Taken my MY94 to 2 top tuning firms with an intermitent boost problem most noticeable as hesitation in 1st gear (as boost cuts in) and surging at 3,000rpm in others.

Neither firms have been able to diagnose the problem, even with a select monitor attached an thrashing round the countryside.

Can the select montitor detect when the sparks not occuring or blowing out anyway ?

So I think I'm gonna decide to bite the bullet and buy a set of coils anyway, as it's probably due some and from what I've read on here it may well be the cause !

 

B4 you do carry out this check, Remove plugs and check gaps (0.7/0.8mm). Close up to 0.6mm. Test and see if the car still has the problem, if it is reduced or eliminated then ots worth changing the coil packs otherwise it may be a waste of money.

 

Are you Bob Rawle from BRD, if so I was gonna give you a call today ?

 

Forget the standard coil packs, replace them with Bosch externals... half the price with a massive improvment in torque and general throttle responce. Email me for model numbers, install info.. etc

-Mark.

 

Mark....you have mail

 

mark/crusty- u have more mail. pumpers.

 

Mark -you have even more mail
Dave

 

Thanks for the gap info

As for flushing out the solenoid do i need to remove the air filter box to get at the lower bolt as the solenoid is on a bracket alongside two other widgets(?) which i assume needs to be taken off the wing.Do i then pull off said pipes and flush.What about the solenoid itself?
Told you i was a beginner!

Peter Stone

 

The easiest way to get the solenoid out is to remove the 3 bolts that hold the bracket to the wing. Lift the bracket up and remove the solenoid from it's 2-bold mounting.

Disconnect the pipes from the solenoid and fill them with brake cleaner, allow a couple of minutes for it to work (if you really want too, you can then blow down them or use a foot pump to blow the cleaner through)

Then fill the solenoid with cleaner and do the connector thing under the dash. If you don't want to mess with the connectors then connect it all back up and go for a blast.

 

Just heard form Mark , thanks mate will try it when I get my car back .
Cheers Dave

 

Mark - you will have more mail. Maybe you could enlighten us before u have more mail then Osama.

 

Mark-you have yet more mail

Peter Stone

 

Anyone heard from Mark yet ?
What time is it in NZ anyway ?

 

Hi there

Am i missing something(probably)but in my handbook the suggested gap for the plugs is 1.00mm but you're talking about 0.6-0.8mm range.I recently increased my gaps as i have got a hesitation problem too.I am going to try flushing out the wastegate solenoid and pipes but not sure exactly how to.Can anyone help with instructions for a beginner!
For info my scoob is a uk MY99 4-door with SS backbox and ITG filter.

Cheers

Peter Stone

 

Gap should be 0.7mm, the manual specifies 1.0mm for the plugs listed. But apparently the Plugs are now obsolete, so those provided by Subaru dealers require a different gap setting.

The best thing to flush the Boost solenoid with is brake cleaner and the easiest method to get it to trigger is to connect the green spade connectors under the dash by the steering column.

Don't do what I did the other day and use a battery charger to energise the coil (off the car in my garage). Because brake cleaner is highly flamable and the sparks from connecting and disconnecting the battery charger 12V will ignite the brake cleaner. Ended up kicking the solenoid round the garage floor to try and put the fire out (in my case it was the purge conrtol valve that I was cleaning). I won't be doing that again !!!!

 

Anyone found a source in the UK for the Bosch MEC723 coil pack.

My Local Lucas report that it's not a recognised Bosch number (in the UK) ?????????????

What's it normally fitted too, we may be able to source it that way ?????????

 

i work for bosch so i'll get a price/part no tommorrow when i'm in work and try and post it in the evening when i get in
richie

 

Scott,

I tried yesterday afternoon and got no joy. Let's hope Richie can help.

 

Ingrams in OZ have e-mailed me the following :
Quote : "Bosch part no. MEC723 (transformer type coil) replaces the following 10 digit part no.

9 220 061 438
9 220 061 441
9 220 061 443
9 220 061 467
9 220 061 468
9 220 061 474
9 220 061 476
9 220 061 478
9 220 061 479
9 220 061 481

Bosch do not list a vehicle application list as such.

Please let me know if you need any further assistance, as we would should be able to ship a MEC723 from here if needed."

 

Does that mean there are 10 different coil packs which have been replaced by the mec723 or am I just thick? And is it the right one for my my93wrx? And how much are they? And can you get the old ones in England? And if so which one of the ten part no's applies? Does this make sense?? HELLLLPPP . pumpers.

 

Richie-are you there to make sense of all this?Or do we all end up with 10 coil-packs

Pete

 

From what I make of it, if you go to your local Bosch dealer i.e Lucas, and quote any of those numbers you should end up with a single coil whci may well be referenced or marked MEC723.

You will need four of them + 4, 8mm HT leads (the length depends on where you mount the coils). The Suggestion being to mount 2 coils on or around the Drivers side wing, the other 2 on the opposite wing.

I think these coils are about £20-£25 each, but have yet to get back to Lucas to find out.

 

yep sorted i'll have a price by fri evening as i needed a 10 digit no and the bosses dont always like you spending half a day reading catalogues
richie

 

still waiting for a price from work
richie

 

Anyone had any joy with this yet. I might give Lucas a call later for Prices

 

Scott,
I've been to four different motor-factors but no-one recognizes either the MEC723 designation or ANY of the 10 digit part no's. Can you please check the numbers for me? Anyone else found the same ?

Thanks,
John

 

Any news or prices yet?
Cheers Dave

 

Any news yet ?

I may of found a source for Cheap new Origional Coil packs approx half price. As soon as I have confirmed they are correct I shall repost.