There was no install. He has an 01. If you’re talking about the f22 swap then that’s an entirely different topic.

There is no perceivable difference between the two ecu other then some slight added responsiveness reported with the 02-03 ecu in closed loop, but once you run it on an f22 any comparison is void. Talking form experience, there is no difference running an ap1 ecu on an f22 vs an ap2 ecu, other then the extended rev limit. Driving impressions are identical to stock otherwise. It’s pretty cool actually.
[/quote]

haha i actually missed the fact that he has a 01.

ive been reading and people say its better to run a 00-01 ecu with a f22 appose from a 02-03 ecu
[/quote]

Its just a theory, a sound one, but one none the less. Reason being as stated earlier, the F22 consumes more fuel then the f20, and the 00-01 ecu runs richer then the 02-03, but all this fuss is based on the assumption that the 02-03 ecu runs leaner then the 04-05 ecu open loop map, which isn't founded. As I mentioned previously, if your running a bolt on f22 that may need more fuel as a result and you are running it on an 02-03 car, then get an adjustable fuel pressure regulator to dial up the fuel pressure a bit so your car runs optimum afr in open loop. closed loop the ecu will self adjust to the f22 as well as any higher fuel pressure, so that's not an issue. So basically, no matter what ecu rout you take, you can deliver the fuel you need for a bolt on f22 and stock injectors. No engine management needed or warranted to run properly.
[/quote]

Hey, this is potential great news for me from a $$$$ standpoint.

I've got an 03 with a F22 block. I track it a lot and I've been constantly warned that my car "probably" runs lean in WOT. I've been told I need to by an engine management system to fix this, but I've been resistant simply because I can't justify a $2000+ expense, especially if I have no plans to modify the engine for any more NA performance.

Then, I read about the AEM Fuel and Ignition Controller, which is far less expensive than an EMS, but still pretty damn expensive for just changing the fuel mixture.

Now, if I read you post correctly and understand it, an adjustable fuel pressure regulator, which is pretty inexpensive I believe, could solve my potential running lean issues, correct?

So, first step I presume is to dyno the car including measuring the AFR. If my particular car isn't running lean (I guess there is a lot of variation there), then I don't have to do anything.

If it is running lean, and from what I've read this usually will only occur in WOT (that's open loop, correct?), then a fuel pressure regulator will solve my problem inexpensively, correct?

 

There was no install. He has an 01. If you’re talking about the f22 swap then that’s an entirely different topic.

There is no perceivable difference between the two ecu other then some slight added responsiveness reported with the 02-03 ecu in closed loop, but once you run it on an f22 any comparison is void. Talking form experience, there is no difference running an ap1 ecu on an f22 vs an ap2 ecu, other then the extended rev limit. Driving impressions are identical to stock otherwise. It’s pretty cool actually.
[/quote]

haha i actually missed the fact that he has a 01.

ive been reading and people say its better to run a 00-01 ecu with a f22 appose from a 02-03 ecu
[/quote]

Its just a theory, a sound one, but one none the less. Reason being as stated earlier, the F22 consumes more fuel then the f20, and the 00-01 ecu runs richer then the 02-03, but all this fuss is based on the assumption that the 02-03 ecu runs leaner then the 04-05 ecu open loop map, which isn't founded. As I mentioned previously, if your running a bolt on f22 that may need more fuel as a result and you are running it on an 02-03 car, then get an adjustable fuel pressure regulator to dial up the fuel pressure a bit so your car runs optimum afr in open loop. closed loop the ecu will self adjust to the f22 as well as any higher fuel pressure, so that's not an issue. So basically, no matter what ecu rout you take, you can deliver the fuel you need for a bolt on f22 and stock injectors. No engine management needed or warranted to run properly.
[/quote]

Hey, this is potential great news for me from a $$ standpoint.

I've got an 03 with a F22 block. I track it a lot and I've been constantly warned that my car "probably" runs lean in WOT. I've been told I need to by an engine management system to fix this, but I've been resistant simply because I can't justify a $2000+ expense, especially if I have no plans to modify the engine for any more NA performance.

Then, I read about the AEM Fuel and Ignition Controller, which is far less expensive than an EMS, but still pretty damn expensive for just changing the fuel mixture.

Now, if I read you post correctly and understand it, an adjustable fuel pressure regulator, which is pretty inexpensive I believe, could solve my potential running lean issues, correct?

So, first step I presume is to dyno the car including measuring the AFR. If my particular car isn't running lean (I guess there is a lot of variation there), then I don't have to do anything.

If it is running lean, and from what I've read this usually will only occur in WOT (that's open loop, correct?), then a fuel pressure regulator will solve my problem inexpensively, correct?

 

There was no install. He has an 01. If you’re talking about the f22 swap then that’s an entirely different topic.

There is no perceivable difference between the two ecu other then some slight added responsiveness reported with the 02-03 ecu in closed loop, but once you run it on an f22 any comparison is void. Talking form experience, there is no difference running an ap1 ecu on an f22 vs an ap2 ecu, other then the extended rev limit. Driving impressions are identical to stock otherwise. It’s pretty cool actually.
[/quote]

haha i actually missed the fact that he has a 01.

ive been reading and people say its better to run a 00-01 ecu with a f22 appose from a 02-03 ecu
[/quote]

Its just a theory, a sound one, but one none the less. Reason being as stated earlier, the F22 consumes more fuel then the f20, and the 00-01 ecu runs richer then the 02-03, but all this fuss is based on the assumption that the 02-03 ecu runs leaner then the 04-05 ecu open loop map, which isn't founded. As I mentioned previously, if your running a bolt on f22 that may need more fuel as a result and you are running it on an 02-03 car, then get an adjustable fuel pressure regulator to dial up the fuel pressure a bit so your car runs optimum afr in open loop. closed loop the ecu will self adjust to the f22 as well as any higher fuel pressure, so that's not an issue. So basically, no matter what ecu rout you take, you can deliver the fuel you need for a bolt on f22 and stock injectors. No engine management needed or warranted to run properly.
[/quote]

Hey, this is potential great news for me from a $$ standpoint.

I've got an 03 with a F22 block. I track it a lot and I've been constantly warned that my car "probably" runs lean in WOT. I've been told I need to by an engine management system to fix this, but I've been resistant simply because I can't justify a $2000+ expense, especially if I have no plans to modify the engine for any more NA performance.

Then, I read about the AEM Fuel and Ignition Controller, which is far less expensive than an EMS, but still pretty damn expensive for just changing the fuel mixture.

Now, if I read you post correctly and understand it, an adjustable fuel pressure regulator, which is pretty inexpensive I believe, could solve my potential running lean issues, correct?

So, first step I presume is to dyno the car including measuring the AFR. If my particular car isn't running lean (I guess there is a lot of variation there), then I don't have to do anything.

If it is running lean, and from what I've read this usually will only occur in WOT (that's open loop, correct?), then a fuel pressure regulator will solve my problem inexpensively, correct?
[/quote]

You got it

 

There was no install. He has an 01. If you’re talking about the f22 swap then that’s an entirely different topic.

There is no perceivable difference between the two ecu other then some slight added responsiveness reported with the 02-03 ecu in closed loop, but once you run it on an f22 any comparison is void. Talking form experience, there is no difference running an ap1 ecu on an f22 vs an ap2 ecu, other then the extended rev limit. Driving impressions are identical to stock otherwise. It’s pretty cool actually.
[/quote]

haha i actually missed the fact that he has a 01.

ive been reading and people say its better to run a 00-01 ecu with a f22 appose from a 02-03 ecu
[/quote]

Its just a theory, a sound one, but one none the less. Reason being as stated earlier, the F22 consumes more fuel then the f20, and the 00-01 ecu runs richer then the 02-03, but all this fuss is based on the assumption that the 02-03 ecu runs leaner then the 04-05 ecu open loop map, which isn't founded. As I mentioned previously, if your running a bolt on f22 that may need more fuel as a result and you are running it on an 02-03 car, then get an adjustable fuel pressure regulator to dial up the fuel pressure a bit so your car runs optimum afr in open loop. closed loop the ecu will self adjust to the f22 as well as any higher fuel pressure, so that's not an issue. So basically, no matter what ecu rout you take, you can deliver the fuel you need for a bolt on f22 and stock injectors. No engine management needed or warranted to run properly.
[/quote]

Hey, this is potential great news for me from a $ standpoint.

I've got an 03 with a F22 block. I track it a lot and I've been constantly warned that my car "probably" runs lean in WOT. I've been told I need to by an engine management system to fix this, but I've been resistant simply because I can't justify a $2000+ expense, especially if I have no plans to modify the engine for any more NA performance.

Then, I read about the AEM Fuel and Ignition Controller, which is far less expensive than an EMS, but still pretty damn expensive for just changing the fuel mixture.

Now, if I read you post correctly and understand it, an adjustable fuel pressure regulator, which is pretty inexpensive I believe, could solve my potential running lean issues, correct?

So, first step I presume is to dyno the car including measuring the AFR. If my particular car isn't running lean (I guess there is a lot of variation there), then I don't have to do anything.

If it is running lean, and from what I've read this usually will only occur in WOT (that's open loop, correct?), then a fuel pressure regulator will solve my problem inexpensively, correct?
[/quote]

You got it
[/quote]

Awesome....do I have to tune the adj fuel press reg on a dyno? Or, since it will only make a diff at WOT, can I just sort of adjust it some set amount? Asking that since "tuning" it means another few hundred bucks.

Or...maybe not. Three dyno runs is about $80, and I could just increase it's setting each time to see what my AFR at WOT is each run, correct?

 

There was no install. He has an 01. If you’re talking about the f22 swap then that’s an entirely different topic.

There is no perceivable difference between the two ecu other then some slight added responsiveness reported with the 02-03 ecu in closed loop, but once you run it on an f22 any comparison is void. Talking form experience, there is no difference running an ap1 ecu on an f22 vs an ap2 ecu, other then the extended rev limit. Driving impressions are identical to stock otherwise. It’s pretty cool actually.
[/quote]

haha i actually missed the fact that he has a 01.

ive been reading and people say its better to run a 00-01 ecu with a f22 appose from a 02-03 ecu
[/quote]

Its just a theory, a sound one, but one none the less. Reason being as stated earlier, the F22 consumes more fuel then the f20, and the 00-01 ecu runs richer then the 02-03, but all this fuss is based on the assumption that the 02-03 ecu runs leaner then the 04-05 ecu open loop map, which isn't founded. As I mentioned previously, if your running a bolt on f22 that may need more fuel as a result and you are running it on an 02-03 car, then get an adjustable fuel pressure regulator to dial up the fuel pressure a bit so your car runs optimum afr in open loop. closed loop the ecu will self adjust to the f22 as well as any higher fuel pressure, so that's not an issue. So basically, no matter what ecu rout you take, you can deliver the fuel you need for a bolt on f22 and stock injectors. No engine management needed or warranted to run properly.
[/quote]

Hey, this is potential great news for me from a $ standpoint.

I've got an 03 with a F22 block. I track it a lot and I've been constantly warned that my car "probably" runs lean in WOT. I've been told I need to by an engine management system to fix this, but I've been resistant simply because I can't justify a $2000+ expense, especially if I have no plans to modify the engine for any more NA performance.

Then, I read about the AEM Fuel and Ignition Controller, which is far less expensive than an EMS, but still pretty damn expensive for just changing the fuel mixture.

Now, if I read you post correctly and understand it, an adjustable fuel pressure regulator, which is pretty inexpensive I believe, could solve my potential running lean issues, correct?

So, first step I presume is to dyno the car including measuring the AFR. If my particular car isn't running lean (I guess there is a lot of variation there), then I don't have to do anything.

If it is running lean, and from what I've read this usually will only occur in WOT (that's open loop, correct?), then a fuel pressure regulator will solve my problem inexpensively, correct?
[/quote]

You got it
[/quote]

Awesome....do I have to tune the adj fuel press reg on a dyno? Or, since it will only make a diff at WOT, can I just sort of adjust it some set amount? Asking that since "tuning" it means another few hundred bucks.

Or...maybe not. Three dyno runs is about $80, and I could just increase it's setting each time to see what my AFR at WOT is each run, correct?
[/quote]

Correct on the latter. That's what I would do, just increase the pressure on the 2nd and 3rd runs until you hit the desired afr. If you need a 4th maybe they will give it to you, since it would be totally ridiculous to pay for a tuning session for you to jump out between runs and turn a screw. They don't have to do anything for you.

If they were going to try and stick you with paying to an hour of tuning, id just tell them forget it and invest that money into setting your car up with a wideband and street tune it yourself. Honestly if you ever plan on doing any bolt on mods in the future, this is going to be worthwhile to have and actually more accurate then a tail pipe sniffer. At min the tailpipe sniffers read .5 leaner then actual so keep that in mind.

With all else the same, and the base oe pressure at 43.5psi. I don't imagine you would need any higher then 50psi.

 

Your beat bet. Raise fuel pressure a smidge. Get vtec controller and dyno tune car with it. U will be able to trim out fuel and get curve right while still lowering vtec engagement which will help a lot.

 

There's usually just a small difference in price between a "3 pull" price and the hourly rate. I'd just rent it for an hour, and do as many pulls as you need to get it right.

 

Rise from the dead!

I'm running completely lean I'm running so lean that I'm throwing a check engine ligh p170 @ p0171. Need help. F22 with oo 01 ecu running super lean it won't even run right

 

Just a bump to confirm this. I have an 02 with a F22 swap, and I run VERY lean on the stock ecu(low 14 afr at wot, 16ish during vtec kick). A fuel pressure bump, 65psi at wot, and a VAFC was completely required for both performance and safety. Now running in the 12.8 range flat for afr. Runs very good otherwise.

 

out of curiosity, had you tried an early AP2 ecu? i just wonder about the cost difference between that, and buying a VAFC + harness + adjustable FPR. I suppose the downside would be a loss of flexibility if you further modified the car (exhaust, intake, etc..)