'86 Camry stumble/hesitation, help?

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Old 12 Dec 2004, 04:44 am   #1 (permalink)
Tim J.
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Default '86 Camry stumble/hesitation, help?

'86 Camry, manual, 233K

I'm having a problem when coming off of idle/letting out the clutch to take
off where the engine stumbles very badly. If I don't depress the clutch
several times and give it gas while getting the car up to speed, the engine
may die. The stumbling causes front end to shake pretty badly until the car
is crusing.

The engine doesn't noticeably hesitate or miss once up to speed. In fact,
the car drives and accelerates best when on the freeway. The engine will
rev without missing or doing anything unusual at a standstill. Also doesn't
matter whether it is cold or hot (ambient or engine), though it is much
worse when cold.

My brother and I recently checked the timing, pulled the plugs, cap, and
wires, all seem acceptable. Cap, rotor, and wires are pretty new. Fuel
filter was also replaced with timing belt about 25K ago. We even cleaned
the coil of carbon deposits as I have heard this can be a problem with the
IIA.

The problem has been getting slowly but progressively worse, perhaps really
bad the last 1K or so.

I'm going to have access to my friend's workshop in about a week. Any hints
as to where I should look first with this problem?

Any advice greatly appreciated!

T.J.


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Old 12 Dec 2004, 09:52 am   #2 (permalink)
Supra Man
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Default Re: '86 Camry stumble/hesitation, help?

On Sun, 12 Dec 2004 02:44:52 -0800, Tim J. wrote:

> '86 Camry, manual, 233K
>
> I'm having a problem when coming off of idle/letting out the clutch to take
> off where the engine stumbles very badly. If I don't depress the clutch
> several times and give it gas while getting the car up to speed, the engine
> may die. The stumbling causes front end to shake pretty badly until the car
> is crusing.
>
> The engine doesn't noticeably hesitate or miss once up to speed. In fact,
> the car drives and accelerates best when on the freeway. The engine will
> rev without missing or doing anything unusual at a standstill. Also doesn't
> matter whether it is cold or hot (ambient or engine), though it is much
> worse when cold.
>
> My brother and I recently checked the timing, pulled the plugs, cap, and
> wires, all seem acceptable. Cap, rotor, and wires are pretty new. Fuel
> filter was also replaced with timing belt about 25K ago. We even cleaned
> the coil of carbon deposits as I have heard this can be a problem with the
> IIA.
>
> The problem has been getting slowly but progressively worse, perhaps really
> bad the last 1K or so.
>
> I'm going to have access to my friend's workshop in about a week. Any hints
> as to where I should look first with this problem?
>
> Any advice greatly appreciated!
>
> T.J.


When I had this problem it turned out there was a slit I didn't see in the
bottom of the air tube, running from the air filter to the intake plenum.
The extra air flow doesn't get measure by the MAF sensor and causes
problems. Of, it could be the MAF itself is gonzo and needs replacing
($135-165, either aftermarket or from Toyota).

Also, take a look around for a loose/plugged/missing vacuum line...
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Old 12 Dec 2004, 05:35 pm   #3 (permalink)
Tim J.
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Default Re: '86 Camry stumble/hesitation, help?

Thanks for the advice Supra Man! Will check it out...

T.J.

> When I had this problem it turned out there was a slit I didn't see in the
> bottom of the air tube, running from the air filter to the intake plenum.
> The extra air flow doesn't get measure by the MAF sensor and causes
> problems. Of, it could be the MAF itself is gonzo and needs replacing
> ($135-165, either aftermarket or from Toyota).
>
> Also, take a look around for a loose/plugged/missing vacuum line...




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Old 12 Dec 2004, 05:47 pm   #4 (permalink)
HachiRoku
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Default Re: '86 Camry stumble/hesitation, help?

On Sun, 12 Dec 2004 15:35:14 -0800, Tim J. wrote:

> Thanks for the advice Supra Man! Will check it out...

'Welcome. I try!

>
> T.J.
>
>> When I had this problem it turned out there was a slit I didn't see in the
>> bottom of the air tube, running from the air filter to the intake plenum.
>> The extra air flow doesn't get measure by the MAF sensor and causes
>> problems. Of, it could be the MAF itself is gonzo and needs replacing
>> ($135-165, either aftermarket or from Toyota).
>>
>> Also, take a look around for a loose/plugged/missing vacuum line...


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Old 13 Dec 2004, 07:02 pm   #5 (permalink)
toyotawiz
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Default Re: '86 Camry stumble/hesitation, help?

make sure the snorkle intake tube isnt broken or cracked. thats the most
common cause of that complaint

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Old 15 Dec 2004, 01:47 am   #6 (permalink)
Tim J.
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Default Re: '86 Camry stumble/hesitation, help?

Thanks for the advice toyotawiz!

"toyotawiz" <brian_updyke@yahoo.com> wrote in message
news:11cac0895e8bfef5ef063b98738b242a@localhost.ta lkaboutautos.com...
> make sure the snorkle intake tube isnt broken or cracked. thats the most
> common cause of that complaint
>



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Old 16 Feb 2005, 12:40 am   #7 (permalink)
Tim J.
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Default Re: '86 Camry stumble/hesitation, help?

Hey HachiRoku,

This was *exactly* the problem (cracks in the intake "snorkel" after the MAF
and before the throttle body.) Nobody saw 'em on a casual inspection and the
whole assembly looked mint. Luckily, I have a mechanic friend with some
spare time who took it to his shop and ran the "smoke test" on the intake --
and sure enough, smoke was pouring out. He put in a good used part to
replace the old one and it works like it once did for a pretty good price.
Thanks for the great advice!

Now, can anybody tell me what the approximate parts and labor would be on
replacing the worn control arms on this rig? (86 Camry)

Thanks!

T.J.


"HachiRoku" <Trueno@ae86.GTS> wrote in message
news:AM4vd.1390$ag6.462@trndny07...
> On Sun, 12 Dec 2004 15:35:14 -0800, Tim J. wrote:
>
>> Thanks for the advice Supra Man! Will check it out...

> 'Welcome. I try!
>
>>
>> T.J.
>>
>>> When I had this problem it turned out there was a slit I didn't see in
>>> the
>>> bottom of the air tube, running from the air filter to the intake
>>> plenum.
>>> The extra air flow doesn't get measure by the MAF sensor and causes
>>> problems. Of, it could be the MAF itself is gonzo and needs replacing
>>> ($135-165, either aftermarket or from Toyota).
>>>
>>> Also, take a look around for a loose/plugged/missing vacuum line...

>



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