Mazda 323,Mazda 626 & Mazda 929 Whether the compact 323, the mid sized 626, or the full sized 929, these vehicles remain very popular even though production has stopped.

too high-accelaration

Old Feb 13, 2012 | 11:25 PM
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Default too high-accelaration

Hi Folks,
My 1989 323 1.6L sohc 5spd. Has a very high accelaration especially when cold. I have checked the: maf, the tps and throttle body adjustment screw, but nothing helped. Anyone has any idea what could be causing this delema. I even looked for vacuum leaks with no results.
Any help will be appreciated. The car sounds like a F-16 on the tarmack.
Thanks...
 
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Old Feb 14, 2012 | 05:54 AM
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Acceleration as in driving it gets up to speed really fast or do you mean it has a very high idle?
 
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Old Feb 15, 2012 | 06:23 PM
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Sorry, I meant it has a fast idle...
 
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Old Feb 15, 2012 | 06:27 PM
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Originally Posted by MazdaTirol
Acceleration as in driving it gets up to speed really fast or do you mean it has a very high idle?
Sorry, I meant it has a very high Idle...
 
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Old Feb 15, 2012 | 07:29 PM
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does the idle slowly get normal as the car warms up or does it matter if it is warmed up or not
 
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Old Feb 15, 2012 | 09:18 PM
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Ok. At first the Idle came down as it warmed up, but now it stays up no matter how warm it gets. I've just ran out of options, or where to look.
any help will be appreciated...'
Thank you.
 
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Old Feb 16, 2012 | 12:30 PM
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There is an engine coolant temperature sensor. Worth checking...If the ECU doesn't know the temp it can't adjust.
 
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Old Feb 17, 2012 | 09:42 PM
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Originally Posted by tanprotege
There is an engine coolant temperature sensor. Worth checking...If the ECU doesn't know the temp it can't adjust.
Ok, I replaced the engine temp sensor and now what iam getting is the car starts ok, but as it passes the cold mark on gage it goes into an epileptic mode and shuts down. It wasn't doing that prior to the exchange of the ets. Do I need to reset the ECU, I don't know how to do that. I heard you disconnect the ground battery cable, pump the brakes about 10 - 15 times then connect the batt. cable and go for a ride. Do this makes sense to you guys.
 
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Old Feb 18, 2012 | 02:00 PM
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Yes, reset the ECU as you described. Stepping on the brake will turn on the the brake light circuit and drain all voltage that may still be present in capacitors and such.You don't need to pump the brake, just step on it for a few seconds.
It erases the codes in the memory and the ECU starts over on a clean slate. It will have to relearn and self check things. To facilitate that drive normally, include a few highway miles, let it coast to slow down a few times. After a few days it should be up to snug unless something else is not o.k.
If the CEL light comes on please get the code right away.

The best of luck!



Originally Posted by canbeth29
Ok, I replaced the engine temp sensor and now what iam getting is the car starts ok, but as it passes the cold mark on gage it goes into an epileptic mode and shuts down. It wasn't doing that prior to the exchange of the ets. Do I need to reset the ECU, I don't know how to do that. I heard you disconnect the ground battery cable, pump the brakes about 10 - 15 times then connect the batt. cable and go for a ride. Do this makes sense to you guys.
 
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Old Feb 19, 2012 | 12:30 PM
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Originally Posted by tanprotege
Yes, reset the ECU as you described. Stepping on the brake will turn on the the brake light circuit and drain all voltage that may still be present in capacitors and such.You don't need to pump the brake, just step on it for a few seconds.
It erases the codes in the memory and the ECU starts over on a clean slate. It will have to relearn and self check things. To facilitate that drive normally, include a few highway miles, let it coast to slow down a few times. After a few days it should be up to snug unless something else is not o.k.
If the CEL light comes on please get the code right away.

The best of luck!
This might be a stupid question, but before I do the brake thing--do I disconnect the battery before i step and hold on the breaks?
 

Last edited by canbeth29; Feb 19, 2012 at 04:32 PM.
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