i46 throttle issue - Alfa Romeo Forum
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(Post Link) post #1 of 3 Old 03-09-07 Thread Starter
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Alfa 146

i46 throttle issue

Dear all,

I was wondering if someone could help with a problem I'm having. I am driving an alfa 146 1.4 t-spark. I'm experiencing an unusual throttle issue.

The car starts, idles and drives quite well under normal conditions. However, when cruising in 3rd, 4th and 5th gear, if I release pressure on the accelerator (say to slow down approaching a junction) the car starts to jerk violently. If I reapply pressure on the accelerator, it accelerates fine.

I've noticed a lot of talk about mass air flow filters and lambda sensors on this and other discussion boards. I'm really not sure what to do with it. I wonder would anyone have any suggestions? I don't want to have to bring it to a dealer yet cause it seems like something that could be straight forward?

Any help would be much appreciated.

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Re: i46 throttle issue

Does it jerk if you are driving along at a constant speed?
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Re: i46 throttle issue

Not a lot of help but I have the same problem, its like the car drops to idle revs too quickly and not smooth
also when in neutral if I try to hold revs at 3000rpm it won't hold steady, does yours do this also?

Replaced MAF and Lambda solved problem for a while then it came back. Nothing showed up on diagnostics either

I thinks its the stepper motor/throttle assembly, I will replace when I get the chance
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