Cold start super rich!!!! 3bar SD
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From: South of Augusta,GA
Cold start super rich!!!! 3bar SD If you start the car in the mornings when its 50 or colder I idle low for 5 second, and then shut down from being rich, then If I press the throttle a little it starts but its so rich blue smoke covers the car until it gets warm. Car has 80lb injectors. HP tuners!
Thread Starter
TECH Fanatic
Joined: Jan 2010
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From: South of Augusta,GA
Thread Starter
TECH Fanatic
Joined: Jan 2010
Posts: 1,343
Likes: 2
From: South of Augusta,GA
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You are commanding 13.61 AFR which is too lean for startup, OLFA is not the problem.
There is no wideband signal, so no way to know if it's rich or lean.
If your datalog is correct, then something is wrong because there are injector duty spikes of more than 400% at idle and the engine is seeing high loads at low RPM. At idle the cylinder airmass should be like 0.20, but you are in WOT areas so the PCM will enrich the mixture.
The MAP readings are strange, too little vacuum (which may be caused by the engine running poorly or bad MAP settings), the timing advance seems high for idle too.
Fuel pressure and injector settings must be checked.
Not much can be advised without taking a look at the tune
There is no wideband signal, so no way to know if it's rich or lean.
If your datalog is correct, then something is wrong because there are injector duty spikes of more than 400% at idle and the engine is seeing high loads at low RPM. At idle the cylinder airmass should be like 0.20, but you are in WOT areas so the PCM will enrich the mixture.
The MAP readings are strange, too little vacuum (which may be caused by the engine running poorly or bad MAP settings), the timing advance seems high for idle too.
Fuel pressure and injector settings must be checked.
Not much can be advised without taking a look at the tune
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TECH Fanatic
Joined: Jan 2010
Posts: 1,343
Likes: 2
From: South of Augusta,GA
You are commanding 13.61 AFR which is too lean for startup, OLFA is not the problem.
There is no wideband signal, so no way to know if it's rich or lean.
If your datalog is correct, then something is wrong because there are injector duty spikes of more than 400% at idle and the engine is seeing high loads at low RPM. At idle the cylinder airmass should be like 0.20, but you are in WOT areas so the PCM will enrich the mixture.
The MAP readings are strange, too little vacuum (which may be caused by the engine running poorly or bad MAP settings), the timing advance seems high for idle too.
Fuel pressure and injector settings must be checked.
Not much can be advised without taking a look at the tune
There is no wideband signal, so no way to know if it's rich or lean.
If your datalog is correct, then something is wrong because there are injector duty spikes of more than 400% at idle and the engine is seeing high loads at low RPM. At idle the cylinder airmass should be like 0.20, but you are in WOT areas so the PCM will enrich the mixture.
The MAP readings are strange, too little vacuum (which may be caused by the engine running poorly or bad MAP settings), the timing advance seems high for idle too.
Fuel pressure and injector settings must be checked.
Not much can be advised without taking a look at the tune
There are a lot of issues with that tune.
For starters return the timing tables to stock, you are commanding a lot of timing at idle and high load-low rpm areas with no reason. Only test to see if the idle and startup improves, don't go WOT. I'm sure you will see a lot of improvement with stock timing tables
Also, the idle airflow tables have a lot of air, return them to stock (Base idle airflow and startup idle initial)
For starters return the timing tables to stock, you are commanding a lot of timing at idle and high load-low rpm areas with no reason. Only test to see if the idle and startup improves, don't go WOT. I'm sure you will see a lot of improvement with stock timing tables
Also, the idle airflow tables have a lot of air, return them to stock (Base idle airflow and startup idle initial)
Thread Starter
TECH Fanatic
Joined: Jan 2010
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From: South of Augusta,GA
The car has a fairly large cam, so It wont idle with the air in the stock tune. I added timing also to help the cam. I try not to go to WOT when starting car, but I do that to get it running.
Cammed engines need more timing to idle properly, but a lot of timing isn't good
Thread Starter
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From: South of Augusta,GA
Yes, but you don't need to give it 4-6 times more air. For idle airflow you need to add 5-10% at a time until it idles good. Adding 4 times the airflow will result in poor idle, surging and a lot of problems.
Cammed engines need more timing to idle properly, but a lot of timing isn't good
Cammed engines need more timing to idle properly, but a lot of timing isn't good
