95sc300t

Hi guys, just seeing if anyone had this issue...

I just bought a 95 SC300, that I will soon be installing a turbo on.

Before I do that, I need to figure out why it has a bit of hesitation, or stumble right around 2700 rpm's..

Any gear, same thing. Its most noticeable at mild throttle points, as if I floor it off the line, I almost don't notice at all.

Any ideas? THanks.

Oh yea.. Also was wondering what the best price for the TRD LSD anyone here has found, for the same car..

95sc300t

Just wanted to give everyone an update.. The hesitation ended up being caused by a faulty mass air sensor.. Or airflow meter, or whatever Lexus calls them on these cars.

Normally in the range of $680.00 from your local Lexus Dealership, I got one new one from Park Place Lexus for $385.00'ish, and it took about 15 minutes to swap out with the faulty one, and problem cured.

Sux though, cause I'm going to be going with a VPC with my turbo upgrade, so I won't be needing my MAS anyways soon.. Oh well.

Lexmexico

If I read your location correctly, your in Colorado?

In Mexico City, about 3,000 feet higher than Denver, I also get a slight hesitation around the same point in my 99 RX. However, Toyota said this is quite common for vehicles without carburator adjustment due to thinner air.

///MDex

You have a carburetor on your RX?

In North Carolina, about 3,000 feet below Mexico City, and about 3,000 feet below Colorado, I don't get a slight hesitation at all in my 1998 GS. However, I don't have an SC, or and RX, nor is my car carbureted.

LB Lex

No Lexus has a carburator, they all use fuel injection, which will compensate for altitude.

Lexmexico

I never said Lexus and Carburator, that is a statement of Toyota with regard to vehicles in general. Reread my post. Perhaps my grammar was not clear.

The problem I get, and this is quite normal and nothing wrong. Fuel Air-Ratio cannot adjust to altitude, and throws a fuel trim lean error code on my OBDII sensor. I drive up to San Antonio and drop several thousand feet, check engine light goes off. I know of at least one diplomat with a European Lexus RX300SE here who suffers the same problem and also has hesitation. However, this is a problem of being in Mexico City, as the problem goes away at sea level. The injectors are thoroughly clean as I have been putting Techron additive in the car every 3,000 miles, and the O2 sensors check out fine. I am not sure of another place in the world where a Lexus might have the same problem. However, I have heard of Lexus now being sold in Bolivia, where that nation's capital is 13,000 feet up. Perhaps Lexus specs never planned on this.

LB Lex

We were just suprised that Toyota made such a silly statement.

VVT-i

All the vehicle with EFI system used MAP sensor ( Manifold Absulute Pressure) to monitor the altitude and send the signal to ECM to adjust the fuel pressure.

Lexmexico

VVT-i,

Toyota Mexico mentioned to me on Friday that the cars sold in Mexico have a software modification(due to Mexico City sales) to prevent exactly what is occuring to my vehicle. Are you aware of the actual altitude range of the MAP sensor?

95sc300t

There is a fine-tuning screw on the airflow meter.. I might take my old, faulty airflow meter and make some adjustments to that meter, to see if I can make the problem go away.. MMMK?