Need help
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Driver School Candidate
Joined: Mar 2019
Posts: 2
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From: Nv
Need help
I have a gs300 1998 and i had a code p0171 so i changed maf sensor and it went away now i have a new code p0304 so i checked the cylinder 4 spark plug and changed them all code went away no check engine light but car won't drive loses power in idle the codestill pops up even though the check engine light is not on
Pole Position
Joined: Nov 2018
Posts: 2,077
Likes: 576
From: CA
Clean the throttle out and check for vacuum leaks. Make sure the pcv valve is fully seated, no cracked or damaged hoses. Listen for hissing noises. Use a vacuum gauge if available, or a scan tool to check for lean fuel trims.
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