Rough Idle Due to Intake Manifold Vacuum Leak on Mazda 626

The intake manifold gasket can fail causing vacuum a leak and/or a rough idle condition. Replacement of the leaking gasket will be necessary to correct this concern.

RepairPal Verified
Average mileage: 139,959 (98,000–190,000)
Engines affected: 2.0L 4 Cylinder, 2.5L V6
5 model years affected: 1998, 1999, 2000, 2001, more2002
16 people reported this problem
9 people shared problem details
2000 Mazda 626- 2.0L 4 Cylinder98,000
Car idles roughly while sitting at lights and in park. The rpm's on the vehicle are very low as well.
1999 Mazda 626- 2.0L 4 Cylinder145,000
Rough idle, stalling, idled fine if you kept foot on gas. Intake gasket was blown out. Replaced gasket. All is well
2000 Mazda 626- 2.5L V6125,000
Whenever I sit at a light, in traffic or through a drive-thru my car shakes and makes a bit of noise. I took it to a repair show and was told I have an exhaust leak.
2002 Mazda 626- 2.0L 4 Cylinder99,000
Idles low in drive shuts off
2000 Mazda 626- 2.0L 4 Cylinder
car cuts off sporadically
2000 Mazda 626- 2.5L V6190,000
rough idle, engine surges especially when in drive. have to put in neutral to keep running when decelarating.
2001 Mazda 626- 2.0L 4 Cylinder
intake gasket fail sprayed starting fluid to find leak replaced gasket
1998 Mazda 626- 2.0L 4 Cylinder175,000
Surged to the point of stalling. I ended up spraying carb cleaner at the point where the intake met up to the head and found when spraying the carb lceaner at the no 1 cylinder, the engine speed noticibaly changed. The Intake gasket was replaced and the issue was resolved.
2000 Mazda 626- 2.5L V6150,678
Car is all of a sudden riding ruff. If car is in park and on the speedometer moves from 0 to 20 mph. And finally feels as though transmission is slipping.
Related Items:
ok so were on the intake manifold and does that causes it to hiss?
what are the most common oil leaks in this engine?
um i shook it and some shakes inside of it and egr in on top of the vaule cover right but the funnie thing is that lik were the hissen comen frm lik it louder on top but wen u go underneath the ca...
advance auto told me a vacum leak but today i check under my car all over cudin feel no air or...
The "Bypass Air Control Valve" can fail causing a low engine idle and possibly stalling.

Related Content