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08-28-2005, 10:52 PM | #1 | |
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Location: Perth Amboy, New Jersey
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98 Mazda 626 Gas, Spark Plug, Idle Issues
**Manual 1998 Mazda 626 4cyl** Wow this car has caused me many problems.. I would appreciate if I can recieve some advice concerning the certain issue the car is going through. Well here is the breakdown.. the timing belt is new, coil, fuel pump and a number of clean outs such as fuel injection cleaning and radiator flushed out. So the issues now are #1 car hesitates to start up so u need to press on the gas to help it turn on #2 "3" spark plugs were filled with fuel and the other one had carbon deposits on it. So i took it to an authorized Mazda Dealership and this is what the diagnostic came up with.
==Codes P0301 and P0420 in system #1 Cyl misfire and IAC valve duty cycle higher than expected. Needs new fuel filter hose from filter to fuel rail. Needs Pre-Cat replaced due to efiiciency below spec. Needs new idle air control valve. Also needs new drive belts.== So these are the results from the diagnostics but came to a high cost to fix. The mechanic had told me that if the problem still continues than there could be a problem with the PCM. If someone could confirm with me that these issues fixed could solve the problem or if someone has had the same problem I would appreciate your help. |
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10-14-2005, 06:28 PM | #2 | |
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if any one needs an IAC valve for a 1998 Mazda 626 4 cylinder, I have one for $400. Brand new.
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12-18-2005, 03:11 AM | #3 | |
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Re: 98 Mazda 626 Gas, Spark Plug, Idle Issues
Start with the Idle Air Control valve - a white plastic cylinder (2.5"dia X 4" approx) under the inlet manifold - diaphram wears out. In Oz you cant buy them for the older Fords or Mazdas so I removed it and blocked the pipe using a bolt and a pipe clamp. Working well (12 months later).
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12-18-2005, 04:23 AM | #4 | |
AF Newbie
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Yes.. Either replace the IAC valve or block it off like RicW said. You might be able to go to a jucnk yard and get one cheap.
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12-18-2005, 10:10 AM | #5 | ||
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Re: 98 Mazda 626 Gas, Spark Plug, Idle Issues
Quote:
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12-18-2005, 12:51 PM | #6 | |
AF Newbie
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Part Stores offer many grades. You just have to keep on telling them that is what you want. I always go for the lifetime warrenty, just to be safe.
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