my car surges and then when i try to give it throttle it just surges faster and when i drive it, it will not go past 2500-3000, this swap is in a 93 civic dx with a d16y8 and i did a auto to manual conversion. i just need to know some things to look at for a starting point. i have already tried ecus. if you have any questions that need answered to help you help me ask away

 

try changing ur ecu

 

also check ur spark plugs nd the wires

 

We really need information. We need to know what ecu's you used and what all you've tried already. 99% of the problems I see after swaps is ecu/harness related.

 

p07

 

Why are you not using a P2P? The P07 is for a 92-95 OBD-1 Civic VX.

 

Or p28. Loading a y8 map onto it is most likely going to be needed.

 

the 8 is changed for obd1 i have used a p28 a p75 a p07

 

i need to figue this out jus a me questins and i will try to explain it

 

i checked for cels and found 2 one for tps and one for iacv. would my problem be caused by the iacv not being connected or if the tps is bad

 

I would assume since that is the CEL's it's throwing then they need to be addressed. When I had a bad IACV it would idle up and down, but drive fine. However, when I had a vac leak it would surge like you are describing which is also indicative of a bad TPS.

 

Pick up a new TPS and set it correctly... i think the voltage with the ignition on should be 0.5v closed and 4.5v at WOT

 

Would either of those cause the car to not exceed 2500 rpm

 

yes, the TPS possibly. Is it possible you have the TPS and MAP plugs swapped backwards?

 

i have swapped them back and forth and no change. i have tried a few different ecus and still nothing. i am not sure if i missed something when installing the d16y8 into the 93 dx civic. this moor ran fine in my friends 93 civic ex

 

and if i had missed taking something out during the auto to manual swap could it not rev past 2500 rpm

 

Sounds like it's in limp mode prolly wiring related doubt it's a componet failure if it ran fine in another car

 

its the same harness that was used in the other car so what kind of wiring problems should i be looking for

 

ended up being the wiring to th tps and the surging is from the intake manifold gasket, thanks for the help