macforsyth

I have a `1997 Lexus LS 400 with 108K miles on it There is a persistent misfire on one cylinder but it moves from cylinder to cylinder. We have had countless parts replaced including the computer rebuilt/reconditioned and it still goes on. Does anyone have any ideas? I'm ready to scrap the thing but I'd like to keep it and let my daughter drive it, as it is low use and a good car.

dicer

You need someone with a good scan tool to check it out, way cheaper than replacing expensive parts, fuel trims would be very helpful, is the miss while just sitting or driving as well? Its a good thing to have the newer than Gen 1 cars. Your car is OBD2 and is way better to trouble shoot with a quality scan tool.

macforsyth

The mechanic shop has replaced coil packs plugs wires distributor cap catalyic converters ECM module Mass airflow sensor etc. tons of new parts on this thing and it still has apersistent miss mow on a different cylinder ARRRRRRgh this is nuts!!

Moarpower

List the cylinders that have the miss. see if they are related to a assigned coil and rotor/cap.

dicer

Sounds like a typical shop of idiots, with zero trouble shooting skills. What brand of scan tool did they use?

spuds

Agree.either dummies or rapists. Want to bet they are first in line to buy your worthless car? I smell a rat.Came to the right place,mechanics here will get you fixed up.

BiGEZ

iTrader: (24)

Do not give up on it just yet, have a reputable mechanic look at it to figure out the issue. Most of the time it is something very simple.

timmy0tool

iTrader: (7)

when a car misfires I always replace the spark plugs first. most of the time it clears the issue. start with the easy stuff first then go from there.

they replaced the cats?! wow that's expensive...

YODAONE

Perhaps defective fuel.injector or....someone dinged a valve while servicing timing belt (?)

dicer

I thought he said all that was replaced? Maybe not? And yes X2 that is normal tune up maintenance stuff. Then get a good scan tool on it.