Rpm fault and lambda?

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norm_str
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Rpm fault and lambda?

Post by norm_str »

Hi, sometimes when you start car up it jumps up to 2000rpm for like 2 second and then goes back down and idles at 900-950 rpm, does anybody had same problem?? And once in 3weeks it has fault 'system to lean bank 1' I have put new lambda sensor on but still come on??? Any advice?? Thanks
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alexperkins
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Re: Rpm fault and lambda?

Post by alexperkins »

Which lambda sensor did you replace - pre or post cat?

You might want to look into replacing the coolant temperature sensor as this can cause behaviour like this.
norm_str
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Re: Rpm fault and lambda?

Post by norm_str »

I replaced first lambda, and I did replace coolant temp sensor but still does same!
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alexperkins
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Re: Rpm fault and lambda?

Post by alexperkins »

Have you cleaned the throttle body and done a throttle body alignment?
norm_str
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Re: Rpm fault and lambda?

Post by norm_str »

Yh I have done it before, but I didn't do it after I change lambda and temp sensor. I will try to clean throttle body tomorrow and reset it, thanks for help mate :D
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alexperkins
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Re: Rpm fault and lambda?

Post by alexperkins »

Also check the vacuum hose between the brake servo and the tb hasn’t split. This can cause some odd behaviour
norm_str
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Re: Rpm fault and lambda?

Post by norm_str »

alexperkins wrote: Thu Jan 04, 2018 11:46 pm Also check the vacuum hose between the brake servo and the tb hasn’t split. This can cause some odd behaviour
i will do thanks mate,i just have another question , do you know if 1.4 8v throttle body will do on 1.0 8v?
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alexperkins
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Re: Rpm fault and lambda?

Post by alexperkins »

It’ll let too much air in as it’s a larger diameter. 1.0 needs a 1.0 TB
norm_str
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Re: Rpm fault and lambda?

Post by norm_str »

alexperkins wrote: Mon Jan 29, 2018 9:38 pm It’ll let too much air in as it’s a larger diameter. 1.0 needs a 1.0 TB
alright will have to leave a 1.0 one, thanks 8)
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