new member. rb25det stoped running at random

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huntsmcgee
Posts: 2
Joined: Fri Dec 14, 2012 8:29 pm
Car: 1990 240sx rb25 s2 swap

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First of let me say hi and i come with a problem. I just bought a 240 with a s2 rb25 swap and it ran great aside from it having an idel issue from 900rpms to 1900. Today i went out to eat ran fine drove it home and let it idel for anout 2 mins and it suddenly started bogging and running 10afr and under i have a power fc and the tune was great. The problem now is its rich at idel and as soon as boost trys to xome in it dies. No boost leak i do have a exhaust leak at the manifold but it ran like that. Maybe bad maf what mv shouls my power fc see at idel


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elwesso
Posts: 30810
Joined: Sun Feb 23, 2003 4:52 pm
Car: 94 Infiniti Q45t 5 spd
2007 BMW M Coupe
2007 Infiniti G35 S 6MT
Location: Indiana
Contact:

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Welcome to NICO..

First thing that came to my mind was the MAF.. Somtimes MAF can short causing it to run really rich.. I've seen that on old Q45s, same sort of idea as the RB's.

huntsmcgee
Posts: 2
Joined: Fri Dec 14, 2012 8:29 pm
Car: 1990 240sx rb25 s2 swap

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Thanks for the replay i fix the issue after taking a maf out of a i35? any way my powerfc was to blame i some how set it to another type of intake. It has options for standard, power intake, and some othere non sense.


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