my 4 door is now my family car since we have a little boy now. as of right now it is the only car we have. the car runs fine first thing in the morning or as long as it doesnt get over 160 degrees. once it gets over 160 it acts like it has a bad skip or a miss. its real slow on take off and stutters all the way up until about 3000 rpm's. any help would be greatly appreciated cause as i said this is my family car. ive tried plugs, wires, cap, coil, rotor button, O2 sensor. ive checked the timing and the valve lash. ran a compression test and a pressure test on the cooling system. all of that seems to be fine. like i said any help would be greatly appreciated.

 

tried a different computer this morning goin to work... it didnt really help at all. it actually felt worse than before. i really need some help on this one guys.

 

Is it obd1? Are you throwing any codes as you should be with that kind of problem?

 

I'd check your injectors to be sure everything's kosher there.

Also make sure you don't have any vacuum leaks (although that doesn't sound like a vacuum issue).

 

I second the throwing any codes question. With that information, it should narrow down a lot of possibilities.

 

my civic is OBD0 and unfortunatly no codes. ill try to get a hold to a set of injectors and see if that helps. would a set of OBD1 injectors work momentarily just to see if thats whats wrong?

 

no they wont. you have to use low impedance injectors. OBD1's are high impedance. You should be getting an injector code if it is an injector or injectors causing the problem.

is the car blowing any smoke at all?

did you replace all the parts mentioned as part of a tuneup? or did you replace them in an attempt to solve the problem? The main reason i ask is: was this problem occuring before you did all those parts replacements? or did it start happening or get worse after?



Modified by sanimalp at 12:58 PM 8/5/2008

 

Also OBD0 injectors are different from the OBD1 injectors. The OBD0 injectors use the injector resistor box to step the voltage down from 12 volts to 5.5 volts and the plug inputs for the injectors are different between the two injector types. OBD1 injectors require 12 volts and have two notch cutouts inside the plug input.

 

i know OBD1 injectors would not be a permanant fix... but will they work good enought to make a lap around my block. all of this was done to try and fix the problem. it has only gottin worse over time and nothing i do seems to be working.

 

i drove my brother-in-law's prelude one time and it was doing this (bucking at low rpm when warmed up, only did it under load) and it seems like it went away after replacing the main relay. i don't know why that would be, but it's just a suggestion.

also, did you make sure that you've got a good connection from the coil-distributor and distributor-spark plugs?

 

the plug wires and all are connected good but i havent checked the main relay.

 

i think your Fast Idle Thermal Valve is stuck or needs to be adjusted...

https://honda-tech.com/zerothread?id=1564019

or the IACV is bad..

https://honda-tech.com/zerothread?id=1575913


one of those has to be it..