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08-20-2006, 06:47 AM
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#1 |
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1000whp postwhore
Join Date: Jun 2005
Location: Mojave Desert, Calif.
Posts: 1,705
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Main Cause Is ????
This poor idle thing seems to happen to alot of supras. There must be some "usual" cause. I certainly have read a lot of complaints like this.
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Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08. |
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08-20-2006, 11:54 PM
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12psi boost
Join Date: May 2006
Location: Nor*Cal
Posts: 338
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I cleared the codes then drove it around the block and got one code 52 - Knock sensor signal. I did have a couple loose bolts on the intake but they are all tight now and it didnt make a diffrence.
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08-21-2006, 12:10 AM
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#3 |
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12psi boost
Join Date: Apr 2006
Location: Georgia
Posts: 250
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if someone could direct me as to the location of the knock sensor, and the anything related to it, i also have a code 52. and while i could search harder to find it, i havent found it yet. thanks
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My cars: 85 Trans Am- Ehhh- Gone 83 Rx7- Much Better- Gone 86.5 Supra- Love- Not Gone |
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08-21-2006, 01:13 AM
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#4 |
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12psi boost
Join Date: May 2006
Location: Nor*Cal
Posts: 338
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I was also wondering that. I remeber that I unplugged the TPS and the intake temp sensor and plugged them back in while the car was runing wich would explain those codes. But the knock sensor code is still there. I am wondering if air getting in between the air flow sensor and the intake inlet would make it idle like crap cause someone put a PVC pipe where there looks to be a canister of some kind on your guys' cars. lol. I tist it and the engine speeds up so I know its leaking. If I just got a aluminum pipe with silicone fittings that wont leak would that work??? TIA.
Last edited by h8z2luze; 08-21-2006 at 03:44 AM. |
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08-21-2006, 06:34 AM
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500whp yet?
Join Date: Nov 2005
Location: Long branch, NJ
Posts: 1,006
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That canister is some kind of muffler or something. Its pretty pointless. I actually eliminated mine by getting PVC and shaving down the end to fit in the original adapter, And then i used a 3" rubber coupler on the AFM end. And yes, A vaccum leak from the intake hose will cause bad idle, bad gas mileage, And a weird hesitation or shaking when you start off in gear sometimes. Check that out. But since your computer is putting out codes, something is wrong with the tps most likely.
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Yay the supra assistant is gone!!! WEEE!! |
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08-22-2006, 01:15 AM
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#6 |
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12psi boost
Join Date: May 2006
Location: Nor*Cal
Posts: 338
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I drove it a few miles today and it still only has the knock sensor code. I realized I unplugged the tps and the temp sensor thats why those codes came up. (stupidity) I am pretty sure the air intake hose is the problem
 I hope I hope. I will let you guys know... Hopefully I will get it fixed friday or saturday on my days off. Now all I have to do is get new tires and get it alligned.  im excited!!!
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08-22-2006, 04:15 AM
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#7 |
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500whp yet?
Join Date: Nov 2005
Location: Long branch, NJ
Posts: 1,006
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Cool. I wouldnt recomend using pvc as an intake, Try to get one of those ebay "cold air intakes" which is just an alum tube and some couplers. You can get em for like 25$
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Yay the supra assistant is gone!!! WEEE!! |
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