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Maintenance & Repair Maintenance & Repair - Archived Discussions Q45 Troubles 
135 messages, Last post on Jul 28, 2001 at 10:10 AM
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I have a 93 Q45 with 140,000 miles on it. Last summer it started to have a strange problem. After driving for awhile, (when taking off from a stopped position), the RPM's rev up and it doesn't shift.. The second I take my foot off the gas, the car shifts fine..... I thought it was a transmission problem - but when I took it to the dealer it turned out to be a vacuum hose. They replaced it and it ran fine all winter... Now that the weather is warming up, it is happening again. I took it to the dealer and of course it didn't do it when they had it...... The hose is fine now. Is there some kind of temp. sensor in the transmission that could have gone bad? The car shifts fine except for these rare occasions. They don't know what to tell me..... Help???? |
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Go to Yahoo and search for the Infiniti Owners Club. They have many Q45 owners/enthusiasts that can help you with the problem. Have you read all the posts in here and the Q45 topic over in Sedans conference? If not, you need to spend some time doing research here and Yahoo. You'll know alot more about your car afterwards. |
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| Big brother--possibly the plug wires...I know they're not cheap, but on modern cars they often don't last that long...30K-60K or so. | |
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When it is missing try to jiggle the terminal at the air flow computer (I think that's what it's called) its a small rectangular black box at the front right of the engine as you look at the engine. If this smooths out the engine then have the terminals replaced. (Personally, I don't know what I'm talking about just been there done that and they fixed it) Good luck |
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I own this Q45a and was rear-ended (right rear side)a year ago. Asked insurance agent who quoted for repairs about future problems because of all the high tech. matters i. e. active suspension. Was assured no further damage due to accident. Now, a year later suspension leak - right rear strut area. I need help and if anyone can suggest what I can do without going to the dealer, it will be much appreciated. Thank you, pdjohannes p.s. Jr shiftright can you shed any light?? |
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I called my friend who owns Dependable Tire and Brake here in San Rafael California, a really good front end, suspension and tire shop that does a lot of work for local dealers, racers, exotic cars, etc., and he does not work on this suspension. He refers everyone to the dealer. This leads me to believe that independent shops, even the best, aren't interested in working on this system. You could go to the delear for a diagnosis and an estimate and then take it from there...maybe going online or calling around your area for alternatives. It would be good to know exactly what is going wrong first, though. The less info you have, the less anyone can tell you in return, right? So it might be worth the $100 or so to get a good diagnosis. But I'd insist that the dealer report to you IN DETAIL. Not just "yep, it's broke!" |
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Try going to this forum:
http://clubs.yahoo.com/clubs/infinitiownersclub There is a person with the screen name "texasoil", who has extensive experience with the active suspensions. |
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I have a 1994 Q and it starts to give me the following problem. In parking gear, the idling rpm speed is around 500 rmp, also there is a hissing sound . When shift to drive the rpm dropped and the engine dies. Any similar experience and any idea what might be happening here? Thanks. Christine |
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| Sounds like a vacuum leak. Try running the engine in Park with the hood up and pinpointing the source of the hissing. It's probably a split vacuum hose. | |
| I am trying it. Try to avoid going to the dealer if I can. | |
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