GreyGS350

Car is completely stock besides wheels n springs. Computer says all engine cylinders misfiring

bclexus

It's very common for something that causes one cylinder to misfire to trigger codes that other cylinders have also misfired...when they haven't.

e60bmw

iTrader: (1)

You could try swapping coil packs and see if you can get codes to change. Wheels are not going to trigger anything like that. Did Lexus even hook it up to a diagnostic computer? Or do they just see your non-oem wheels and try to point to that as being the problem?

GreyGS350

Both dealers ran the diagnostics n read the same. T they both told me my wheels causing the problem. I talked to a rep from Lexus corporate n the only thing he advise me to do is to put the factory wheels n test drive the car to see if the issue happens again......

bclexus

Both dealers have told you that your wheels are causing the problem? Exactly what did they define the problem to be? Engine misfiring? Or, something that feels like the engine is misfiring?

Are you saying that the two Lexus dealers' technicians both agreed that your engine was misfiring? (I've yet to hear if they actually confirmed or denied that your engine is misfiring.) And, they both told you the reason for your engine misfiring is due to the aftermarket wheels?

I'm trying to fill in the voids where you have left out pertinent information in your story...

Htony

Logic tells me, on high speed engine tends to run hotter, ignition controller maybe heat sensitive or does not have good grounding? Check loose connectors/pins inside Molex. You may try diagnostic(tune up) specialist who has good experience with this sort of things. Some times specialty shops can help more than dealers can.

rijc99

Go to an independent shop and have them change the cam and crank position sensor.

k0kong

Thats insane that they would suggest the wheels as the culprit. I had a Jetta that used to misfire below 2000 rpms. I changed the spark plugs and coil pack and was fine ever since. I would start with that and possibly look into the fuel delivery system / cleaning the fuel system. Cant guarantee that will solve it but its a start.

bclexus

I don't think we're getting an accurate story on what the OP thinks 'the problem' is versus what the dealers think 'the problem' is. I think the OP thinks 'the problem' is his engine misfiring, but the dealers think 'the problem' is vibration caused by his wheels. What the OP has conveniently left out of his story is what the dealers think 'the problem' is. We are led to believe (by the OP) that the dealers agree that the engine is misfiring and tell him the wheels are the culprit. I do NOT think this is the case. I think the dealers do not think the engine is misfiring...and that the vibration the OP feels is actually coming from his wheels, thus this is why the dealers are saying that his wheels are the problem...

The devil (or truth) is in the details...and without the details we are [incorrectly] led to believe (by the OP) that the dealers are blaming his engine misfiring on his aftermarket wheels.

GreyGS350

Yes both dealers said my wheels are causin the misfire due to the small vibration at 70 mph. I tried telling them that I never had the issue until it hit 60000 miles. That's my argument with them. Bought the car with 42000 a week later I put my after market wheels n car ran fine until it hit 60k.

GreyGS350

Yes I agree with u that they are blaming my wheels n it's total BS. That's why I wanna slap on the stock f sport wheels n test drive the car n I bet it will misfire too at 70 mph. I need to prove them wrong n have it on video n take it from there.

bigblack06

iTrader: (20)

Wow I feel for you as I would lose it as to that being there reason for not fixing an engine problem.

e60bmw

iTrader: (1)

The sad thing is after you take the video and show them using their logic they will say that your other wheels caused the permanent damage of misfires.

bclexus

So, in your opinion the engine only misfires at a ground speed of 70 mph. Does the engine misfire always happen at 70 mph regardless of which gear you are in? Does the misfire always happen at 70 mph whether you are coasting in high gear, or accelerating under load? Does the engine misfire only at 1,900 RPM in 6th gear?

Do you feel it at 70 mph in 5th gear at 2,320 RPM? Do you feel it at 70 mph in 4th gear at 3,235 RPM? Do you feel it at 70 mph in 3rd gear at 4,535 RPM?

Htony

Long time ago, I heard certain wheels/tires combination can cause static generation. In my wild guess if that is the case static being split second high potential like lightning can interfere with car electronics for ignition control. It is hard to believe dealer is making up a false story out of the blue blaming the wheels. My response would be then put on OEM wheels and prove it or you are a^^holes.