I have a b16a3 in my 94 civic and it was a swap . now all hell has hit the roof. my engine has been putting out codes TPS, air intake temp sensor and idle air control valve. I have a bone stock p28 ecu but have recently got a p28 chipped and tuned speed innovations ecu. The car starts but barely wants to go. stomp on it and it starts back firing and popping. im not sure if the ecu will make that stop but i just need help on this thing. ahhh!!!

 

you need a p30 ecu

 

and have you check the plug order in the distributor,maybe some wires are in the wrong place.

 

i have the exact same setup (93 coupe with a b16a3) u do NOT need a p30, my car ran fine on a p28 it was a little slow tho.. i am running a p30 now..

anyways it sounds like ur timing is off (hence the missfiring) or ur firing order is wrong.. check thos nd lmk.

 

yea thanks for the help. i thought it might be timing but i wasnt sure. plus its throwing those codes. i was told it might be the ecu. im getting the p28 chipped and tuned so hopefully that helps. if u have anymore things i should know lemme know

 

The IAT and IACV codes are probably due to the connectors being swapped during the swap, they are very close together and use the same connector, making them easy to mix up.

 

ya you sure u didnt plug **** in the wrong place? alot of the plugs are the same/similar and easy to mix up, some u can even plug in the wrong way. U sure u didnt put IACV in IAT or if u have a 3 wire IACV, u sure u didnt put IACV in TPS?

 

yeah seems like you have a wire mixup problem!!!ohh you cannot plug the 3 wire IACV in the TPS i'm sorry jimster480!!

 

i myself didnt do the swap the person i bought it from did, well he said his mechanic did. it was all wire tucked so it looked all good. the more i started untuckin the more i found **** just wrong. so ill have to try that

 

take some pics of the wiring to the tps/map/iacv..

 

tps and map can get confused. iac and iat have the same plug as long as it is a 2 wire sensor. did it run right when you got it and it just started messing up or was it unfinished when you got it?

 

it ran when i got it but it started acting up. at about 1400rpm it starts to miss fire and then it started popping back fireing and seemed like it was miss firing. not sure what exactly it is. but i didnt know if i put that p28 chipped and tuned in if it would change it. im going to check the timing too with a timing light and see if that will help. cause with the p28 stock i was hitting vtec now it wont even do that. i got a new distributor a 44u and thought that was the problem but it wasnt.-

 

but it didnt pop and backfire untill now. when i stomp on it, it has a delay and then starts miss firing or something.