firstly
car is a uk my00
mapped by jgm

seem to have a little problem
when booting it (foot full down on pedal)
it seems to boost ok then all of a sudden the car jolts (easy wasy to explain like there is no fuel for a second)

last time it was mapped simon did say the maf was ok

anyone ??

 

plugs ?

 

Just had one the same we changed plugs leads coil pack pump..... turned out to be maf mate my bet is Maf

 

plugs have just been changed recently

when it was mapped simon said the maf was still ok
is there anyway of checking if its the maf without buying a new one ?

 

unplug maf when running car and if still runs its fooked. u got fuel cut sounds like

 

ok will have a go now and see what happens

when it does the jolting thing there is a strong smell of petrol in the car

if it is fuel cut how do i stop it from happening ??

will be back in a min and let you know the outcome on unplugging the maf

 

right just tried unplugging the maf
and the car just about cut out but did manage to just about keep running (just)

 

when i unplug mine it cuts out immedietely. u can do a error test with plugs under steering wheel but dunno if maf will show up. fuel cut is when it boosting too high. this is 1 thing but another is fuel not getting to cylinders but this would happen even on idle or cruising etc but if only happening on full throttle its sounds as if fuel cut. check all your boost pipes are in place

 

it only just kept running might be cos the car was still running on choke
have checked all the pipes and all seem fine from what i can see

the car had just come off the rollers and they said there was no issue with the boost 1.4 (didnt happen on the rollers , but did on the way there and back)

and it only does it on full throttle

think i need a visit from jgm

thanks for your help

 

yea u prob best askin the map. i got mine mapped by him an had no issues whatsover. is it a 2 port or 3 port solenoid your using

 

using a 3 port , i supplied it and he fitted it when he did my first map

have mailed him and hopefully seeing him thursday

dont like keep pestering him as i know he is very busy all the time ...

 

yea he is. 2 ports are very good holdin g boost an he done same with me with 3 port. it strange how its jolting as when it left it was perfect. it might need another tweak with the laptop

 

Did you get the air/ fuels done when it was on the rollers, reason i ask is because i had the same problem turned out to be a falty maf which caused her to run lean which in turn caused engine damage (low compression on number 1 cylinder) so just a warning incase you are still driving her everyday


Mike

 

not sure on the air fuel issues but surely the people running the rollers would of said something ...

sure simon will be able to double check everything and put my mind at rest and sort the issue

 

I wish people would stop repeating this cr*p, it proves nothing one way or t'other. Helps nobody and in many cases causes more problems than it solves.

 

so who created this **** then splitpin!!!! seeming though on this site all we do is try to help eachother an im njot experienced as u an u probably made the subaru by the sound of it. if u know his problem u say yourself as your info could be ****!!!!!

 

I have no idea how it started, but then again I'd put a reasonable amount of money on you not knowing either so I'm not sure what point you're trying to make. It's one of many urban myths that float around this place getting repeated seemingly without question. Until someone questions them, which is where we're at now.

I appreciate your intent may have been to help, but whether you like it or not, posting duff info is not the way to do that, and the nature of online forums is that someone posting info that is wrong is going to get corrected at some point.

Unfortunately this particular "test" is sufficiently wrong that you could lead someone to cause serious damage to their engine by following it and accepting its results at face value.

Eh? Any chance we could have that again in English, please? I've answered Phil's post in the other thread he started. My information could be ****, but probably isn't, givenit's based on extensive first hand knowledge both of the behaviour of the car in the real world, and of the way the ECU responds at code level to different sensor inputs, including signal drop-outs and error conditions.

More than enough to know not only that your test doesn't work, but also to know why. Would be great if it did, as we'd all love an easy way to spot a failing airflow meter, but unfortunately your "test" can "pass" dangerously degraded sensors as good, as well as damage good ones. You might have meant well when you said it, but in practice myths like this do more harm than good, and unfortunately there's only one way to debunk them.

 

i suppose but im only goin on what goes around this site which if im wrong well scoobynet is about being wrong then. end of day all u have to do is say no thats wrong mate the info im giving is not the way. im genuine user on here. not just a randomer who comes an goes. u are good an i wish i knew your knowledge in all this to point some1 possibly in the right direction but im on here ' say. maybe i shud stop posting

 

thanks guys for all your info

i suppose this is what the forum is all about to find whats right and whats wrong

jgm is hopefully going to fit me in on thursday so hopefully he will be able to put it right or point me in another direction

thanks again phil

 

no worries mate. sorry my info was wrong but jgm has been in this business for years. im sure he will sought it for ya