Jerks while driving

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Mar 14, 2005 | 11:21 AM

Bvarghese

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Jerks while driving

the car jerks frequently while driving and misses quite a bit. the mechanic says that it is a result of an faulty injector.

I'd understand if this is the cause of the engine missing, can it be the casue of the jerking as well?

i have recently changed the sparks with bosch +4s

1996 Audi A8Q

Mar 14, 2005 | 11:28 AM

PaulW

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From: Wilbur by the Sea

If it's missing you would have a fault code

And a check engine light if you had a US bound car.....but Euro spec cars don't.....is there a CAT light on?

Mar 14, 2005 | 11:32 AM

Bvarghese

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Re: If it's missing you would have a fault code

none of the warning lights are on..alothg the car shakes after brief intervals and especially while idling

Mar 14, 2005 | 11:40 AM

PaulW

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From: Wilbur by the Sea

You need to vag-com it and see what comes up

Mar 14, 2005 | 11:44 AM

Bvarghese

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got the software...but

i just got the sotware... now i need the connector...

any normal seriosl connector wiht an OBDII end should work right?

Mar 14, 2005 | 11:56 AM

PaulW

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From: Wilbur by the Sea

Can't help you with that....I would get a ross-tech cable myself

If you're going to use their software, it requires one of their cables for the newer versions to do everything.....or so I understand.

It will pay for itself many, many times over.

And you'll only have to do it once. Sounds like you have a problem that you need to solve.

Mar 14, 2005 | 01:02 PM

Acceler8

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you need to check the OBDII

Another possibility could be your air flow. a warning light might or might not come on if your exhaust isnt doing its job appropriately. Your ECU might be overcompensating for something. I had no warnings come on in my cruiser, but its not as sophisticated as the OBDII. Recently, on my landcruiser, i ran into a problem with my exhaust. The car would shudder ocasionally, it felt like the car was choking. Turns out that the whole system needed replaced. Most of it was blocked with sediment.(Think about the explanation of a heart attack) I would assume that you would get a rich mixture reading on the OBDII if the exhaust is not flowing well.
hope this helps.