89 Camry Challenging Electrical Problem

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Old 04 Mar 2004, 07:51 pm   #1 (permalink)
Andetal
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Default 89 Camry Challenging Electrical Problem

Our 89 Camry started running poor a few months back, particularly in hills
(under load?). Eventually ended up in a no start condition. Mechanic said it
was either igniter or distributor (coil). First replaced the
coil/distributor with wrecker parts. Ran okay for a month or two, then
started to happen again, but went to no start after a few days. Replaced the
coil/distributor a second time - worked for a month then same thing. I just
replaced coil again with a new Toyota coil and put in a replacement (used)
igniter and ecu. Car started, drove about 10 mins, seemed okay though
slightly rough running. Shut it off, then it wouldn't start. Since, I have
managed to start it when cold, but not after warm - no spark.
sometime when trying to start it, it won't fire until the ignition is turned
off - almost like it's trying to run backwards?
From what I can see, all sensors test out as normal. Something seems to
be getting fried in the electrical circuit (coil, signal generator, igniter,
or?) causing the coil to die, and it has now happened for 3 coils. I have
run out of ideas. I would take it to Toyota, but there isn't one around for
miles (and over a ferry). Could it be something to do with the
alternator/regulator, or a sensor, or? Any ideas would be appreciated.
Andrew


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Old 05 Mar 2004, 12:06 pm   #2 (permalink)
Jason James
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Default Re: 89 Camry Challenging Electrical Problem


"Andetal" <andetalremovethis@shaw.ca> wrote in message
news:B2R1c.671117$JQ1.93464@pd7tw1no...
> Our 89 Camry started running poor a few months back, particularly in hills
> (under load?). Eventually ended up in a no start condition. Mechanic said

it
> was either igniter or distributor (coil). First replaced the
> coil/distributor with wrecker parts. Ran okay for a month or two, then
> started to happen again, but went to no start after a few days. Replaced

the
> coil/distributor a second time - worked for a month then same thing. I

just
> replaced coil again with a new Toyota coil and put in a replacement (used)
> igniter and ecu. Car started, drove about 10 mins, seemed okay though
> slightly rough running. Shut it off, then it wouldn't start. Since, I have
> managed to start it when cold, but not after warm - no spark.
> sometime when trying to start it, it won't fire until the ignition is

turned
> off - almost like it's trying to run backwards?
> From what I can see, all sensors test out as normal. Something seems

to
> be getting fried in the electrical circuit (coil, signal generator,

igniter,
> or?) causing the coil to die, and it has now happened for 3 coils. I have
> run out of ideas. I would take it to Toyota, but there isn't one around

for
> miles (and over a ferry). Could it be something to do with the
> alternator/regulator, or a sensor, or? Any ideas would be appreciated.
> Andrew


Its often the case when tracing a fault, that we go off on a tangent. There
is also the possibility that there is more than one fault. I would check the
plug condition, and leads. Replace them if they are original. The
distributor cap cann also give these faults if it is carbon-tracked. Under
load the spark-gap reluctance increases (inside the combustion chamber). If
there is another easier (or lower resistance) path to ground, the spark will
take it. I had a faulty cap give simialr symptoms once. It took ages to suss
it out.

If you are convinced the plugs, leads and cap are OK, I would then put a
multimeter on volts range on the coil low-tension terminals when the engine
is in the ''ON'' state but not running. It maybe the volts are lower than
needed or marginal. Some igniters will stop working if the volts to them
drops below 10v. This can be caused by resistance in the supply
wiring/connectors to it. One test for this (apart from the mmeter) is to
switch on the headlights to high and the AC/heater-blower fan to high while
the engine is idling. If the engine dies, it is probable the supply volts to
the ignition is low.

Ignition timing should also be checked.

Jason


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Old 09 Feb 2006, 08:38 pm   #3 (permalink)
need2no
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Default Re: 89 Camry Challenging Electrical Problem

well it seems im not the only one having a driveability problem w\ a camry.
the one i have here is a 93 w\ the same stalling-under-load problem. after
changing the fuel filter (because i could also smell a "lean condition"
during this stalling process),i logged on to thi site & read one fellows
reply about checking the coil so i used my "spark tester" wich is
installed between the spark plug and the plug wire and lights up when ther
is spark present.eureka! as the motor started running poorly the spark got
very week but every couple of seconds or so it would get a hot spark and
run smooth for a second.so tomarrow i will price a new coil and hopefully
install it and let you know what happened. does anyone know about how much
a coil will cost for this thing?

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Old 10 Feb 2006, 12:30 pm   #4 (permalink)
davidj92
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Default Re: 89 Camry Challenging Electrical Problem

need2no wrote:
> well it seems im not the only one having a driveability problem w\ a
> camry. the one i have here is a 93 w\ the same stalling-under-load
> problem. after changing the fuel filter (because i could also smell a
> "lean condition" during this stalling process),i logged on to thi
> site & read one fellows reply about checking the coil so i used my
> "spark tester" wich is installed between the spark plug and the plug
> wire and lights up when ther is spark present.eureka! as the motor
> started running poorly the spark got very week but every couple of
> seconds or so it would get a hot spark and run smooth for a second.so
> tomarrow i will price a new coil and hopefully install it and let you
> know what happened. does anyone know about how much a coil will cost
> for this thing?


Not sure but this could be your problem. There have been posts in this ng
about the o-ring on the distributor shaft leaking, letting oil get into the
cap and since the coil is inside the cap it causes a short or crossfire.
After inspecting the inside of cap and coil for damage the fix is to clean
all surfaces with denatured or rubbing alcohol and cotton swabs or q-tips.
Make sure no cotton residue is left.
HTH, davidj92


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