Thanx terry and richard
Yeah i have pulled the fuel pump out and all lines under the hood to check
for blockages, i have a spare pump so i might chuck it in to see if that was
damaged, the silastic was only present after the pump but i will change
filter etc. The missfire is present when free reved above 1500-2000rpm in
neutral and becomes undrivable if reved in gear. I am currently pulling
down the carbies to check all orifices for foriegn material. If the
silastic has made it to the valves and causing probs there is there any
solvents i could remove it without having to pull the head? I will reset
all the valve clearances as per the Dimequarterly article i have as it has
been a bit rattly l8tly.
Thanx again ......Missfire Mystified Tod.
>From: "Terry Rudd" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: <[EMAIL PROTECTED]>
>Subject: RE: Engine Probs
>Date: Wed, 6 Jun 2001 23:50:54 +1000
>
>Tod,
>You've covered most of the usual problem areas but you haven't mentioned if
>you've checked the fuel delivery. Your compression is Ok for a stock L18 at
>cold crank (bit low for a SSS) so your valves etc appear to be good. From
>what you say here I don't think any engine damage has occurred (yet
>anyway).
>You could check that your valve clearances are within spec, check the
>manual
>for the correct technique to adjust clearances on a L engine or ask here if
>you're not sure and need help as I still find that the correct method is
>often not used.
>
>If you have had (had) a foreign substance in the fuel system as far along
>in
>the system as the carbies then the filter (very likely) and pump may also
>be
>blocked or valves not sealing properly. Silastic and fuel results in a
>fairly gooey mess so I recommend that you change the filter for starters.
>
>Is the misfire only evident under load when driving or does it do it
>stationary in neutral as this would give you some clues as to whether the
>problem is fuel starvation or not.
>
>regards
>Terry
>
>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED]]On Behalf Of tod
>matthiesson
>Sent: Wednesday, 6 June 2001 8:36
>To: [EMAIL PROTECTED]
>Subject: Engine Probs
>
>
>Hi ppl
>I have an L18 with an a87 (closed),twin Su's, and ei dizzy and it is is not
>running right. It idles fine but has developed a bad miss above about
>2000rpm ie it starts to backfire and lose all power. I have replaced the
>rota, dizzy cap, and coil cleaned and checked the spark plugs, tried
>different leads, checked firing order, and even swaped my points dizzy back
>in but it is still there. The timing is set to 14deg adv as per factory
>manual. I rotated the engine to tdc to check that the rota button is
>firing
>no1 at the right time as far as i can tell it is.
>I then checked the fuel system and found some material blocking the rear
>carby, i believe this was caused by a tank of optimax i used and it
>dislodged some salastic(which i stupidly used where i should not have yrs
>ago oops) This lead me to suspect a lean out causing engine damage so i
>had
>a compresion test done with the folowing results (#1)131psi (#2)140psi
>(#3)125psi (#4)130psi so this makes me doubt that theory as tey are all
>fairly close to one another. The car has a very butchered wiring loom so i
>started to suspect it next so i disconected the loom from the starter and
>coil and ran my own wires from the battery to the coil and jumped the
>starter but the miss is still present so its got me beat. There is no oil
>in
>water, water in oil and the exhaust is not smokey, could it be a dead
>valve?
>Can anyone think of something else that could be as im becoming desperate
>ive spent a lot of time chasin this for no joy.
>
>Thanx in advance........Tod
>
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