hi all,

 

have fitted new smic's, took it for a run and ooohhhh no, major hesitation/stumbling on full throttle, my thought, must be a boost leak.

 

i have made a leak detector as seen on this forum and cannot fill enough air into the system, after pumping for quite some time with a foot pump, to find any leaks.

 

so i tried this.... with the engine running i hold my hand over the intake hole the vacuum seals around my hand and i can hear hissing from the pass ic. like its sucking air, can this confirm a boost/vacuum leak at this location?

 

cheers people,

 

al.

foot pump is no where good enough mate, you need a compressor and I don't just mean t small tyre one ;)

how much pressure do u need to put into the system?

if anyone is local to me and has a compressor with fittings so i can do a boost leak check, i will be very grateful.

have tried with footpump and 12v car tyre inflater, both no good ^^as vijay said^^.

am near bury st. edmunds.

 

thanks,

 

al.

I've managed to use a 6 litre compressor which are the small portable ones if anyone has one of those near you ;)

 

If you have a leak, you need something that can deliver more air than you're losing to build up pressure which is why you need a compressor with a tank to deliver a good flow of air

update.....

 

i took the bumper of again today and everything looks o.k.

may have a small leak, not sure. put it all back together and went for a run and it is still stumbling around 3500 and upwards and when she hits 6000, thats it, no more go in her at all, just sits at 6000 stumbling, like its running on 4 or 5 cylinders.

got new injectors, coilpacks, new connectors on them all, series II ptu, jd chip....

she runs fine with just a little gas, but pedal to the floor and its goodnight vienna!!

 

al.

Yer still got a leak mate and with the bumper off was the ideal time to test it.

Did the new SMIC's have a couple small bolt holes on the front face of the cooler, usually on the end tanks ? If so and if you havn't bolted something like the ducts in to them, they must be plugged. A small bolt to suit wrapped in PTF tape is best.

If the above doesn't apply, deffo sounds like a leak anyways am afraid.

Smithy

Yer still got a leak mate and with the bumper off was the ideal time to test it.

Did the new SMIC's have a couple small bolt holes on the front face of the cooler, usually on the end tanks ? If so and if you havn't bolted something like the ducts in to them, they must be plugged. A small bolt to suit wrapped in PTF tape is best.

If the above doesn't apply, deffo sounds like a leak anyways am afraid.

Smithy

 

 

hi smithy:)

 

yes mate, they have got the small bolt holes at the front for the ducts to attach. ""did not think that that would cause a leak tho"". i did not bolt the ducts onto the smic's as they sre much taller than stock.

 

oohhh, so i need to remove the front bumper again:headvswal (4th time!!!) to plug these bolt holes.

 

i love my 300, but not at the moment!!:rant:

Edited October 12, 200817 yr by AlanZ