1999 mazda protege poor idol
1999 PROTEGE 1.8L Barely idols throwing p0171 & P0303. have checked everything! Did notice with the air cleaner open when I place my hand before the mass air flow sensor, restricting air flow the idol picks up and runs normal. Any ideas????
Thanks Jeff |
Read: https://www.mazdaforum.com/forum/maz...g%C3%A9-31136/
Many of same items are still useful on 99 |
good reading, Thanks! Still curious about when I place my hand ahead of the mass air flow sensor, restricting air flow the idol picks up and runs normal.
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If you do that you are choking the engine. The computer figures: hell, raise the idle speed or I die!!!
Do all the cleaning of the TB, IAC Valve and MAF sensor. Check for vacuum leaks, in particular the air intake hose. |
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Thanks to you both for taking the time. Is there any merit to unhooking the battery for 10+ minutes to allow for things to reset? If I do that will I need to relearn it the idol speed?
Jeff |
Originally Posted by jeffnnoble
(Post 151245)
Thanks to you both for taking the time. Is there any merit to unhooking the battery for 10+ minutes to allow for things to reset? If I do that will I need to relearn it the idol speed?
Jeff |
Yeah, I'd probably say give resetting the ECU a shot by disconnecting the battery for a bit, then reconnecting it.
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Ok so it has been auto repair week at my home. After bringing the Mazda int the warm garage and letting the motor warm up. I again was barely idling, I sprayed near the injectors/intake gasket. The idle picked up and began to run normal for a few moments. If I'm not mistaken on the 1.8L that means it is in need of a new intake gasket? I have searched high & low and am not finding a good instruction or video for this repair. So I have a few questions;
Which gaskets should I be replacing other than the intake? Are there o-rings on the injectors? And should those be replaced also? Do I need to drain the coolant for this job? How much time should this repair need? Any other things I should consider while doing this? Thanks again, Jeff |
I think you found the problem. However, I never had to do this job so I can't help with the details. I suggest you get a Haynes Manual. Parts stores carry them.
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