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Aikmanson · 08-17-2011, 10:44 AM

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.

pitman · 08-18-2011, 10:14 AM

heres a good write up TMIOA - Tech Help - 1982*Honda*CX*500*Tc*Turbo, 1983*Honda*CX*650*Td*Turbo

Saabeh · 08-18-2011, 11:43 AM

I doubt it.

Aikmanson · 08-19-2011, 06:16 AM

Quote:

Originally Posted by Saabeh

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.

Saabeh · 08-19-2011, 06:36 AM

How consistent is the boost?

Aikmanson · 08-19-2011, 06:42 AM

Quote:

Originally Posted by Saabeh

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%.

bobg450 · 08-19-2011, 07:26 AM

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.

Saabeh · 08-19-2011, 07:29 AM

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.

rabbit · 08-19-2011, 10:50 AM

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.

lms · 08-19-2011, 12:09 PM

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!"

Aikmanson · 08-19-2011, 02:29 PM

Quote:

Originally Posted by lms

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.

08-17-2011, 10:44 AM	#1
Aikmanson Live, eat, and sleep by TSL Join Date: Mar 2010 Location: Lomontville & Cortland, NY Posts: 1,837	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. __________________ Current Cars 2010 Mini Cooper S 1991 Miata 1995 900 SE Turbo

08-18-2011, 10:14 AM	#2
pitman Flirting With TSL Addiction Join Date: Apr 2011 Location: albany NY Posts: 581	heres a good write up TMIOA - Tech Help - 1982HondaCX500TcTurbo, 1983HondaCX650TdTurbo __________________ i may act like i know everything but i know nothing

08-19-2011, 07:26 AM	#7
bobg450 Flirting With TSL Addiction Join Date: Aug 2008 Location: Seacoast, NH Posts: 913	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. __________________ "Wow, is it actually a reading comprehension problem you have, or just a small one with literacy? " a TrollhattanBilism" '00 VigVert- Nirvana '00 9-3SE DD 2013 Silverado Z71 4WD Last edited by bobg450; 08-19-2011 at 07:29 AM.

08-19-2011, 10:50 AM	#9
rabbit SAAB Road Master Join Date: Aug 2006 Location: Milwaukee Posts: 369	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. __________________ To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

08-19-2011, 12:09 PM	#10
lms Live, eat, and sleep by TSL Join Date: Jan 2006 Posts: 1,338	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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