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Rb20Det Backfiring And Wont Rev

_andrew_
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_andrew_ Newbie

_andrew_

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hey im hoping somone on here can help me. I have a rb20det i have had sitting for a year or so now ive finally decided to get it going. It is hard to start sounds like it wants to fire but wont and when it does it just coughs and splutters . the only way to rev it is tapping the accelerator on and off lightly or it will backfire and die. When trying to rev it studders and has crazy backfires it alsowont rev higher than 2500 if you can manage to get it that farwhich i think is limp mode. I beleive its running rich as it fouls the injectors and blows black smoke

can anyone help or have any ideas cheers

Edited by _andrew_
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Tonks Community Regular

Tonks

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If it won't rev past 2500rpm i'd say the AFM's dead.

Have you changed plugs, fuel filter & fresh batch of fuel if its been sitting for a year? Oil too for that matter? Give it a good service before trying to get it going after a year.

_andrew_ Newbie

_andrew_

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now it wont start at all cleaned the plugs that were fouled up

its getting fuel and spark

and i have installed new plugs new fuel , ic piping is all good

and yeah i think the afm is stuffed but it should run alright with the afm unplugged upto 2500

il try new fuel filter, afm and clean the aac valve would it run with no aac vavle(aac unplugged)

Edited by _andrew_
Tonks Community Regular

Tonks

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Posted

Have a look at the air regulator too under your throttle body that would be fair average I reckon have a look for the diy clean on here somewhere.

I'd deff be leaning to the AFM's rooted and I wouldn't be running it without the AFM.

With the AFM unplugged then it would definitely be reading zero airflow?

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