very high idle afr after rebuild was 10.1 now 14.3????
#1
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very high idle afr after rebuild was 10.1 now 14.3????
hi there guys n girls need a little hand
rebuilt my s5 fc vert engine, standard spec, std ecu turbo etc started it up and its idling around 14.3 , ive checked it all over and can find no fault of my work ( obviously iv done something wrong lol) before the rebuild it was idling at 10.1 thats a big difference and way to week
is there any thing i can check that i may hav got wrong
cheers for any help
rebuilt my s5 fc vert engine, standard spec, std ecu turbo etc started it up and its idling around 14.3 , ive checked it all over and can find no fault of my work ( obviously iv done something wrong lol) before the rebuild it was idling at 10.1 thats a big difference and way to week
is there any thing i can check that i may hav got wrong
cheers for any help
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Sounds like the engine is operating as it should.
Prior to the rebuild, idling at 10.1 is way, way to rich and indicates there was a problem.
Perhaps you didn't have the ACV hooked up previously and now with it functioning, the air pump is directing air into the exhaust ports as it should.
Prior to the rebuild, idling at 10.1 is way, way to rich and indicates there was a problem.
Perhaps you didn't have the ACV hooked up previously and now with it functioning, the air pump is directing air into the exhaust ports as it should.
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thanks for the reply
really? i thort 14 . 3 afr on idle was really high is that what it should be stock????
i forgot to mention the only non standard thing is the air pump has been removed and the egr or what eva the large bit is on the side of the lim has been blanked with a large plate but this was the same prior to the rebuild
also the map sensor is it best to go direct to the inlet?
really? i thort 14 . 3 afr on idle was really high is that what it should be stock????
i forgot to mention the only non standard thing is the air pump has been removed and the egr or what eva the large bit is on the side of the lim has been blanked with a large plate but this was the same prior to the rebuild
also the map sensor is it best to go direct to the inlet?
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If that engine was sucking fuel at 10.1 On idle..It wasn't running right then.
Most Turbo cars see those numbers on BOOST.
at 14.7 you are GOLDEN..leave it alone if the idle is set to your liking(rpm wise).
You want to see the Numbers walk away when the car gets revved and in Boost..(like 11 or so in boost).That is when the car needs fuel.
It doesn't need that much fuel at idle..so 10.1 AFR is just feeding the engine fuel is does not need.
Most Turbo cars see those numbers on BOOST.
at 14.7 you are GOLDEN..leave it alone if the idle is set to your liking(rpm wise).
You want to see the Numbers walk away when the car gets revved and in Boost..(like 11 or so in boost).That is when the car needs fuel.
It doesn't need that much fuel at idle..so 10.1 AFR is just feeding the engine fuel is does not need.
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S5's do not have the variable resistor. That's an S4 only deal. As others have stated, yours sounds good. If you have the airpump still and you're running 14.3, you're living the dream. As long as it isn't stumbling, idle is good and you're not stalling out sounds like your engine is running wel;.
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yea I mean the engine setup it came with was wel not the best the engine died due to det and threw a tip
can any any1 confirm the factory afrs at a certain rpm so I can replicate rpm and hopefully afrs to be happy?
can any any1 confirm the factory afrs at a certain rpm so I can replicate rpm and hopefully afrs to be happy?
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and no I don't the air pump connect nor the acv
any one hav a vacuum diagram of how to rig it up withought the acv in place
did a search but no good accurate diagrams
cheers
any one hav a vacuum diagram of how to rig it up withought the acv in place
did a search but no good accurate diagrams
cheers
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idle 16's (the air pump air is injected BEFORE the o2 sensor)
1200-3500 rpm cruise, it should be hovering around 14.7.
3500+ and WOT, it should start around 12:1 and get richer as the rpms go up.
with NO airpump.
idle: you'd be lucky to see 12:1, probably richer
1200-3500, it should hover around 14.7
3500+ and WOT, same as above, 12:1 and then get richer
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ok thank you for the replys im going to whip the uim off and check everything over as it now jumps to 16s now and then
and when i connect the map sensor direct to inlet it idles at 17
grrrrrrrrrrrrr
and when i connect the map sensor direct to inlet it idles at 17
grrrrrrrrrrrrr
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