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Old 08-01-2005, 03:31 PM   #1
Scooby Newbie
Member#: 34811
Join Date: Apr 2003
Location: Denver
04 Baja T

Default turbo - heat related issues?

Hi, it's been a while here...

I have 04 Baja Turbo manual shift, and when it's hot (90+ degrees), after a while, when I come to stops, two things seem to occur occasionally.

1) RPM occasionally drops so much the engine start choking. Fluff the throttle, and it's back as if nothing had happened. My old Celica used to do that, and it was related to the loss of the vaccume somewhere. Baja - it's been doing this 4~5 times a year since the first summer. Almost as if ecu isn't catching up or something.

2) Similarly during a hot day, coming to a stop at the intersection. Put the gear in the first gear occasionally result in "clunk" feel - as if the gear was dropped off. Feels as if there is no gear (weird description, I know). Also did that last summer - nothing to do with the "old" transmission fluid, I don't believe.

Anybody ever experienced the same? I regularly change/check the oil myself... Of course, the dealer can't reproduce either of these, so no issues to them. Any idea? Thanks in advance!
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Old 08-01-2005, 04:18 PM   #2
Scooby Specialist
Member#: 72014
Join Date: Oct 2004
Chapter/Region: NESIC
05 Baja gone
Winner best wax job 06WBM


if the AC is on I get that choking feeling ...other then that i have no idea..
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Old 08-02-2005, 11:07 PM   #3
Scooby Newbie
Member#: 63681
Join Date: Jun 2004

A lot of vehicles these days seem to have weak idle issues...I think it may be due to emissions systems, but if it kills at idle that's another issue and dangerous and should be addressed.
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Old 08-03-2005, 03:23 PM   #4
Scooby Newbie
Member#: 34811
Join Date: Apr 2003
Location: Denver
04 Baja T


Hey thanks for the advise. I'm not sure what I can do - not too often, so I may have to wait until it truly becomes a problem.
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Old 08-03-2005, 05:19 PM   #5
Scooby Newbie
Member#: 69294
Join Date: Aug 2004
Location: Washington The State
2004 Baja Turbo
Regatta Red / Silver


My '04 BT often clunks rather loudly when the A/C is on.. I am pretty sure there is a WOT (wide open throttle) switch on the A/C compressor... the A/C cuts out immediately under an urgent call from the throttle control software for maximum power, but it makes a clunk as the compressor cuts out severely... or at least that's my assumption...

The A/C does suck down a lot of throttle response, especially on the low end... but over 3000 rpm, things begin to get back on boil... the problem might be that the BT is too powerful without the A/C...

And my 5MT also clunks sometimes loudly as driveline torque flexs the tranny mounts... I have heard, anedoctally, that the harder STi tranny mounts will alleviate some of this driveline flex...
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Old 08-03-2005, 09:28 PM   #6
Mike Franke
Scooby Newbie
Member#: 61518
Join Date: May 2004
Location: Tampa, FL
2003 Baja


for what it's worth, my '03 responds rather violently to the A/C compressor cycling, but it's never stalled. It takes a split second, then it settles to the trademark smooth idle.

As far as the 5mt, I've had not one tiny problem or noise, but as an awd vehicle, with the driveline lash that's ever-present, it requires some feel to drive smoothly. My buddy, who's an Acura TL S-type owner, actually prefers to drive my Baja, but constantly comments on how much lash is present on decel, even if just to coast-down a bit.

Funny, he doesn't notice it when I drive....I told him that's what A/T's do; they dumb you down...
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