1998 gs400 Engine cuts out when I accellerate hard and hit 4500-5000 rpm .
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1998 gs400 Engine cuts out when I accellerate hard and hit 4500-5000 rpm .
So my engine cuts out when I really hammer on the gas sometimes. It doesn't stall or anything just cuts out for a second and then resumes fine but by that time I've let off the gas considerably. Has anyone had a similar experience that they have dealt with successfully? Could it be something as simple as I need to run a higher octane gas? Or possibly I need to shut off the vehicle skid control so the car doesn't think it's going to break loose.? Thanks in advance
#2
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Hey, welcome to Club Lexus
Can you explain a little more in detail what you mean by cut off? It could be a few things, possibly a clogged fuel filter in which when you step on it, the pump cant throw enough fuel fast enough, I'd start there. Also, whens the last time you did a tune up? Could be a a spark issue. Lastly, if you can re create the 'cut off', then yes, disable the skid control and see if that solves it.
Another thing it could be is in the tranny and it not shifting quick enough. I've heard of this and too am experiencing it. Honestly, I'm pretty damn good with everything in automotive, but transmissions I'm still below a novice. You can try our search feature and focus on transmission threads because I've seen quite a few threads on this.
Again, welcome!
Can you explain a little more in detail what you mean by cut off? It could be a few things, possibly a clogged fuel filter in which when you step on it, the pump cant throw enough fuel fast enough, I'd start there. Also, whens the last time you did a tune up? Could be a a spark issue. Lastly, if you can re create the 'cut off', then yes, disable the skid control and see if that solves it.
Another thing it could be is in the tranny and it not shifting quick enough. I've heard of this and too am experiencing it. Honestly, I'm pretty damn good with everything in automotive, but transmissions I'm still below a novice. You can try our search feature and focus on transmission threads because I've seen quite a few threads on this.
Again, welcome!
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Well I don't really know how to explain it any better . It doesn't stall ..it's just a momentary power loss, by the time I let off the gas and hit it again the acceleration is back. I don't think it's a transmission problem but it's possible. I drive it in manual mode and use the paddle shifters , it's never happened in 3rd gear only in 4th . I'm getting the timing belt done Tuesday so I don't really want to push it again yet until I get that done because there's no history of it being done that I can find and it's got 280k on it . Im going to see if I can find the fuel filter so I can check it out ...I'm still fairly new to the lexus cars . I think your probably right about it being a spark issue or fuel delivery ...the cars had a tune up in the last year supposedly . I know when the vehicle skid control is off it responds faster so I'll test that too once I get the timing belt done Tuesday . In the meantime I'll check the tranny threads and possibly the fuel filter . Thanks for the advice , I'll let ya know what I find.
#4
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When you get that 'cutoff' feeling, is it like a bog where you hear thrrrrrr sound (roll the "r" like Spanish to get the sound I'm talking about ) or is it more of a hesitant? If its the thrrrr sound, yea its definitely a fuel/air issue. I'd check your MAF sensor if I were you too. With all those miles, could be a dirty MAF and definitely a possible clogged fuel filter. For some reason I hear a lot more from the v8 guys having significant performance changes by swapping out the filter.
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When you get that 'cutoff' feeling, is it like a bog where you hear thrrrrrr sound (roll the "r" like Spanish to get the sound I'm talking about ) or is it more of a hesitant? If its the thrrrr sound, yea its definitely a fuel/air issue. I'd check your MAF sensor if I were you too. With all those miles, could be a dirty MAF and definitely a possible clogged fuel filter. For some reason I hear a lot more from the v8 guys having significant performance changes by swapping out the filter.
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I did 5 drain and refills a couple months ago leaving only about 28% of the old fluid . there were some super fine metal particles in the pan but not alot and no large shavings .Colors looking healthy now.
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#9
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Not sure if this helps but the only hesitation problems I've ever had with my '99 GS400 was a cracked hose near the purge valve. It always felt like a slight power loss but took a while to figure it out.
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Yeah I am . I mean its only happened 3 times since I've had the car for 8 months . It's just odd.. and I'd like to fix the problem but it's a 98 so I'm not going to just start throwing money into it doing guess work . 2 of the 3 times it's happened I was on an incline . I'm going to try cleaning the MAF sensor but it's only happened in 4th gear when I floor it..one would think it would happen in other gears as well if that was the problem . And I don't even think it hits the high rpm before it does it..happens pretty fast.
#11
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Here is the area I was talking about...you may have to take off the engine cover to see it better. It's on the drivers side. Check the hoses for cracks or separation.
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Thanks for the tip , I'll check it out. Mines more like a total power loss though . Doesn't feel like the tranny ... it's more like it goes to take a big gulp of air or gas and cant enough so it just cuts out .
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Dam I wonder if it's the vehicle skid control kicking in so it doesn't bust loose on me.
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