Why is the idle not working on my Mazda 626?
If the idle smooths out, you have an EGR valve control problem. If not, try tapping the EGR valve and see if it shuts. You can reach under the EGR valve and manually push the diaphragm up and down to see if it makes a difference. You may have to remove the EGR valve completely to check it.
What to look for in a Mazda 626?
Check the PCV hose and lines also. In addition, check the large air intake hose from the Air Flow Meter to the intake manifold for cracks and leaks. They often crack in the valleys and are hard to spot. Another good possibility is the EGR valve is stuck open or the EGR control is allowing vacuum to get to the EGR valve.
How much does it cost to change the transmission on a Mazda 626?
Same as the diagnosis test done at Mazda last week cost me $300 instead of $79.95 as the mechanic had to do all these tests and take it out for a test drive – the hours were counted and I had to pay to find out it was the transmission – and after all that – transmission is ok – it was the Transmission Range Switch which needed to be changed.
What causes the O / D light to flash on a Mazda 626?
He said that when the O/D light “flashes”, it is caused by a malfunction within the computer or a minor defect in the transmission.
If the idle smooths out, you have an EGR valve control problem. If not, try tapping the EGR valve and see if it shuts. You can reach under the EGR valve and manually push the diaphragm up and down to see if it makes a difference. You may have to remove the EGR valve completely to check it.
How can I tell if my idle control valve is working?
To check if an idle control valve is working properly, start by turning on your engine and letting it run for a minute or 2. Then, when it’s at an idling speed, take note of the RPMs in your car. Next, turn the engine off and disconnect the idle control motor under your hood.
Check the PCV hose and lines also. In addition, check the large air intake hose from the Air Flow Meter to the intake manifold for cracks and leaks. They often crack in the valleys and are hard to spot. Another good possibility is the EGR valve is stuck open or the EGR control is allowing vacuum to get to the EGR valve.
What to do when your car is at high idle?
While observing the valve with a flashlight, turn the key to the “ON” position, (DO NOT START ENGINE.) the valve should move slightly. Step 3 – Engine vacuum is a sealed system and must hold a specific amount to maintain proper idle conditions, inspect the engine vacuum hoses and intake gaskets.
Why does my Mazda 626 idle so rough?
The problem began about a month and a half ago when it started getting colder, I live in the East coast. In the mornings, when I initially turn on the car to warm it up, it doesn’t feel as bad. Once the car is warmed up though it begins to idle and feel very rough.
What to do when your Mazda 626 wont start?
This usually needed only in cases when the car has been off for 8 or more hours. It is the check valve inside the fuel pump. Just turn on and do not crank it for a few (6-8) seconds, then crank it, by that time the pump will have filled the line and it will start like magic! Justfixit, you may want totry what pscantlin did in response no. 14.
What kind of engine does a Mazda 626 have?
I have 1999 Mazda 626, i4, 2L engine. It is stick shift. When I try to start the car, engine makes cranking sound on turning key but does not fire up. After doing the same thing, cranking for 8-10 times it fires up and then car rolls just normal. After the engine is fired up it do not have any problem.
How to check idle speed and idle air control valve?
Adjust idle speed by turning the air adjusting screw until smooth running anywhere between 500-800 rpm. 6. With A/C on you should expect to see rpm anywhere in 775-875 range. 7. Disconnect the jumper wire. 1. Start engine and run at idle 2. Disconnect IAC valve connector and verify that the engine RPM changes. 3.
What to do if your idle air control is stuck?
The Idle Air Control Valve/Bypass Air Control (IACV/BAC) may be stuck or bad. You can try cleaning the IACV/BAC. That will often fix a bad idle problem.
What to do if your idle is unsteady?
Try unplugging the vacuum line from the EGR valve. If the idle smooths out, you have an EGR valve control problem. If not, try tapping the EGR valve and see if it shuts. You can reach under the EGR valve and manually push the diaphragm up and down to see if it makes a difference. You may have to remove the EGR valve completely to check it.
What to do if your Mazda 626 has a leak?
Check all the vacuum lines, and make sure they are in good shape and connected properly. Check the PCV hose and lines also. In addition, check the large air intake hose from the Air Flow Meter to the intake manifold for cracks and leaks. They often crack in the valleys and are hard to spot.
The Idle Air Control Valve/Bypass Air Control (IACV/BAC) may be stuck or bad. You can try cleaning the IACV/BAC. That will often fix a bad idle problem.
Try unplugging the vacuum line from the EGR valve. If the idle smooths out, you have an EGR valve control problem. If not, try tapping the EGR valve and see if it shuts. You can reach under the EGR valve and manually push the diaphragm up and down to see if it makes a difference. You may have to remove the EGR valve completely to check it.
What kind of air control does a Mazda 626 have?
Quick testing procedures for the infamous Mazda Idle Air Control (IAC) valve also known as the Bypass Air Control (BAC) valve. This test will work on ALL engine/trans configurations on the 1993-1997 626/MX-6/Probe.
Why does my Mazda 2L shake at idle?
I have a 1997 626 Mazda 2L (manual) and it shook at idle and got progressively worse. It turned out to be the intake manifold seal. Its cheap to fix about $12 for a new gasket. To diagnose it is simple too, spray where the intake manifold joins the engine with a can of “jump start” or similar and if the idle picks up you have an air leak.
How to diagnose an air leak in a Mazda?
To diagnose it is simple too, spray where the intake manifold joins the engine with a can of “jump start” or similar and if the idle picks up you have an air leak. Mazda’s are prone to fault here.
I have a 1997 626 Mazda 2L (manual) and it shook at idle and got progressively worse. It turned out to be the intake manifold seal. Its cheap to fix about $12 for a new gasket. To diagnose it is simple too, spray where the intake manifold joins the engine with a can of “jump start” or similar and if the idle picks up you have an air leak.
To diagnose it is simple too, spray where the intake manifold joins the engine with a can of “jump start” or similar and if the idle picks up you have an air leak. Mazda’s are prone to fault here.
What was the year of the Mazda 626?
The Mazda Capella was commonly known in markets outside Japan as the Mazda 626. The Mazda 626’s sixth-generation was built on the GF platform and released in 1997 for the 1998 model year. My 2002 Mazda 626 car shakes alot.
Why does my Mazda 626 shake when idling?
I’ve got a 1999 Mazda 626 that shakes really badly when idling. It gets a little better when put into neutral, but not much. I’ve had two people suggest possibilities: This started happening in the last year or so. It started out being a mild shake when stopping at a stop light, but in the past 6 months or so it’s any time the car is not moving.
Why does my Mazda I4 shake at idle speed?
The problem is whenever at idle speed, the idle speed fluctuates. Usually going up and down between 500 and 750, causing the car to shake violently. The fluctuations get worse the longer the car sits at idle speed, and eventually causes the car to die. If pulling up to a stop light that lasts for more than 30 seconds the car will die.