2006 Lexus GS430 Cylinder Valve Issue
07-26-17, 08:27 AM
#1
Driver School Candidate
Thread Starter
2006 Lexus GS430 Cylinder Valve Issue
Thank you everybody for the advice. I got the problem fixed
Last edited by raysantero; 08-30-17 at 01:25 PM. Reason: Problem Fixed
07-26-17, 09:51 PM
#2
Intermediate
Hello, I recently purchased this vehicle. It has 82K miles on it and was misfiring. I changed the plugs and all 8 coils, and was still misfiring. Compression test on cylinder 7 was 90PSI 1/2 of what it should be on a DOHC engine.
Has anybody else ran into these problems?
Warranty or defect?
Thanks
Has anybody else ran into these problems?
Warranty or defect?
Thanks
Any codes pulled? I guess yes since you refer to cylinder 7. Have you checked the injector on that cylinder and connection harness condition? I would test swapping the injector to another cylinder and test ti discard a bad injector.
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raysantero (08-30-17)
07-26-17, 10:26 PM
#3
Driver School Candidate
An injector or wiring harness fault won't cause low compression (assuming the compression was measured properly).
Assuming there's no sign of carbon in the coolant, or coolant in the oil, the next step would be a leakdown test to establish if the compression is being lost to the sump, intake tract or exhaust system...
Assuming there's no sign of carbon in the coolant, or coolant in the oil, the next step would be a leakdown test to establish if the compression is being lost to the sump, intake tract or exhaust system...
Last edited by Unclejake; 07-26-17 at 10:32 PM.
The following users liked this post:
raysantero (08-30-17)
The following users liked this post:
raysantero (08-30-17)
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