Agreed. Now is it related to insufficient flow or the injectors opening/closing too long, too little, too early, too late.

I wont go into timing yet.


If it's a bad fuel pump, why would it run "OK" under hard throttle when the demand for fuel is greater?

why?, d-series, b- series, all use THE SAME SIZE 240CC injectors.

you have a point there, it is a 200K mile chassis

?

 

I really appreciate all the feedback. So from what ive gathered so far.... its either the ECU map or a fuel issue? Fuel issue I can I can figure out. But the ECU completely throws me. I have no idea about any of that. I have no idea where to start, what I would even need or be looking for

 

what ecu are you running now and what base map does it have? anyone think there is a possibility its not even chippied? Un screw your ECU and look to see if there is a chip. If you dont know take a pic of the ECU opened and post it

 

entirely possible. I bought a bunch of ECU's about 6 months back to chip and guy insisted he bought it chipped and wanted $100 for it so I popped the cover open and showed him this picture. His face was :0

I gave him $30

Look at IC4 and IC4. There are dioede and resistors added elsewhere in the board but this is the quickest way to be sure

CHIPPED ECU



UNCHIPPED ECU



This is a great site: http://www.superhonda.com/tech/honda...ogramming.html

 

I "think" not 100% sure but even a stock P28 will run a B20 "ok"

 

a stock p28 will start and run any honda up until like 2004. it may run lean due to the computer thinking its a d16, but it will run.

 

How about an OBD1 P75? I sent him a txt if he has an OBD0 to OBD1 jumper last night. NO answer. I am hoping yes otherwise the seller lied to him and it may still be running - gasp - the stock P06!

It's a non VTEC LS ECU. It will at least eliminate his part throttle hesitation problem right? And will eliminate 2 variables = incorrect map burned into a "chipped ECU"

If the problem persists, start looking elsewhere.

 

Will check and see if it chipped when I get off work. According to the gut he said the OBD1 was hardwired in to eliminate the jumper and potential melting issues or something like that...?

 

i was unaware you could hardwire in OBD1 to an ecu

 

Is be skeptical to even run a stock vtec ecu just cause of the fact that its a b20. Even with a base map id feel uncomfortable. Everyone knows how sensitive e those motors are even with a mild build. Personally if u have funds is just drop a single in until you were more familiar with the b20 set up. Your going to have problems. Not bashing you op just trying to give good advice bro.