first off thanks in advance for reading or replying, greatly appreciated, i have been a lurker for many many years, never really posted, signed up once before and forgot the login details, made another account and continued to lurk and read, LOVE this site...

anyways, my problem here is with a gen 2 integra, 1990 gs automatic to be exact. i picked it up from a friend with a code 4 and some smaller issues...well i get it home, replace the distributor with a known good one and fire it up, still code 4, had 2 spare ecu's that are known good and still the same results. also tried another couple distributors and to no avail.... decided to check the timing and noticed the belt seemed a bit stretched, so decided to slap a new one on there, got it timed perfectly, fired it up (all this after re-setting the ecu every time) and no change, after a minute the code appears and car gets into limp mode....checked the connections on the harness and all seems well to me....any ideas of where to check next? im really tempted to replace the engine harness as i feel there is a break in it somewhere....im no electrical guru so i have no clue how to properly check it (tho thats what the trouble shooting flowchart suggest) any ideas on how to check it properly without that dreaded ecu test harness???

again thanks for any input!

 

do you also have trouble revving past 3-3.5k rpms?

if the distributor REALLY was in known working condition,that should have fixed your problem..not really much more to it..unless you have some wiring issue(which is usually the rare case).

make sure you spark plugs are gapped correctly.
make sure spark plug wires are in good shape.