[urq] Injectors out under boost?

[spot.ontheroad]

The fixing points on the plastic shroud on my WR were broken when I got it 
so I just cleaned  it up and fit it in place with two tiny holes and locking 
wire. Now of course this does not hold the injectors in so I use the metal 
"rail" as fitted to the non-turbo I5 motors (in my case from a KV motor) to 
hold the injectors in. This is way more substantial than the plastic shroud 
and then gives you a handy location to wire the shroud to.
Also if you're going to be messing with this you may as well change the 
injector seals and be done.
Hope this helps

Keith

'87 WR
----- Original Message ----- 
From: "fdekat" <fdekat at sentex.net>
To: <urq at audifans.com>
Sent: Monday, October 03, 2005 10:57 AM
Subject: [urq] Injectors out under boost?


>
> HAs anyone ever had a CIS injector sort of 'come loose' under boost?
>
> I'm trying to sout out a 'miss' under boost. After a long pull under boost
> (Say a big hill), I get a condition where the motor sounds sort of like a
> miss, and I can smell  LOTS of fuel. The sound when this 'miss' happens is
> sort of like a long running mellow fart, for lack of any better 
> explantion..!
>
> The plastic 'shround' that is supposed to cool the injuctors is 'sort of' 
> in
> place, but since it's been broken (aren't that all?), I'm not sure it's 
> doing
> an effective job of holding in the injectors..
>
> My theory is that an injector may be coming out just enough to let boost 
> air
> (and fuel) out past the injector. THat would explain the miss, and the 
> fuel
> smell.  Repeated attempts at full throttle then can provoke the miss with 
> ANY
> boost (as I figure the injector still could be loose)
>
> After letting off for a bit, the vacuum in the intake pulls the injector 
> back
> in, and things are good again.
>
> So, if anyone has had an injector come out, what were the symptoms? 
> Similar
> at all?
>
> (A further detail: the MC motor has the original WX 'non shrouded' 
> injectors
> in it. Maybe a case of them not matching the MC's head shrouded injector
> holders correctly?)
>
> And second, does my theory even make sense?
>
> ( I was thinking of testing my theory by removing the plastic injector
> shround completely, and seeing if an injector pops right out. But the 
> thought
> of fuel spraying everywhere on the hot motor if an injector pops out makes 
> me
> think that's not such a good idea!  Maybe just replacing the injector o
> rings?)
>
> Regards,
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