Luisb1982

So i some how i fried my ecu and im having trouble find one but was wondering if a p72 map will run a f20b with out it being chipped just the map thats on it

Aradin

Will it run it? Probably. Will it run it well? No, not at all.

If you need to baby it back and forth to work like that for a few days, you might be able to do that. Don't consider it a permanent solution and don't beat on the car.

Luisb1982

How bad will it run

Aradin

It's going to be very lean.

Will it be lean enough to melt things? I guess you'll find out if you try it.

If you like your F20B just order a chipped ECU with a basemap and then get a proper tune. You may want to figure out why your first ECU fried though.

Luisb1982

will an h22 ecu work found one of those

Aradin

Better than the P72. Still not gonna run perfect. It'll run rich with the H22 ecu.

Luisb1982

Well ok so my car runs but it sound like it's misfiring and i changed everything even the distributor and ot wont go over 2 and half grand when i rev it so i assumed it was the ecu cuz thats what was left

Luisb1982

I hit a big pot hole and after it started running like that so. But im completely lost on what it could be

Aradin

Any smoke? Oil consumption? Bad noises? Have you done a compression test to verify the engine is healthy to begin with?

What ECU is in it currently?

Luisb1982

I did check the compression and its good and its running a p06 with a jumper and a f20 tune i had it tuned at a shop. It been running perfect until i hit the pot hole its not smoking it rev to 3000 for a few minutes and then it dropped down and wouldn't go over 2500 and it was bucking so i dont know if something like a sensor went bad

Aradin

What was it tuned on? Crome?

Do you have any CEL codes?

Luisb1982

It did have a cel light but they couldn't read it. And i dont know what it was tuned on but i check on honda tech and i changed everything they said and it still didn't change

Aradin

ECUs usually go bad or they don't. If it's still starting the car and not throwing a solid CEL, chances are the ECU hardware itself is fine. I have seen some fluke instances where this is not the case but it's rare.

If your ECU has a basic socketed chip inside of it, try removing the chip and seeing if the car runs any differently. If it runs the same, you likely need a new chip with your tune loaded on it because your chip is corrupted or bad. The basic SST chips, often used with Crome tuning and sometimes with Neptune, can and will go bad randomly.

If you have Neptune RTP or Hondata S300, it could be a problem with the daughter board and it will need to be checked out by someone who knows what they're doing.

Finding out what code it was throwing would be helpful too.

Luisb1982

I have another ecu but its for an auto and my car is manual so the small plug on the end doesn't have any pins is ther any way to pin that plug and use it