318 is e36 bogs down under acceleration

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daveck2@yahoo.com - 22 Aug 2006 23:53 GMT

I am still battling a problem with my 93 318is for about 10 months
now. It runs strong when cold but as it reaches normal operating temp,

it seems to bog down when the accelerator is applied medium to hard. I

have learned to back of the accelerator just a bit and the hesitation
goes away, as long as I apply the accelerator slowly thereafter. I
have checked and replaced all old or worn vacume hoses. I have sprayed

carb cleaner around hoses to identify leaks. I have good compression
and burn no oil. (plugs are all normal) I have taken the Idle air
control valve off and cleaned it. Replaced the TPS, Fuel pump, Air
flow meter, temp sensor. Could this be an injector problem, maybe one
sticking open? Any help would be appreciated, I don't want to get rid
of this car but I drive it a lot and can't spring for new wheels at
this time.

Thanks

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bm mech - 23 Aug 2006 15:58 GMT

>I am still battling a problem with my 93 318is for about 10 months
>now. It runs strong when cold but as it reaches normal operating temp,
[quoted text clipped - 14 lines]
>
>Thanks

you say you have replaced the fuel pump but did you replace the filter also
have you tried removing the injector rail as rust can accumulate in it .does
the eml light come on at all if a mixture problem occured its possible it may
.carb cleaner will not always show leaks up as the lambda sensor will adust
the mixture to compensate another possibillity is that the catalytic
converter may be blocking uprestricting the gas flow hence lack of
performance hope these lead you in the right direction

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Milev - 01 Sep 2006 23:08 GMT

> I am still battling a problem with my 93 318is for about 10 months
> now. It runs strong when cold but as it reaches normal operating temp,
[quoted text clipped - 14 lines]
>
> Thanks

I was having the same problem with my E46'99 318.

In my case I stopped putting ASDA petrol and switched to Shell optimax
for the last 3 months. The performance seems to be back and doesn't
stall when changing gear from 1st to 2nd.

I recommend you try better petrol for at least 6 full refills.

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