LS400JAY

Hello every on i just had the timing belt changed and yesterday i heard valve noise under acceleration, to day the mechanic adjusted the cams to the proper timing mark they were off. now the car shakes. would a new timing belt require a tune up, would it be too strong for the plugs and wires. my wires have 1994 date stamped on them and also my mechanic accidentaly swapped the left rotor button for the right would that cause running problems.

GRAND_LS 4

iTrader: (2)

NO, it does not require a tune up. Maybe he broke a wire while trying to fix something. But its not a bad idea to change those 11 year old wires. Not sure how they are routed through the engine on yours, because mine doesnt have any wires.

sha4000

iTrader: (1)

check to make sure he reconnected all the vacuum hoses

maniek_LS

Ask mechanic to check if all wires are properly connected to ignition coil outs (there are numbers on the wire and on the ignition cup) MUST be one to one. I made the mistake when replaced my wires - and engine worked as 3-4 cylinders not 8 - see attached photo..

Second: are mechanic sure that properly changed (set) timing belt ? There are special marks to install timing belt.

LS400JAY

Wires were crossed you are the best thank you so much

LS400JAY

Wires were crossed you are the best thank you so much

austxlexus

Isn't it great to save money and frustration when its a simple fix like that?

maniek_LS

Great !! Welcome, on my pleasure

LS400JAY

yes it is a blessing you wont believe after looking at the illustration the same two wires were crossed as the mistake you have made