hondacivic4g

OK this is what's going on when I stomp the gas the car hesitates for a sec then takes off. Like if you went to run and as you took off a person grabs your shirt for a sec then lets go. Also when this happens the A/F gauge goes from running really rich to deep into the lean area. It's the nonly time it goes into the lean zone. Under full throttle while cruising or halling *** it goes to stoich, but never into lean. So I can't figure out what would cause this?I've tried increasing the Fuel pressure but the car runs like crap when I do that. Right now it's set a 30psi (40psi w/ out Vac line).The only thing I can think of is to switch the PG7 (89 Teg) ECU w/ a PM6 (89-91 civic/crx SI) ECU and see if that helps.
Here is the scoop on the car it's a 90 hatch STD converted to MPFI. These are the mods- D15B8 block, D16A6 head, D16Y8 Intake Manifold port matched to polished GSR TB (polished), Skunk2 Cam gear, V-racing SIR, B&M FPR w/ gauge, PG-7 ECU (89 teg), N2 neuspeed 4-2-1 header,2.25" mandrel bent custom exhaust(Magnaflow race muffler,high flow cat., resinator).

G U E C O

tune that bitch

hondacivic4g

up

murtnabila

you sure it's not running to rich? Try and get a hold of a wideband o2 and test it out. It will be a lot more accurate then the gauge you are relyin on now, unless it is a wideband?

mmuller

whats your timing set at?if is in range, try swapping ecu's as you say

Fobtions

maybe you have the pins on the tps wrong, swap the two outer wires on the plug. see what it does.

cause it seems like your car thinks its full throttle when it should be the other way around.

speedymon

Or switch out O2 sensors

Alpha_omega16

i will tell you that I did the same dpfi to mpfi conversion in my 90 civic hatch and it did the same thing i never found the problem and sold the car.. my best advice to you is get the mpfi wire harness out if the si and put that in it should solve the problem.

i also have some more updated diagrams now i can e-mail them you you if you would like. don't know if they will help.