Question about 2000 Mazda MX-5 Miata
Low / uneven idle problem can cause by a lot of components.
Dirty air filter
Dirty injectors + o-rings
Vacuum leak at intake manifold and vacuum hose.
Bad Idle Air Control Motor (IAC)
Low compression (170 psi + is OK)
Start cleaning and repair these trouble spots and see is there any improvement.
For more advance DIY'er then you may try this.
Use a can of Berryman carburetor clean to locate the vacuum leak.
SEE SAMPLE PICTURE HERE
This is a 20-30 minutes job.
Vacuum leaks can occur in following locations.
Intake manifold AND/OR vacuum lines.
Intake manifold is not accessible unless the engine head if off.
You can still check the potential leak by spraying some Berryman near the intake manifold.
Listen for rpm increase after you introduce the Berryman (FUEL) at idle.
Do the same starting from the brake booster unit (the round unit) on the drive side fire all.
Carefully listen for increase of RPM right after to spray the Berryman to the potential vacuum spot.
Get a friend to HEAR the ROM increase or monitor for RPM on the tech.
DO NOT AIM the Berryman into any heat source.
PLEASE RATE my answer if it is useful to you.
Posted on Dec 14, 2009
CEL code or just hear the popping?
First check wires, plugs, coil pack, cam and crank sensors, basic timing, MAF, EGR system, fuel filter and fuel pump.....basically it is probably running lean
Posted on Oct 19, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jul 29, 2015 | 2010 Suzuki Swift 1.6
Aug 29, 2014 | 2000 Oldsmobile Alero
Bad miss at idle?
While stop engine idles like cylinder missing?
Engine Misfire codes for car?
Engine Misfire codes?
Misfire on cylinder 4?
Oil on spark plugs and car misfires?
This will help.
Mar 06, 2012 | 1997 Acura CL
Sep 14, 2009 | 2001 Toyota Camry
Sep 04, 2009 | 2003 Pontiac Montana
Aug 26, 2009 | Jaguar XJ6 Cars & Trucks
Jul 03, 2009 | Ford F-150 Cars & Trucks
Oct 23, 2008 | 1995 Volvo 960
285 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: