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Old 08-17-2011, 10:44 AM   #1
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remedy for sticking wastegate?

After some research I have come to the conclusion/assumption that my it is my wastegate that is sticking at WOT, causing a slight fuel cut/hesitation. I will never get a fuel cut or hesitation at partial throttle, only WOT.

With that being said, what is the best remedy for fixing a sticking wastegate, and where exactly is it sticking? Is it sticking internally, or does it merely need a little lube where the arm meets by the DP?

It is also worth noting I need a helper spring for the wastegate, and have since I bought the car, but it never had this fuel cut until a few months ago.

Thanks.
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Old 08-18-2011, 10:14 AM   #2
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heres a good write up TMIOA - Tech Help - 1982*Honda*CX*500*Tc*Turbo, 1983*Honda*CX*650*Td*Turbo
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Old 08-18-2011, 11:43 AM   #3
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I doubt it.
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Old 08-19-2011, 06:16 AM   #4
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I doubt it.
Hm, possibly. It does not overboost like mentioned in the write up. It just cuts/misses/is not right at WOT. Boost guage reads 17-18 psi.
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Old 08-19-2011, 06:36 AM   #5
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How consistent is the boost?
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Old 08-19-2011, 06:42 AM   #6
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How consistent is the boost?
17 or 18 everytime I floor it (especially with the new IC). The cut is rather consistent too, 2/3 runs, maybe 3/4 of the runs.

It is not that bad of a fuel cut, you can just keep pulling through it and the boost will remain the same, you just know the car is not running 100%.
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Old 08-19-2011, 07:26 AM   #7
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Not that bad of a fuel cut? Stuck waste gate? I'm with Saabeh.

Disconnect the linkage at the waste gate and see if there is any binding.
There is about a 3/4" offset in the rod from the servo to the waste gate arm. Make sure the offset drops down from the servo to the linkage. The waste gate is pushed open by the servo, is closed when the car is not running. How's your fuel pressure?

Whenever I've encountered fuel cut, it was very abrupt, not casual at all. Just my 2c.
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Old 08-19-2011, 07:29 AM   #8
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Unless you're overboosting like crazy, the wastegate is working fine.

Sounds like a misfire from a bad sensor or a problem with the tune or something.
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Old 08-19-2011, 10:50 AM   #9
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I'm with these guys. Doesn't seem like a wastegate issue.

It would be useful to try and get a log run in if you can.
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Old 08-19-2011, 12:09 PM   #10
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When you hit fuel cut there is no "pulling through it", fuel cut is the dash in the face syndrome, followed by: "What the fuck just happened!"
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Old 08-19-2011, 02:29 PM   #11
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When you hit fuel cut there is no "pulling through it", fuel cut is the dash in the face syndrome, followed by: "What the fuck just happened!"
A total fuel cut yes, I had that last year. Truely a what the fuck moment, went down to grab the mail and hit cut in 2nd gear without my seat belt on

Yeah, does not seem to be hardware related, almost all sensors have been replaced within the last year. I am leaning towards software. Thanks everyone.
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