Wierd idle

[firestoned]

I noticed this yesterday when I was at a stop light. I had my car in neutral, it was idling at 700rpm's, I pushed the clutch in, put it in first, and the rpms went up to 1150. I also noticed that the throttle would 'hang' for a second or so at high rpms after I let off the gas in the lower gears.

I reset the ecu yesterday after I noticed this, and everything seemed to be back to normal, even this morning on the way to work. But just now, I came back from a job, and it was doing the same thing.

I havent put the bypass plug in yet for the standback to see if thats causing the issue, thats my first step, i guess. Anybody else have any ideas?

[SpeedRacer]

Thats really weird I'd datalog it Eric with the dashhawk watch your Fuel pres and AFR when that happens also do your fuel injection amount

[Colombia28]

<div class='quotetop'>QUOTE (SpeedRacer @ May 22 2008, 12:57 PM) [url=index.php?act=findpost&pid=47627]<{POST_SNAPBACK}>[/url]</div>

Thats really weird I'd datalog it Eric with the dashhawk watch your Fuel pres and AFR when that happens also do your fuel injection amount[/b]

This is your answer to everything :P

"My gf is acting all strange, what should i do?" - Me

"Datalog her." - Josh

[SpeedRacer]

har har har.

[firestoned]

<div class='quotetop'>QUOTE (Colombia28 @ May 22 2008, 04:38 PM) [url=index.php?act=findpost&pid=47661]<{POST_SNAPBACK}>[/url]</div>

This is your answer to everything :P

"My gf is acting all strange, what should i do?" - Me

"Datalog her." - Josh

[/b]

i was gonna say the same,

The car ran fine all last night, and this morning, i have the parameters set to datalog if it happens again

[goldrocket]

Either you're right aboout the bypass plug, or you idle speedcontrol is bad. I'd bet on the bypass first.

[EvoXGuy]

Could be a leak from your BOV vac line or the recuclated tube or the intake maf housing is not the right size and the car is not taking in the right amount of air. Just a thought

[firestoned]

confirmed no leak through bov, hoses, and the maf housing hasnt been changed, so thats fine...

the bypass plug is there only to run the car without the standback installed, that didnt make any difference, standback is fine. the problem hasnt been duplicated yet, so its hard to find problems...

[firestoned]

Today, car threw a P0704 (Clutch switch input circuit malfunction) AND a P0507 (idle speed higher than expected)...did a search, on both codes, and found this::
http://www.mazdas247.com/forum/showthread.php?t=123637185

Also found this:


DTC P0704 [FS]

DTC P0704 Clutch switch circuit malfunction
DETECTION CONDITION

* PCM monitors changes in input voltage from the clutch switch. If PCM does not detect PCM terminal 6 voltage changes while running vehicle with vehicle speed above 30 km/h {19 mph} and stopping vehicle 10 times repeatedly, it determines that clutch switch circuit has malfunction.

* Diagnostic support note This is a continuous monitor (CCM).
* MIL illuminates if PCM detects the above the above malfunction condition in two consecutive drive cycles.
* PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.
* FREEZE FRAME DATA is available.
* DTC is stored in PCM memory.

POSSIBLE CAUSE

* CLT switch malfunction
* Open harness between clutch switch terminal A and PCM terminal 6
* PCM malfunction



Anyways, called Mazda, the part is a whopping $7.75.... Pretty damn sure this will fix the problem, part is ordered, and will be here NEXT Thursday....just in time for NOTHING (because NOPI SUCKS ASS)

[Rich]

Sweet Eric....glad it seems to be an easy fix. Keep us posted.