Family car manufactured by Mazda from 1970 - 2002.
Questions tagged [mazda-626]
36 questions
13
votes
3 answers
Strange noise from timing belt area
I just changed the timing belt and water pump on my 98 Mazda 626.
After I got everything reassembled I started up the engine. I had been running the engine for a few minutes, revved it up to around 3k rpms a few times and started and stopped it a…
Robert S. Barnes
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11
votes
2 answers
My Ignition Timing is Retarded, no seriously, it's really screwed up
I logged some test data to try and help me figure out why my 98 Mazda 626 GF 2L ATX has a rough idle and is suffering from hesitation.
(Speed k/h),(TPS_v),(MAF g/sec),(RPM),(SparkAdvance),(EngineLoad),(ST_FuelTrim)
There are a few things standing…
Robert S. Barnes
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8
votes
1 answer
Rough idle only under load
I'm going to describe the symptoms with a very short history, some preliminary theories ( based on past work I've done on this car ), the data I've gathered and what, if any, conclusions I might draw from that data. The car is a 98 Mazda 626 GF 2L…
Robert S. Barnes
- 15,780
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7
votes
1 answer
Excessive Coolant Expansion: Part 3
Part 3 in the ongoing saga of my 98 Mazda 626 2L ATX's cooling system. Here are links to Part 1 and Part 2.
A quick recap. My coolant tends to overflow my expansion reservoir. I've flushed the cooling system and got quite a bit sediment out,…
Robert S. Barnes
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7
votes
1 answer
Brake fluid leak after recent brake line replacement
I have a 2001 Mazda 626 which had its brake service light come on some time back, and the brakes became spongy and ceased functioning properly.
I took it to my mechanic and he replaced the brake lines. The brakes worked properly for a short time (2…
BCG
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6
votes
1 answer
Why would a brand new water pump make noise?
Many of you followed the saga of the noise coming from my timing belt area after I changed the belt and the water pump.
The noise eventually went away on it's own, and I think we determined with a pretty high level of certainty that the source of…
Robert S. Barnes
- 15,780
- 72
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6
votes
2 answers
Cranks, but No Spark and Can't Connect to the ECU
It just never ends. 98 Mazda 626 GF 2L. It cranks great, but there's no spark at any of the plugs and I can't connect to the ECU. Coil pack is new, I've driven it maybe five times since I replaced it. I've also been having a low voltage from the…
Robert S. Barnes
- 15,780
- 72
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6
votes
1 answer
Excessive Vibrations in Drive when holding down the brakes
I'm working on a 98 Mazda 626 GF 2L with an automatic transmission. While I'm used to driving manuals, I would say that the amount of vibration when sitting stopped in drive with the brake on seems excessive. The excess vibration goes away when…
Robert S. Barnes
- 15,780
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5
votes
1 answer
Do I have a fuel pressure or injector problem, or am I just chasing ghosts?
I just did a fuel volume test on my 98 Mazda 626 2L GF. According Tim Giles book Automotive Service:
Each injector is energized for 15 seconds... Variations of more than 5 ml calls for replacement of the injector.
In the 626 workshop manual, it…
Robert S. Barnes
- 15,780
- 72
- 157
- 249
5
votes
1 answer
Can I use a FN4A-EL Turbine Speed Sensor on a GF4A-EL?
I have a GF4A-EL on my 98 Mazda 626 GF 2L and strongly suspect the TSS is defective. I can't find any sensors for my tranny, but I have read that the FN4A-EL is just an improved version of the GF4A-EL and was wondering if their turbine speed…
Robert S. Barnes
- 15,780
- 72
- 157
- 249
5
votes
2 answers
Mazda 626 1995 automatic won't shift gears
I have a 1995 Mazda 626, 2.0L, automatic transmission.
The transmission won't shift. It stays in 3rd gear and won't go into any other gear. The car does drive, but won't change gear out of 3rd.
The car starts in 3rd gear and stops in 3rd. Reverse…
Barcode
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4
votes
1 answer
98 Mazda 626 GF 2L ATX zero ignition timing at idle?
My 1998 Mazda 626 GF 2L ATX has zero ignition timing at idle when fully warmed up causing a rough idle condition. I've replaced the faulty O2 sensor with no effect on the retarded timing and replaced the Neutral inhibitor switch due to testing…
Justin D
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- 1
4
votes
2 answers
Should the EGR be activated at idle?
My 98 Mazda 626 2L ATX has a fully electronic EGR valve controlled by the ECU. I've been trying to figure out a rough idle problem for a long time, which gets worse when the engine is under load, such as if the brake is held down in drive, if the…
Robert S. Barnes
- 15,780
- 72
- 157
- 249
4
votes
2 answers
Why are my injectors different colors when they all have the same flow rate?
As can clearly be seen in the picture, the injectors on my 98 Mazda 626 2L GF are different colors:
This is even mentioned in the official Workshop Service Manual:
However, both according to the manual and my tests, all the injectors have the same…
Robert S. Barnes
- 15,780
- 72
- 157
- 249
4
votes
1 answer
What does a good injector spray pattern look like for a four hole injector?
I have four hole injectors like this on my 98 Mazda 626 2L GF:
What does the proper spray pattern for this type of injector look like?
Robert S. Barnes
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- 72
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