05 Lexus GX470 Stutter/Surge/Hesitation/Hiccup
10-25-18, 02:23 PM
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05 Lexus GX470 Stutter/Surge/Hesitation/Hiccup
Hello! I'm really excited to join this group. I was wondering if I could get some help with my 05 Lexus GX470. It has a little over 137k miles on it currently. I've noticed recently that when I am slowing down and getting ready to come to a complete stop that i can feel a little stutter, surge, hiccup. I'm more than positive it's not the breaks either. I also feel this when I am letting go of the brake pedal and when the car starts moving slowly by itself before I even press the accelerator down. It doesn't always do it though. Only sometimes.
I've taken it to two mechanics and they've both checked for pending codes as well and nothing. If there was a transmission issue happening wouldn't the scanners read it? I've changed the spark plugs, air filter, oil filter, and got a new oil filter and I can still feel it. He took my car out for a spin but said he couldn't feel anything weird or felt any kind of "misfire". I had a colleague of mine test drive it and I had to point out when I would feel the issue for him to realize what I was talking about.
Any idea what it could be or what I could do?? I don't want to just throw money everywhere.....
Thanks!!
I've taken it to two mechanics and they've both checked for pending codes as well and nothing. If there was a transmission issue happening wouldn't the scanners read it? I've changed the spark plugs, air filter, oil filter, and got a new oil filter and I can still feel it. He took my car out for a spin but said he couldn't feel anything weird or felt any kind of "misfire". I had a colleague of mine test drive it and I had to point out when I would feel the issue for him to realize what I was talking about.
Any idea what it could be or what I could do?? I don't want to just throw money everywhere.....
Thanks!!
10-26-18, 07:53 AM
#4
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Driveshaft clunk is my guess, common issue, there's a sticky at the top of this forum that goes into more detail.
https://www.clublexus.com/forums/gx-...h-new-tsb.html
https://www.clublexus.com/forums/gx-...h-new-tsb.html
10-26-18, 09:54 AM
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Driveshaft clunk is my guess, common issue, there's a sticky at the top of this forum that goes into more detail.
https://www.clublexus.com/forums/gx-...h-new-tsb.html
https://www.clublexus.com/forums/gx-...h-new-tsb.html
10-26-18, 09:59 AM
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@werewolf I'll for sure have to look into that. I've been finding info about an infamous driveshaft issue. I just wonder if there's a way to figure out whether it's that or not. I am by no means a mechanic and I don't want to get pushed around with different things mechanics claim it could be. I just changed the timing belt, water pump, spark plugs, and air filter on it. I'm not RICH yet.... hahaha.
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10-26-18, 10:38 AM
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@ALAN553 Do you think if I take it into a shop and have them look at the driveshaft that they'll be able to see if it needs to be lubed up? I appreciate you chiming in also to help diagnose this. Thanks!
10-26-18, 12:12 PM
#9
Can’t tell,by looking at it...should be done every 5000 miles in an 05 according to schedule. Older driveshaft design. 6 Zerk fittings. One on each shaft, front and rear and and 4 on u joints
10-26-18, 12:26 PM
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Okay! I hope that's the issue. I just don't want it to be a transmission problem. It's been scanned for any pending codes but nothing was showing up. I love my GX470 and I've only had for a little bit.
10-26-18, 02:28 PM
#11
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The transmission does downshifts as you come to a stop. If those shifts are getting more pronounced, it's time for trying a fluid change (drain + fill)
Chip H.
Chip H.
10-26-18, 02:37 PM
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10-27-18, 12:47 AM
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@werewolf I'll for sure have to look into that. I've been finding info about an infamous driveshaft issue. I just wonder if there's a way to figure out whether it's that or not. I am by no means a mechanic and I don't want to get pushed around with different things mechanics claim it could be. I just changed the timing belt, water pump, spark plugs, and air filter on it. I'm not RICH yet.... hahaha.
- MAF cleaner - spray can from Pep boys (remove and clean the MAF sensor)
- Check air filter and associated plastics
(link to DIY vaccum leak)
https://mechanics.stackexchange.com/...-smoke-machine
- I think bad O2 sensors trip the check engine light - you can use an OBD code reader if this happens -- engines usually fail in the same ways so there should be a google for these codes
- if it's a CAT, then it gets expensive. CATs do fail but I would use a generic CAT to fix here (cost me US$350 for the part on my mom's MDX)
Hope that helps
10-09-22, 01:02 PM
#15
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Having same issue
I just picked up a 2006 and changed the plugs and ignition coils. Still giving me a stuttering type hesitation. it happens usually when I’m cruising and gently push on the gas again. If I let up and then give it more gas it usually stops.
Not sure what to check next? I can’t imagine its transmission, it shifts great. Torque converter? Vacuum leak? MAF sensor?