I have a 91 ef hatch with a stock b20 in it and Everytime I go W.O.T. I fall on its face(lose all power) but drives fine regular even at like 90% throttle its ok but as soon as the pedal bottoms out it falls on its face.....was thinking maybe the tps but still have the stock one with the rivets on it and I have no codes...any suggestions anyone..thanks

 

what ecu are you using? has it been converted to obd1 or not?

Steve

 

It has a p75 and it has an obd1 jumper on it too

 

1.8 liter ecu running a 2.0 motor.

Needs to be tuned.

 

But I can't use a b20 ecu and I thought a p75 was a plug and play ecu for thd b20...anyone else have the same problem or heard of the same because the ecu I'm running?

 

test your TPS sensor.

 

This first. Tps sensors go bad from time to time. I ran a p75 with my b20 in 2002. Ran just fine.

 

Either way you still need a tune. Might as well get it tuned and all of the little kinks like this worked out at the same time. Yes it is plug and play, but it doesn't mean it will work. You can run a number of different ECUs with different Honda motors, D, B, etc, and they will run, but not right. Your car needs more fuel, different cam settings, etc. Tune, better safe than sorry.

 

Cool thanks guys guys ima check my tps and get a tune

 

while that may be true, this motor with a p75 will not fall on its face like this.

 

So, a ecu made for a 1.8 liter, is going to run a b20 to its full power?

Other things might be causing the car to be "sluggish" however it wont be anywhere , where it needs to be, on a p75. Chip the p75 and get it tuned at least, i'm sure it will be a world of difference. Majority of the time an issue like this is caused by timing being off, ign being off, stock ecu or something plugged in wrong.

If the tps reads fine, and the map/tps plugs aren't swapped pretty sure its the fact he's on a stock ecu.

 

No one said it would run to its full power. If you read what I said, it will not fall on its face as the OP has described. I personally ran mine like this before having it tuned and it was just fine and dandy.

 

My bad, for some reason I thought he said it was chipped lol.

 

test tps, get a tune. why put a swap together and just "give up" at the end of the build.