Idle fault

Phil-b4

New member
Hi I have a problem with my legacy b4 00. Basically when she warms up she idles funny. It sounds like it's going to cut out but the revs just jump back to normal and then it will do the same. I done a full service and it didn't do any thing. I took the inter cooler out and had a look for any air pipes that were cracked or any thing and couldn't find any thing. Cleaned out the trottle body as well. It drives perfect other than that. If any one can shed any light or has come across this please help

Thanks. Phil
 
Did you check the code by plugging the 2 black connectors under the dash. Sounds like a mar sensor, code 23
 
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