Quick acceleration bogs the engine down. Ideas?
#1
Quick acceleration bogs the engine down. Ideas?
When the RX is in park, I can slowly rev the engine. BUT if I rev it quickly, it sounds like it's choking out and the RPMs stay flat, even with the accelerator halfway down. It even backfires once or twice.
When driving, accelerating feels bogged down most of the time -- like I'm towing a jet ski.
The check engine light's on -- P0171 (bank 1 running lean) and P0440.
I cleaned the MAF, IACV, and throttle body. Even with the intake off, the fast revving acts the same. Filled the gas tank with premium + fuel injector cleaner.
Any ideas?
When driving, accelerating feels bogged down most of the time -- like I'm towing a jet ski.
The check engine light's on -- P0171 (bank 1 running lean) and P0440.
I cleaned the MAF, IACV, and throttle body. Even with the intake off, the fast revving acts the same. Filled the gas tank with premium + fuel injector cleaner.
Any ideas?
Last edited by Frankdorn; 06-23-13 at 02:57 PM. Reason: Edit: P codes corrected
#2
Moderator
Please have the codes re-read.
If you can clear them and wait till they come back, that would be good too.
Salim
If you can clear them and wait till they come back, that would be good too.
Salim
#5
Moderator
Check the vacuum pipe, behind air cleaner box.
Seems like vac problem.
Salim
Seems like vac problem.
Salim
#7
Super Moderator
Take one more look at it, both the red diode and the threads inside it to be sure you can see the 2 threads are clean, but if you are still getting that error, then replacement.
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#9
Lexus Test Driver
#10
Moderator
Talking about cleaning ,,, please read the label on the cleaner. Not all cleaners are safe to be used on MAF.
Salim
Salim
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