Re: 95 corolla stumbles

"Stef Caunter" <stef@caunter.ca> wrote in message
news:Pine.BSF.4.64.0702270931110.8676@tj.pnhagre.pn...[color=blue]
> New to me 4a-fe, 95 corolla manual, stumbled a bit under load in pretty
> wet slushy conditions yesterday, otherwise fine.
>
> The usual suspects would be plug wires, cap and rotor. I don't have a
> Haynes yet, and my experience is limited to carbureted Volvo motors; does
> this motor have a serviceable cap and rotor?
>
> The fact this was under load might point to vacuum I suppose. Is there a
> usual diagnosis for this? I just don't know all the fixes yet.
>
> I've read up on these motors, and apparently they use oil (PO said it was
> consuming oil). None is being obviously burned so I suppose it is getting
> by the rings.
>
> -Stefan
> (95 Corolla 4a-fe 5 speed, power nothing)[/color]


I am pretty sure that the 4A-FE motor has a serviceable cap and rotor. Some
aftermarket ignition parts can cause the symptoms you are describing, and
rather than experiment with which ones work and do not work, your best bet
is to stick to OEM (Denso) cap, rotor, and wires and Denso or NGK plugs.

A vacuum leak would probably cause the same symptoms regardless of road
conditions, and since the problem appears to be related to wet conditions,
I'd start by looking at ignition parts.
--

Ray O
(correct punctuation to reply)

"Ray O" <rokigawaATtristarassociatesDOTcom> wrote in message
news:5054c$45e46c0e$44a4a10d$26091@msgid.meganewsservers.com...[color=blue]
>
> "Stef Caunter" <stef@caunter.ca> wrote in message
> news:Pine.BSF.4.64.0702270931110.8676@tj.pnhagre.pn...[color=green]
>> New to me 4a-fe, 95 corolla manual, stumbled a bit under load in pretty
>> wet slushy conditions yesterday, otherwise fine.
>>
>> The usual suspects would be plug wires, cap and rotor. I don't have a
>> Haynes yet, and my experience is limited to carbureted Volvo motors; does
>> this motor have a serviceable cap and rotor?
>>
>> The fact this was under load might point to vacuum I suppose. Is there a
>> usual diagnosis for this? I just don't know all the fixes yet.
>>
>> I've read up on these motors, and apparently they use oil (PO said it was
>> consuming oil). None is being obviously burned so I suppose it is getting
>> by the rings.
>>
>> -Stefan
>> (95 Corolla 4a-fe 5 speed, power nothing)[/color]
>
>
> I am pretty sure that the 4A-FE motor has a serviceable cap and rotor.
> Some aftermarket ignition parts can cause the symptoms you are describing,
> and rather than experiment with which ones work and do not work, your best
> bet is to stick to OEM (Denso) cap, rotor, and wires and Denso or NGK
> plugs.
>
> A vacuum leak would probably cause the same symptoms regardless of road
> conditions, and since the problem appears to be related to wet conditions,
> I'd start by looking at ignition parts.
> --
>
> Ray O
> (correct punctuation to reply)
>[/color]

Yes, it does.

FWIW, I have always used aftermarket ignition parts on my 4A-FE with no
problem at all.