Discussion in 'All Things Technical' started by Scutch, Feb 12, 2007.
Also, that knock level of 16 is fine, right? :?
It does look like a fuel supply issue, but I'm confused, you said that you had filled it up yesterday lunchtime and it still did it?
What happened to the 1.55bar overboost?
Even with the wrong bag filter, it shouldn't do it with a full tank, under half is different!
Does it only do it in second or in higher gears too?
The bag filter supplied with some fitting kits isn't only different in size, it protrudes from the pump at a different angle and this can cause problem on hard acceleration in a straight line.
Could also be the pump not fitted to the pickup assembly properly and moving under hard acceleration.
I only filled up to half a tank, as I had left my wallet at work! lol. So when the test was being carried out, I only had just less than half a tank of fuel.
The 1.55bar figure is the peak figure on my Defi's, and as such I dont know when are where that occured. However, when accelerating and hitting the problem judder, I noticed on the Apexi controller that is was actually boosting to a much lower figure, as shown above. (thankfully you're advice on checking these figures on the controller worked, as I wouldnt have known I could do that ).
So I too now believe its a fuelling problem. One I did not encounter before the mods and map, even running on a very low tank on occassion. Thats why I figured it must be the fuel pump and its fitment, perhaps.
In straight line tests, there were no problems, nor did there seem to be when coming from a left turn at a junction. But I did have just a tiny smidge under half a tank, and I would have thought with this much fuel it would have eradicated the problem if it was fuelling.
It only does it in 2nd I believe. Havent tested in 1st as I'd rather up to 2nd early on. I could test it I suppose, but as a daily drive I dont tend to drag in 1st that often.
I came off a roundabout in 3rd to test, too. I accelerated and there was no problem. Obviously a longer time to pick up with revs and the turbo spooling, but no judder.
Also, this might be way off, but my last service (or service prior) suggested that I might need a new lambda sensor as the emissions were out. Could fitting the decat etc along with this 'needing replaced' lambda add to the problem mentioned?
Unlikely with the Apexi, did Andy not comment about the health of the Lamdba sensor?
Nope. Not a sausage. Maybe it was ok and the dealers were trying to get some more cash lol
Only thing he mentioned was the engine tray flapping at high speeds (being removed tonight) and the Induction kit being bracketed to engine which could cause maf failure and also the 22B vents being open meshed. Now re-covered.
Is there a problem with Scoobyteknix website, too? Cant seem to get on :?
<Hijack> Scutch, what induction kit have you got fitted? Reason I ask is I have 57i fitted and the bracket is bolted to the coolant tank, which I was led to believe avoided vibration which was known to kill maf's <hijack over>. apologies..
Yup. Same kit. Could you supply a picture of said bracketry?
So your bracket would of been bolted the same way as mine, what is Andy recommending you do to stop it vibrating scutch ?
A nice cold air shield should be able to support the MAF and Filter and allow the convoluted section of intake pipe to absorb any vibration from the movement of the engine.
Dont suppose you got one of them in your garage Andrew?
not a bad idea that :wink:
http://i64.photobucket.com/albums/h174/ ... 0_0072.jpg
That looks very nice. Are these available off the shelf or are they all DIY jobs? Sweet
I have a template for a MY97-00 car, I've made them for several cars including another P1.
http://www.teamcarr.pwp.blueyonder.co.u ... shield.jpg
Superb Andrew. Would that still fit with the FMIC and pipework in place? How much do you charge for making said piece? Looks great. Could probably get on with that myself to be honest, or give it to someone who could, but it would be nice to get a figure off yourself if you'd be so kind
Not really got the time to make one at the moment, although I do need a new one for mine now.
Your car will be slightly different wrt opening for intake (MAF) and FMIC pipework so needs to be done on the car for best fit.
I've got plenty of ali sheet so I'm happy to make you a blank without the cutouts when I do mine in the next couple of weeks and you can get it customised to fit.
Yes please mate. That would be spot on
Would this cure my hesitation problem too? lol
OOhhhhh can I have one as well mister Carr... :wink: :lol: :lol:
I doubt my metalworking skills are up to your exacting standards
Plus the upper profile is meant to hug the underside of a facelift ali/steel bonnet, not some overpriced plastic thing :wink:
I'll make a few blanks when I do mine, tbh that bit is easy once my saw table and sheet bender are setup, it's the 5 hours of tidying the garage and finding the bloody things that's hard work.
Ahhh, but you haven't seen my new bonnet have you...?? :wink:
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