WOT Stumble

[ZC4ME]

Ok, a few days ago, I decided to go ahead and do the DPFI to MPFI conversion. All in all it went pretty smooth and the difference in power is very impressive, but I have a couple of minor concerns. My main one is the fact that the car stumbles when I go to a WOT condition. If I roll onto the gas smoothly, it's fine. If I am cruising along and mash the gas to the floor, the car bogs/stumbles, or if I am really hard into the gas, shift gears and get back into hard, it feels like I deployed a parachute until I ease back out of the gas. Here are a few details of what occurred while doing the conversion. My first thought is that it might be the injectors, I used the ones from my ZC because I am waiting for new seals to arrive from Honda for the Si ones. Secondly, the EACV wire colors on the car are different than that of the plug I used to extend it and I am pretty sure that I soldered them correctly as far as pin location , but is it possible to have them backwards and the car still run? Also, the plug on the Fast Idle Control Valve Solenoid did not match so I pulled a plug from something else and used it. Other than those minor things, all was normal. The car does seem to idle faster than it did before. I put a brand new OEM Honda cap and rotor and NGK plugs in it, new OEM Honda wires are on the way, along with the seals for the injectors and some other new gaskets. I am going to check the timimg in the next day or so, but anything else that I should look for?? TIA.

peace
Griff

[pm5]

Maybe ur injectors are too big? I donno i am just guessing but it kinda makes sense though.

[91civicDXdude]

check your timing, make sure you reversed the TPS wires. If youhave doubts about those intake sensors, unplugthem. the car will run fine with no EACV, it will just idle a little rough (low or high, cant remember).

are you OBD0 or OBD1 and if OBD0, did you notch the distributor or just try to rig it up with washers, becuase if you used washers, you rignition timing will be off.

[ZC4ME]

Originally Posted by 91civicDXdude

check your timing, make sure you reversed the TPS wires. If youhave doubts about those intake sensors, unplugthem. the car will run fine with no EACV, it will just idle a little rough (low or high, cant remember).

are you OBD0 or OBD1 and if OBD0, did you notch the distributor or just try to rig it up with washers, becuase if you used washers, you rignition timing will be off.

I plan on checking the timing very soon. I lengthened the TPS wires with another plug that had about 8 inches of wire on it, but I switched the two outside ones around before I soldered it back to the other wire color for color, so that is good. I tried unplugging the EACV, yes the idle does drop some, but the car bogged really badly with that unplugged.

I am OBD-0, this was just putting 89 Si mulitport onto a 91 DPFI car, swapped dizzy's but there was no need to notch anything or shim anything with washers. At least I did not think there was a reason to do any of the aforementioned.

peace
Griff

[91civicDXdude]

Originally Posted by ZC4ME

I plan on checking the timing very soon. I lengthened the TPS wires with another plug that had about 8 inches of wire on it, but I switched the two outside ones around before I soldered it back to the other wire color for color, so that is good. I tried unplugging the EACV, yes the idle does drop some, but the car bogged really badly with that unplugged.

I am OBD-0, this was just putting 89 Si mulitport onto a 91 DPFI car, swapped dizzy's but there was no need to notch anything or shim anything with washers. At least I did not think there was a reason to do any of the aforementioned.

peace
Griff

nm i was thinking MPFI + Z6 swap..