ive been searching for hrs, and nothing seems to be hitting the nail on the head with the problems im having. so i apologize in advance if i missed a thread or posting about this.....

i just picked up a 91 dx sedan the other day with a mini swap. i kno its a d15b2 block, but im not to sure of what head it is. i was told it had a chipped p28, but i popped it open and i dont see anything that looks chipped, it looks like a virgin lol.


the probs i'm having is on cold starts she wont stay running unless i keep my foot on the gas a little bit, when shes warm enough she stays running but idle is low. when driving you cant keep you foot slightly on the gas because she starts to buck, but as long as your giving it a good amount shes not bad. when shes sitting at an idle and my foot is barley touching the gas she flucuates like the IAC is bad but only when your barely touching the gas ( its like it has a two step set up at ike 1200 rpms, but give it a little bit more gas and she revs up real quick). Vtec isnt working either but i did find a few threads i'm going thru to find that problem.


if anybody has any ideas about the bucking/flucuating it be GREATLY appreciated becuase i'm at a loss right now and i just want to drive my car.


thanks guy/gals

 

could be your tps out of range

 

Have you checked the to what codes its throughing..sounds like tps sensor..If the Ecu is chipped you cant miss it.. You can google to see what it looks like or maybe someone can post a pic for you..

 

think i should just replace it? i never really messed with a TPS before.... she idles at like 200 rpms

 

try adjusting it first

 

sorry i havent gotten back to anyone, been real busy with work...

i replaced the TPS with a brand new one.... shes been runnings fine but on cold starts shes till having trouble starting.... i'm thinking about replacing the engine harness because some things were cut and spliced back together ( done by previous owner, ive only had the car for a week).... if anybody has any other sugestions id greatly appreciate them....thanks

 

IAT (idle air temperature censor) check to see if you still have one plugged in, or if it's bad.

 

I would first start by checking to see if the TPS wires are in the correct order. This exact problem could be caused by the outside TPS wires being in the wrong position. To easily check it - get a multi-meter and probe the center wire. Tell us what your readings are with the throttle closed and with it WOT. Obviously, you do this check while the vehicle is NOT running.