billhinton

95 ls400 poor acceleration reconditioned ecu

billhinton

Poor acceleration after redoing ecu

99LSCHI

I have this exact issue, low idle after cruising or just when at a stop light with the engine warmed up, idles normally @ 600 with the AC or lights on. Engine never stalls, just idles low around 300-400 rpm. Doesn't cause any issues for me just a small annoyance. If anybody knows the fix for this on VVti cars please post it.

BNastee

i've tried all the fixes on my 240k mile 2000 LS400. To no avail. I just leave the A/c on for the increased idle speed.

dveneman

I changed air filter, checked all intake fittings , cleaned throttle body, replaced oem maf sensor, deleted vacuum lines to PS pump, and cleaned out the little intake air passage holes very carefully.
Not sure what helped, but it took care of my same problem.