Hi, this car is kicking everyone s ass.. 92 lexus sc400. 128k. Super promote car that I am ready to drive off a cliff. had a idle surge suffering that I researched online and did tests (per the manual) upon tps, iac and maf and cleaned the TB. After irritating 2-3 substitute used IAC s, I took it to the master tech at lexus. He said it was the IAC valve. He tried my used ones.. and finally a rebuilt one. still had issues. assist to the dealer.. this time he says, it needs a ECU. I did a lot of research on them, and found that its a common suffering once this car.. bought a used one.. more trouble. had the native one rebuilt by a specialist.. and that s where I am at now.. Put it in tonight and the car idles at 2k rpm. Does the TPS compulsion to be re-adjusted? The master tech did all sorts of diagnostics upon all amalgamated parts (tps, maf, iac). 0-200 every epoch I endure it get the dealer for diagnostics.. upon going problems are truly additive up. I m unsure to lie alongside the tps if he had it dialed. Any insight? Thanks in advance. Jason
I bought it in July, drove it house from LA (to Utah), and the problems started rudely after I got it home.Any other back up you can give is appreciated. I don't know what else to realize but allow it assist to the dealer. I know I've got the shop foreman in force on it at the dealer, but I still setting its pushed to the urge on as its pass and everyone loses in this situation.
Hello the TPS does have an effect on switching the car into idle mode therefore I'd recommend to create positive the throttle dish is 100% closed and not slightly stranded following carbon. and after that accustom yourself the TPS suitably that the IDL fasten is continuous to the E2 attach afterward the throttle is closed, and gate circuit past the throttle is just cracked. Don't upset not quite any voltages, the IDL open is the really important one.