mods...
b20b fully rebuilt from honda, skunk2 intake mani,egay header,apexi ws1,b16 tranny,conv to obd1 ls ecu

problem...
somtimes my car idles fine sometimes it doesnt, when coming to a stop and put in neutral it dies or surges up and down, only cel im throwing is vss, also gets very bad mpg

things tried...
adjusted fast idle screw, changed iacv, checked vaccum leaks,

things i think may cause problems...
overgapped spark plugs? bad mpg old fuel filter?

anyway i need help and yes i did search but i cannot figure it out for the life of me

 

make sure ur timing is where it should be with a timing light, be sure to jump the little connector with the yellow cap thats on the driver side fender well when doing so. ive also had idle problems with skunk2 mani on b16's, switching to a obd1 ls/gsr throttle body always fixed it though (if using a gsr tb u must use the plate fro ur old one that the cable sits on) do a compression check and make sure u dont have a bent or sticking valve, that will lead to bad mpg and idle problems as well as possible high cylinder temps.

 

little connector? can you explain more? i have a b16 tb also dont kno if that makes a difference? tming is dead on with the timing belt and with the dizzy positioned in the middle it dies very quick (aftermarket dizzy) was told these have to be advanced most of the time if not genuine honda...any other help please

 

the connector has a yellow rubber cap over it. its a 2 wire plug, drivers side fender well, colors are green/ white strip and brown. u have to jump the wires with a paperclip or something. this will remove any timimg advance created by the ecu, so that when u use a timimng light u will be able to properly set the timing. i would try a different tb as well.

 

I unpluged the iacv as the engine idle was surging and it stopped but when I chucked a rev it died? Any suggestions? Change iacv I would think but will it still die out after coming to a stop?

 

help

 

bump...

 

What ECU are you running?

I would change the fuel filter and get a adjustable fuel pressure regulator and bump your fuel pressure up to 44 PSI (no vaccum to the FPR) Also check your timing.

To adjust idle;

 

im runnin a obd1 ls ecu...u dnt think its getting enough fuel? timing is dead on, plugs are new (might be overgapped), and i hsve a b18a valve cover so pcv is not there...ne oter thoughts?

 

sorry to bring this from the dead but did you get this resolved?

 

I run a B20Z myself. I've done an obd1 conversion also...but it should be known there are 2 different obd1 LS ecu's.
There is a 92-93 PR4, and the 94-95 P75. The P75 did not work that great for my swap. I switched to the older PR4, and idle, power and drivability improved.