1999 RX300 Stumble/Shudder off idle
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New to Lexus and new to the forum. I just purchased a 99 RX300 from a neighbor who moved to Hawaii. I noticed after I bought it ($1,700) and it looks brand new, so I'm not complaining that it has a slight hesitation/stumble just off idle and lack of power, also error codes or CEL. It has 150,000 miles, new plugs (OEM), timing belt has been changed at 110,000 miles. I replaced all the coils, one went bad so I replaced the all, cleaned the MAF, I actually used another known good MAF to test with and I still have the problem. Any other ideas.
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New to Lexus and new to the forum. I just purchased a 99 RX300 from a neighbor who moved to Hawaii. I noticed after I bought it ($1,700) and it looks brand new, so I'm not complaining that it has a slight hesitation/stumble just off idle and lack of power, also error codes or CEL. It has 150,000 miles, new plugs (OEM), timing belt has been changed at 110,000 miles. I replaced all the coils, one went bad so I replaced the all, cleaned the MAF, I actually used another known good MAF to test with and I still have the problem. Any other ideas.
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Thanks, I scanned for codes and none showed. I tested the scanner by pulling the MAF connector and codes came up for that. Plugs are NGK, I cleaned the IAC and the throttle body, neither where to badly fouled. The coils are a generic brand, and I tested them by disconnecting the connector and checking for RPM drop. I will check the OCV next.
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Thanks, I scanned for codes and none showed. I tested the scanner by pulling the MAF connector and codes came up for that. Plugs are NGK, I cleaned the IAC and the throttle body, neither where to badly fouled. The coils are a generic brand, and I tested them by disconnecting the connector and checking for RPM drop. I will check the OCV next.
Last edited by AnthonyMtz; 01-06-16 at 07:14 PM.
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Have you found the problem yet.
I have the same problem but have not yet replaced the parts mentioned.
Was it your OCV ?
I had one go bad, but the wire had broken off the harness and thru a code.
I have the same problem but have not yet replaced the parts mentioned.
Was it your OCV ?
I had one go bad, but the wire had broken off the harness and thru a code.
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