86 Camry loss of power under load

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Old 23 Jun 2003, 06:43 pm   #1 (permalink)
Tony Marsillo
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Default 86 Camry loss of power under load

I have had this 1986 Camry since it was new. It is a 4 cylinder gas engine
with 136K miles. The problem started about 6 to 8 years ago. When trying to
get on the highway, especially if there are a few passengers, if I try to
accelerate hard the car will go, then it will lose power at about 50 mph no
matter how much gas I give it. The can will sometimes stall. If I pull over
the car will start right up and will not do it again for the rest of the
trip. The problem does not always happen, if fact most times it does not. It
seems to happen just as the can reaches operating temp judging from the temp
gauge. I have done regular maintenance, change oil and filters every 3 to 5K
miles, tune-ups, and compression test. It is related to heavy engine load,
like it is running out of gas. I have changed the following parts over the
years with out a change:

Fuel filter
Spark plugs
rotor
Distributor cap
Fuel pressure regulator
Air filter
Ignition coil
Ignition wires
Cleaned the throttle

Nothing has ever seemed to help. Any ideas.

--
Tony Marsillo
Nutmeg Repair
-----------------------------------------------------------------


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Old 24 Jun 2003, 03:22 pm   #2 (permalink)
Jason James
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Default Re: 86 Camry loss of power under load


"Tony Marsillo" <tonymar@optonline.net> wrote in message
news:bd83a1$pua82$1@ID-102725.news.dfncis.de...
> I have had this 1986 Camry since it was new. It is a 4 cylinder gas engine
> with 136K miles. The problem started about 6 to 8 years ago. When trying

to
> get on the highway, especially if there are a few passengers, if I try to
> accelerate hard the car will go, then it will lose power at about 50 mph

no
> matter how much gas I give it. The can will sometimes stall. If I pull

over
> the car will start right up and will not do it again for the rest of the
> trip. The problem does not always happen, if fact most times it does not.

It
> seems to happen just as the can reaches operating temp judging from the

temp
> gauge. I have done regular maintenance, change oil and filters every 3 to

5K
> miles, tune-ups, and compression test. It is related to heavy engine load,
> like it is running out of gas. I have changed the following parts over the
> years with out a change:
>
> Fuel filter
> Spark plugs
> rotor
> Distributor cap
> Fuel pressure regulator
> Air filter
> Ignition coil
> Ignition wires
> Cleaned the throttle
>
> Nothing has ever seemed to help. Any ideas.
>
> --
> Tony Marsillo


There maybe dirt.debris in the bottom of the petrol tank,...then when you
first take-off the debris moves and partially bolcks the petrol intake to
the pump. After you have stopped and re-started, the small amount of debris
caught at the pump inlet clears rearwards with the rest of the materal.

Just a thought,....Jason


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Old 25 Jun 2003, 09:07 am   #3 (permalink)
Daniel M. Dreifus
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Default Re: 86 Camry loss of power under load

"Tony Marsillo" <tonymar@optonline.net> wrote in message news:<bd83a1$pua82$1@ID-102725.news.dfncis.de>...
> I have had this 1986 Camry since it was new. It is a 4 cylinder gas engine
> with 136K miles. The problem started about 6 to 8 years ago. When trying to
> get on the highway, especially if there are a few passengers, if I try to
> accelerate hard the car will go, then it will lose power at about 50 mph no
> matter how much gas I give it.


Here's my guess:

Perhaps you've heard, people sometimes try to increase flow through
the exhaust system to improve power. Well, if your exhaust system is
plugged, the reverse can happen, and you will lose power.
Sometimes the catalytic converter can become plugged. I suspect this
by the way you describe the problem and hearing other similar
complaints solved.
The catalytic converter can be expensive. The correct test method
involves getting the right equipment and removing some parts in the
exhaust. A rough alternate method has been suggested, and I copied it
here. Basically, it is to connect a vacuum gauge to the intake
manifold, hold the engine at a mid rev range and see if the intake
vacuum begins to fall due to exhaust restriction.

You can also do a rough test using a hand-held vacuum gauge and
monitoring
intake manifold vacuum -- if the vacuum starts falling (i.e., intake
manifold
pressure is rising) at high rpm with a constant throttle opening, the
exhaust
is probably plugged up.
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Old 25 Jun 2003, 06:09 pm   #4 (permalink)
Tony Marsillo
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Default Re: 86 Camry loss of power under load

Jason, Thanks for the reply. I have thought of trying to connect a pressure
gauge to the fuel line and try to drive around so it can be monitored, but
this can does not offer a continent test port other than removing the cold
start injector and putting the pressure gauge there. It is a "banjo"?? type
connection that I have never found a fitting to mate to it.

Thanks

--
Tony Marsillo
Nutmeg Repair
-----------------------------------------------------------------
" Jason James" <stratosphere2@bigpond.com> wrote in message
news:r42Ka.828$p8.29896@newsfeeds.bigpond.com...
>
> "Tony Marsillo" <tonymar@optonline.net> wrote in message
> news:bd83a1$pua82$1@ID-102725.news.dfncis.de...
> > I have had this 1986 Camry since it was new. It is a 4 cylinder gas

engine
> > with 136K miles. The problem started about 6 to 8 years ago. When trying

> to
> > get on the highway, especially if there are a few passengers, if I try

to
> > accelerate hard the car will go, then it will lose power at about 50 mph

> no
> > matter how much gas I give it. The can will sometimes stall. If I pull

> over
> > the car will start right up and will not do it again for the rest of the
> > trip. The problem does not always happen, if fact most times it does

not.
> It
> > seems to happen just as the can reaches operating temp judging from the

> temp
> > gauge. I have done regular maintenance, change oil and filters every 3

to
> 5K
> > miles, tune-ups, and compression test. It is related to heavy engine

load,
> > like it is running out of gas. I have changed the following parts over

the
> > years with out a change:
> >
> > Fuel filter
> > Spark plugs
> > rotor
> > Distributor cap
> > Fuel pressure regulator
> > Air filter
> > Ignition coil
> > Ignition wires
> > Cleaned the throttle
> >
> > Nothing has ever seemed to help. Any ideas.
> >
> > --
> > Tony Marsillo

>
> There maybe dirt.debris in the bottom of the petrol tank,...then when you
> first take-off the debris moves and partially bolcks the petrol intake to
> the pump. After you have stopped and re-started, the small amount of

debris
> caught at the pump inlet clears rearwards with the rest of the materal.
>
> Just a thought,....Jason
>
>



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Old 26 Jun 2003, 02:59 am   #5 (permalink)
Jason James
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Default Re: 86 Camry loss of power under load


"Tony Marsillo" <tonymar@optonline.net> wrote in message
news:bdda2u$rcod0$1@ID-102725.news.dfncis.de...
> Jason, Thanks for the reply. I have thought of trying to connect a

pressure
> gauge to the fuel line and try to drive around so it can be monitored, but
> this can does not offer a continent test port other than removing the cold
> start injector and putting the pressure gauge there. It is a "banjo"??

type
> connection that I have never found a fitting to mate to it.
>
> Tony Marsillo
> Nutmeg Repair



Don't know Tony,...but it would be ideal. This type of problem once
persisted in a Valiant V8 my cousin had. It turned out to be a cracked inlet
manifold. The symptoms were reversed ie when the manifold heated up, the
crack opened admitting air, causing the engine to run rough and cutout.

I had a Hillman once that had a leaking headgasket. It would start OK, then
about 1/2 hour later would stall as the small amount of water leaked
directly onto the plug electrodes.

Hope you find it,....Jason



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Old 02 Jul 2003, 03:43 am   #6 (permalink)
E Legerstee
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Default Re: 86 Camry loss of power under load

HAD SAME PROBLEM!!
try to replace the sensor in you exhaust just before the catalysator.

E Legerstee
see my website at------------------> www.toyotacamry.tk

"Tony Marsillo" <tonymar@optonline.net> schreef in bericht
news:bd83a1$pua82$1@ID-102725.news.dfncis.de...
> I have had this 1986 Camry since it was new. It is a 4 cylinder gas engine
> with 136K miles. The problem started about 6 to 8 years ago. When trying

to
> get on the highway, especially if there are a few passengers, if I try to
> accelerate hard the car will go, then it will lose power at about 50 mph

no
> matter how much gas I give it. The can will sometimes stall. If I pull

over
> the car will start right up and will not do it again for the rest of the
> trip. The problem does not always happen, if fact most times it does not.

It
> seems to happen just as the can reaches operating temp judging from the

temp
> gauge. I have done regular maintenance, change oil and filters every 3 to

5K
> miles, tune-ups, and compression test. It is related to heavy engine load,
> like it is running out of gas. I have changed the following parts over the
> years with out a change:
>
> Fuel filter
> Spark plugs
> rotor
> Distributor cap
> Fuel pressure regulator
> Air filter
> Ignition coil
> Ignition wires
> Cleaned the throttle
>
> Nothing has ever seemed to help. Any ideas.
>
> --
> Tony Marsillo
> Nutmeg Repair
> -----------------------------------------------------------------
>
>



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