Just replaced the ECU, screw set to anticlockwise, disconnected battery took it for a drive to learn engine, there is a intermittant injector mis on quick acceleration when I back my foot off slowly it runs smooth. Idle is smooth in park, but hesitates in drive when stopped at the lights fluctuating between 900/500, under load perfect no fluctuation, cruise control runs perfect on open road I also replaced the MAF, spark plugs, fuel filter, oil changed and filter, spark plugs appear to be running lean, whereas before the problem with the prior ECU were running very rich,
There no vacuum leaks compression is 160 each cylinder, coolant sensor works, timing is spot on, doesn't overheat. Original ECU put the car in limp mode after diagnostic would not reset.
check engine light sayed on all the time. No light now.
Question do I have to adjust the IAC, I think some mechanic played with the screw under the black rubber on top of the IAC prior to all of this, the reason I ask it appears that ECU is not in control at idle because when I engage the A/C no revs changes are noticeable whereas before all of this drama it did up the revs at idle. If this does require adjustment I know that screwing that screw all the way clockwise shuts off IAC. Do you know if this would work by then turning the screw anticlockwise until 1000 revs is acheived. If so can I just adjust this with the igntion off then starting the vehicle and repaeting same until 1000 revs is achieved. Or do I have to disconnect the soleniod and do it with the engine running.
have the same problem?
Saturday, February 23rd, 2013 AT 10:01 AM