zoomnos2

I have a '91 lexus ls400 that has 89,000 miles on it but i had let it sit in my garage for 6years , i drove it a few times here and there but rarely . well now i miss it and it wont run right .

i havent drove it aat all the last 3 years and now it like bogs down like its running out of gas and idk why ??? i replaced : mass air flow sensor , crankshaft sensor , flushed gas lines , put new gas in it , fuel filter , cleaned injectors !

no check engine light .

anyone have any ideas about this ?

mrwinkle

can you shoot a vid so we can see what is going on?

Abdiel

have you checked the spark plugs and wires. Mines did the same for a while and it had 2 burnt out spark plugs.

deanshark

First thing ya did wrong was letting it sit that long without even starting it every once in a while. The problem could be a number of things. Check what you have for fuel pressure to see if the fuel pump is working correctly. Just b/c it feels like it's a fuel problem doesn't mean it is, it could be ignition related, check resistence on the coils, plug wires, and stuff. Also, a very good possibility is maybe some little rodents built a nest in your exhaust and it's clogged. An exhaust shop can check the pressure or you could unhook the exhaust before the front cat and see if it changes anything.

1UZAristo

Yeah, an older engine sitting around is never good, many seals could have perished in this time creating all kinds of problems from vacuum leaks to fuel leaks.

I would check fuel is flowing and the ignition system is ok, spark plugs could be a good starting point to replace.

The engine ECU could also have leaky capacitors, so it may be good to open that up and inspect.