Hey Andrew,
After reading your Email an idea struck me. If the engine is
idling Ok but is suffering under load, and you think it's not fuel pressure
or ignition, then maybie you should check the air flow meter operation. If
it's not well, then the ECU won't be able to determine the correct amount of
fueling required under load. If you can get your hands on a oxygen sensor
bar graph meter, (Jaycar Electronics are selling them in kit form for around
$60 - good value!) so that you can determine whether or not fueling is
running too lean. Also check you oxy sensor by putting a multimeter across
it and ground making sure its output voltage is between 0(lean) and 1(rich)
volt. Do you know what type of air flow meter you have? Is it a thermo
resistive type, or flap type? Either of these can be prone to aging where
the heater in the thermo resistive may be damaged or the potentiometer in
the flap type my be worn.(just a couple of possibilities) You can put a
multimeter on the output pin of the airflow meter and see if the output
voltage varies with respect to airflow.(usually between 0 and 5
Volts.....but I'm not sure of the Z18 type)
Good luck!!
George
----- Original Message -----
From: Mark Ward <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, October 30, 2000 1:16 PM
Subject: Re: help, engine trouble
> If it's backfiring sounds like it's running lean ?
> Wardy
> ----- Original Message -----
> From: "Andrew Peters" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Monday, October 30, 2000 1:12 PM
> Subject: Re: help, engine trouble
>
>
> > yeah ive tried different coil and lead combos, its also backfining into
> the
> > intake, but i havent changed cam timing?
> > -----Original Message-----
> > From: Paddy McMillan <[EMAIL PROTECTED]>
> > To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
> > Date: Sunday, 29 October 2000 1:36
> > Subject: Re: help, engine trouble
> >
> >
> > > did you try a different coil or coil lead? usually its electrical
if
> > >things only breakdown under load and not at idle and when revved
freely.
> > >Paddy
> > >new parts arent guaranteed to work, theyre guaranteed to be replaced if
> > they
> > >dont!
> > >
> > >----- Original Message -----
> > >From: Terry Rudd <[EMAIL PROTECTED]>
> > >To: <[EMAIL PROTECTED]>
> > >Sent: Saturday, October 28, 2000 10:30 PM
> > >Subject: RE: help, engine trouble
> > >
> > >
> > >> Very little change of it being the injectors, you expect a 3 cylinder
> run
> > >> with a shot injector but not a total breakdown. If you have good fuel
> > >> pressure and good spark (hook up a timing light to be sure) then you
> have
> > >to
> > >> dig a bit deeper for the problem.
> > >>
> > >> Terry
> > >> -----Original Message-----
> > >> From: [EMAIL PROTECTED]
> > >> [mailto:[EMAIL PROTECTED]]On Behalf Of Andrew
Peters
> > >> Sent: Saturday, 28 October 2000 6:16 PM
> > >> To: [EMAIL PROTECTED]
> > >> Subject: Re: help, engine trouble
> > >>
> > >>
> > >> yeah, there was pressure there last week, the low pressue filter it
> > >> visually pretty clean and ide say the hp one would be too as theyre
> both
> > >> new, so any shit would be cought in the lp one. if nothing else turns
> up
> > >ill
> > >> pull the rail off and test it again.
> > >> any chance its the injectors?
> > >> -----Original Message-----
> > >> From: Terry Rudd <[EMAIL PROTECTED]>
> > >> To: [EMAIL PROTECTED]
<[EMAIL PROTECTED]>
> > >> Date: Saturday, 28 October 2000 15:18
> > >> Subject: RE: help, engine trouble
> > >>
> > >>
> > >> Andrew,
> > >> You seemed to have concentrated on electrical items, have you
> checked
> > >> fuel pressure? It could be something as simple as a blocked filter.
> > >>
> > >> Terry
> > >> -----Original Message-----
> > >> From: [EMAIL PROTECTED]
> > >> [mailto:[EMAIL PROTECTED]]On Behalf Of Andrew
Peters
> > >> Sent: Saturday, 28 October 2000 2:46 PM
> > >> To: [EMAIL PROTECTED]
> > >> Subject: help, engine trouble
> > >>
> > >>
> > >> hi all, im having problems with my z18et, its been off the road
> for
> > >> ages and i didnt pull it apart at all. the problem is it will idle
but
> > >with
> > >> any load above about 2k it just dies and splutters, reving in neutral
> > wwas
> > >> ok and all seemed good until i drove it, now after playing with
timing
> > and
> > >> computers it wont even do that cleanly. i changed the injectors while
> it
> > >was
> > >> out of the car and rewired everything, pulled the throttle body off
and
> > >> thats it. another thing i noticed was the boost line isnt connected
so
> > >there
> > >> is an air leak, and if you block it up the motor dies, if its idleing
> or
> > >> revving. ive tried ign timing everywhere from 5-30 with no real
> > difference
> > >> in problem, also tried using a tuned computer and that made no
> difference
> > >> aswell.
> > >> im way out of ideas, any input at all would be helpfull, even
> > little
> > >> things that i may have over looked
> > >> cheers
> > >> andrew
> > >>
> > >> sorry so long
> > >>
> >
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