te case, removed and flushed rad, ripped thermo out, changed plugs, car boosts OK, gave it large and performs ok, but gentle driving car seems hesitant not smooth like it used to be.

any ideas cheers jason

 

i reckon you should change your air filter/induction as if it dirty or blocked, you could be sucking in contaminated air or not enough air for the appropriate air/fuel mixture (charge). your maf sensor could be playin up your response

good luck

 

I am having a similar problem. Part throttle epsecially from cold I get a missfire so bad it is like a mild kangarooing, full throttle seem fine?. Im poping down stairs in a min to inspect the spark plugs for clues. If that throws no light on the subject (eg gaps or coilpacks) I'll do a compression check, then pop them back in then get the brake cleaner on the MAF and boost solenoid. If all that fails then I will start looking at fuel pump and filter, fingers crossed it wont go that far

 

just check ya maf sensor!! i took me induction kit of sprayed that into it and cleaned it and all me problems have gone! the car is back to normal and have full power!!! ive had her serviced! £800, new coil packs £200 new crank and cam sensors £100 and it all boiled down to £1.99 for sum carb cleaner!! but shes back and been out all day in this heat and shes still good! thanx for all the help!

 

All I ended up doing was taking out the plugs, which had some grey deposits on them, gave them a clean, cleaned the maf and cleaned my airfilter all with.......carb cleaner! When I first Drove he the problem was still there but alot better, and as it warmed up it drove fine again. The final test will be tomorrow, from cold but so far so good.

 

cheers guys, keep me posted.
many thaks jason

 

well, cleaned MAF today with elec contact cleaner and no better or worse, still hesitates until 2500rpm then goes like a wippet, very confuesed.

any ideas

cheers jason

 

How far did you drive it? It took mine for a 30-40 mile trip and it didnt get better till atleast 10-15 miles in

 

took it about 7 miles will be taking it further tomorrow, will keep you posted

cheers jason

 

just been for at least 40 miles still the bloody same, should have kept the faith with my cossies. LOL

cheers jason

 

ok, car in garage, my friends, changed fuel and air filters, lambda sensor, still the same changing coil pack and leads tomorrow, fingers crossed.

cheers jason

 

Yeah mine has come back. Its still there just very slight compared to how it was. Moneys on the coilpacks methinks. If you have a multi meter you can check the resistance on the packs to see if there fubared.

 

OK took the car to Hyeline in Cardiff today , diagnosis MAF shagged, £261 plus Vat from dealer, ouch!!!!

cheers jason

 

All sorted, took car to ACE MOTORSPORT today 01495 244555, Andy nice chap, new MAF, £358 with diag, car runs a dream, def going to use agian and def recommended.

cheers jason