finch81

Having serious trouble with MY99 turbo, cant acclarate past 2,500-3000rpm, below that the car is ruuning fine, idle is o,k aswell, its as if the car just wont boost?, it is the same in every gear, couldnt get over 40mph this morning on the way to work, over taken by grannies, buses and allsorts, any idea's?
it's like a bogging down surging/spluttering feel

regards

fred coupe

ive got a problem with that aswell my wr1 wont go past a hundred

finch81

forgot to mention, it runs fine when first started up for about the first few minutes , reving freely , and boosting fine, thought it might of been limp mode but doesnt that limit you to about 4.5k revs?

finch81

fred, does it happen in every gear?

new2scoobs

Had this on mine and it was the MAF totally fubard

fred coupe

yeh it hapens in all gears

Deano_P1

Sounds like the MAF mate.

finch81

im trying to figure out why it runs great when the car is first started up though?

classic Subaru Si

is the engine light on mate? When my maf fcuked up it did the same, and the engine warning light came on too!!

new2scoobs

mine idled fine but was down on power when you tried to drive it, new MAF and all was well. Maybe try cleaning yours if you don't want to replace?

fred coupe

the man at subaru said mine wasnt maf

finch81

Nah there's no CEL lights on at the moment, i have just reset Ecu over the weekend though so may come on over the next few days, i origionaly thought the problem was the fuel pump and have replaced the origional with a walbro pump, any ideas how much a MAF will set me back and how easy it is to fit?

fred coupe

yeh should come on pretty soon

classic Subaru Si

Give it a good clean first before you buy a new un - but i'd say your looking at about £90, depending on what model! Might worth just buying one as a spare anyway, not good to drive it with a goosed MAF!!

fred coupe

mine cost £100

ReggieMY99

Sounds like your car have been into limp mode, hence the reduced boost and power, yes it could be the MAF, and it wont give a cel or show up in a ecu diag test

A quick way of testing if its really knackered is to unplug the maf while the car is idling, if it stalls then it could be ok, if the engine continues to run the ecu have learned to cope with the missing signal

saying that, even though it stalls it might still be on its way out

replace the maf to be on the safe side, costs around 80£ very easy to install

reset the ecu after it has been replaced

fred coupe

it dont cost 80£ it costs 100£ cause i got 1 a few months ago

finch81

what would you recomend using to clean it? as it is obviously very sensitive?
also has anyone got a walbro fuel pump? had mine in 3 days anmd it is incredibly noisey, high pitched whine, audible from about 20 meters away its really bad

messiah

Had something similar when I swapped the top intercooler hose and didnt tighten it properly...

New_scooby_04

iTrader: (4)

Nope replace it. Not worth the risk.

Driving on boost with a dodgy MAF = Engine rebuild!

Any specialist will be able to diagnose in 2 mins and replace there and then. Problem solved, circa £80

Much cheaper than 2k plus for a rebuild!

The Walbro is quite noisy, again a specialist will soon tell you if anything irregular is going on. Keep the car off boost, potential fueling problems can spell disaster if the car isn't driven gently untill they are rectified.

Ns04

ReggieMY99

As above just replace it, cheaper then an engine rebuild

vindaloo

MY99 MAF can't really be cleaned. It's a different type of technology to the earlier cars. Thin film, versus hot wire.

Seconded - get the car to a specialist for a diagnostic.

J.

finch81

Anyone recomend a good garage for this , Northeast preferably tyneside?